ClusMetric - distortion 1.88004e+06 1 8 Division of Physical Sciences, University of Hertfordshire, College Lane, Hatfield, Herts AL10 9AB, UK 10 Division of Physical Sciences, University of Hertfordshire, College Lane, Hatfield, Herts AL10 9AB, UK 8 Division of Physical Sciences, University of Hertfordshire, Hatfield, Herts AL10 9AB, UK 8 Division of Physical Sciences, University of Hertfordshire, Hatfield, Hertfordshire AL10 9AB, UK 6 Department of Physical Sciences, University of Hertfordshire, College Lane, Hatfield, Herts AL10 9AB 5 Division of Physical Sciences, University of Hertfordshire, Hatfield, Herts AL10 9AB 5 Division of Physical Sciences, University of Hertfordshire, College Lane, Hatfield, Herts AL10 9AB 3 Department of Physical Sciences, University of Hertfordshire, College Lane, Hatfield, Herts AL10 9AB, UK 1 Division of Physical Sciences, University of Hertfordshire, Herts AL10 9AB 2 13 University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, Cheshire SK11 9DL, UK 31 University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, Cheshire SK11 9DL, UK 23 University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, Cheshire SK11 9DL 4 The Director, University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, Cheshire SK11 9DL 3 University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Cheshire SK11 9DL, UK 3 University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Cheshire SK11 9DL 3 The University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Cheshire SK11 9DL, UK 3 Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, Cheshire SK11 9DL, UK 2 University of Manchester, Nuffield Radio AstronomyLaboratories, Jodrell Bank, Macclesfield, Cheshire SK11 9DL 2 University of Manchester Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, 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Cambridge University, Madingley Road, Cambridge CB3 0HA, UK 5 Institute of Astronomy, The Observatories, Madingley Road, Cambridge CB3 0HA 1 Institute of Astronomy, University of Cambridge, The Observatories, Madingley Road, Cambridge CB3 0HA, UK 1 Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0EZ 1 Institute of Astronomy, The Observatories, Madingley Road, Cambridge, UK 1 Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK Madingley Road, Cambridge CB3 0HA, UK 8 17 Department of Physics, University of Durham, South Road, Durham DH1 3LE, UK 16 Physics Department, University of Durham, South Road, Durham DH1 3LE, UK 14 Department of Physics, University of Durham, South Road, Durham DH1 3LE, UK 11 Physics Department, University of Durham, South Road, Durham DH1 3LE 11 Department of Physics, University of Durham, South Road, Durham DH1 3LE 8 Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH, UK 6 Department of Physics, 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University College, Dorking, United Kingdom 1 Turku University, Observatory, Tuorla, Finland 1 Open University, Milton Keynes, Bucks., England 1 London, University College, Holmbury St. Mary, Surrey, England 1 London, University College, Dorring, Surrey, England 1 London, Univeristy College, Dorking, Surrey, England 1 Crewe and Alsager College, Crewe, Ches., England 14 13 Commissariat a l'Energie Atomique, Service d'Astrophysique, Gif-sur-Yvette, Essonne, France 14 Commissariat a l'Energie Atomique, Service d'Astrophysique, Gif-sur-Yvette, Essonne, France 10 Commissariat al'Energie Atomique, Service d'Astrophysique, Gif-sur-Yvette, Essonne, France 9 Commissariat a l'Energie Atomique, Section d'Astrophysique, Gif-sur-Yvette, Essonne, France 7 Commissariat a l'Energie Atomique, Service d'Electronique Physique, Gif-sur-Yvette, Essonne, France 2 Commissariat al'Energie Atomique, Service de Physique Theorique, Gif-sur-Yvette, Essonne, France 2 Commissariat al'Energie Atomique, Service de 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Catolica de Chile, Santiago 1 Ministerio de Educacion de Chile, Santiago 16 113 Cordoba, Universidad Nacional, Argentina 241 Padova, Universita, Padua, Italy 51 Sao Paulo, Universidade, Sao Paulo, Brazil 45 Madrid, Universidad Complutense, Spain 37 Padova, Univ., Padua, Italy 31 La Plata, Universidad Nacional, Argentina 26 Madrid, Universidad Autonoma, Spain 16 Wien, Univ., Vienna, Austria 16 Valencia, Universidad, Burjassot, Spain 16 Valencia, Universidad, Burjasot, Spain 16 Crete, University, Heraklion, Greece 15 Cantabria, Universidad, Santander, Spain 14 CNR, Ist. di Radioastronomia 13 Madrid, Universidad Complutense, Madrid, Spain 12 Santa Maria, Universidade Federal, Brazil 11 Barcelona, Universidad, Barcelona, Spain 8 La Plata, Univ. Nacional, Argentina 8 La Laguna, Universidad, Tenerife, Spain 8 CONICET, Buenos Aires, Argentina 7 Cordoba, Universidad Nacional, Argentina 6 Zaragoza, Universidad, Saragossa, Spain 6 Montreal Univ., Montreal, Canada 5 Porto, Universidade, Porto, Portugal 5 Paris VII, Universite, Meudon, France 5 Madrid, Universidad Autonoma, Madrid, Spain 5 Catholic Univ. of America, Washington 5 Cataluna, Universidad Politecnica, Spain 4 Zulia, Universidad, Maracaibo, Venezuela 4 Toronto Univ., Mississauga, Canada 4 Perugia, Universita, Perugia, Italy 4 Observatorio de Cordoba, Cordoba, Argentina 4 Hohai Univ., Nanjing, China 4 Cataluna, Univ. Politecnica 3 Yerevan Physics Inst., Armenia 3 Toulouse, Universite, Toulouse, France 3 Pais Vasco, Universidad, Bilbao, Spain 3 La Plata, Observatorio Astronomico, Argentina 3 La Laguna, Universidad, La Laguna, Spain 3 Inst. Argentino de Radioastronomia, Argentina 3 Extremadura, Universidad, Badajoz, Spain 3 Bologna Univ., Bologna, Italy 2 Vikram Univ., Ujjain, India 2 Valencia, Universidad, Valencia, Spain 2 Uppsala, Universitet, Uppsala, Sweden 2 Rio de Janeiro, Universidade Federal, Brazil 2 Paris VII, Univ., Meudon, France 2 Padova, Universita, Padova, Italy 2 Melbourne, University, Parkville, Australia 2 Madrid, Universidad Politecnica 2 Madrid, Universidad Complutense 2 La Plata, Observatorio, La Plata, Argentina 2 Kumaun University, Naini Tal, India 2 Cordoba, Observatorio Astronomico, Cordoba, Argentina 2 Cordoba, Observatorio Astronomico, Argentina 2 Cataluna, Universidad Politecnica 2 Campinas, Universidade Estadual, Brazil 2 Cadiz, Universidad, Cadiz, Spain 2 CONICET, La Plata, Argentina 2 Barcelona, Universidad Central, Spain 2 Barcelona, Universidad Autonoma, Spain 2 Argonne National Laboratory, Argonne 1 Wien Univ., Vienna, Austria 1 Valencia, Universidad Politecnica, Burjasot, Spain 1 Valencia, Universidad Politecnica, Alicante, Spain 1 Valencia, Universidad Literaria, Burjasot, Spain 1 Universidad Nacional, La Plata, Argentina 1 Tartu Univ., Tartu, Estonia 1 Sevilla, Universidad, Seville, Spain 1 Sevilla, Universidad, Cadiz, Spain 1 Sao Paulo Universidade, Brazil 1 Puerto Rico, Universidad, Rio Piedras 1 Porto, Universidade, Oporto, Portugal 1 Polska Akademia Nauk, Centrum 1 Pais Vasco, Universidad, San Sebastian, Spain 1 Padova, Univesita, Padua, Italy 1 Padova, Universita and CNR, Padua, Italy 1 Oriente, Universidad, Cumana, Venezuela 1 Novi Sad, Univerzitet, Novi Sad, Yugoslavia 1 Nanjing, University, Nanjing, Communist China 1 Mons, Univ. de l'Etat, Belgium 1 Messina, UniversitOea, Messina, Italy 1 Madrid, Universidad Politecnica, Spain 1 Madrid, Universidad Compluteuse, Madrid, Spain 1 Madrid, Universidad Complutense, Madrid 1 Madrid, Univ. Politecnica, Spain 1 Madrid, Univ. Complutense 1 Los Andes, Universidad, Merida, Venezuela 1 Los Andes, Universidad, Bogota, Colombia 1 Londrina, Universidade Estadual, Brazil 1 Lisboa, Universdidade Tecnica, Lisbon, Portugal 1 La Plata, Universidad National, Argentina 1 La Plata, Universidad Nacional, La Plata, Argentina 1 La Plata, Universidad Nacional, La Plata 1 La Plata Universidad Nacional CONICET 1 La Plata Univ., Argentina 1 Kumaun Univ., Nainital, India 1 Kumaon University, Naini Tal, India 1 Firenza, Universita, Florence, Italy 1 Ferdowski Univ., Mashad, Iran 1 Ferdowsi Univ., Mashhad, Iran 1 Evora, Universidade, Portugal 1 Crete Univ., Heraklion, Greece 1 Cordoba, Universidad, Cordoba, Spain 1 Cordoba, Universidad Nacional, Cordoba, Argentina 1 Cordoba, Observatorio, Argentina 1 Cordoba, Observatorio Astronomico 1 Cordoba Univ., Observatorio, Argentina 1 Ciadad Univ., Mexico City, Mexico 1 Catalunya, Universitat Politecnica 1 CNRS, St. Genis Laval, France 1 CNR, Laboratorio di Radioastronomia 1 Bureau International de l'Heure 1 Buenos Aires Univ., Argentina 1 Bordeaux I, Universite, Talence, France 17 33 Grenoble I, Universite, Saint-Martin-d'Heres, France 41 Grenoble, Observatoire, Saint-Martin-d'Heres, France 17 Lille I, Universite, Villeneuve-d'Ascq, France 16 Grenoble I, Universite, Saint-Martin-d'Heres, France 14 Montpellier II, Universite, Montpellier, France 11 Aix-Marseille I, Universite, Marseille, France 10 Lille I, Universite, Villeneuve-d'Ascq, Nord, France 8 IRAM, St. Martin d'Heres, France 8 Grenoble I, Universite, Saint-Martin-d'Heres, Isere, France 8 Grenoble I, Universite, Grenoble, France 4 Lille I, Universite, Villeneuve d'Ascq, Nord, France 4 Lille I, Univ., Villeneuve-d'Ascq, France 3 Univ. Joseph Fouier, S' Martin d'Heres, France 3 Lille I, Universite, Villeneuve d'Ascq, France 3 Aix-Marseille III, Universite, Marseille, France 2 Paris X, Universite, Ville-d'Avray, France 2 Lyon I, Universite, Villeurbanne, Rhone, France 2 IRAM, Saint-Martin-d'Here, France 2 College de France, Saint-Vallier, France 1 Paris XI, Universite, Sceaux, Hauts-de-Seine, France 1 Montpelier II, Universite, Montpelier, France 1 Marseille I, Universite, Marseille, France 1 Lille I, Universite, Villeneuve, d'Ascq, France 1 Lille I, Univ., Villeneuve-d'Asqc, France 1 IRAM, S' Martin d'Heres, France 1 Grenoble, Universite, Saint-Martin-d'Heres, Isere, France 1 Grenoble, Observatoire, Saint-Martin-d'Heres 1 Grenoble, Observatoire Saint-Martin-d-Heres, France 1 Grenoble I, Universite, Saint-Martin-d'Heres, Isere 1 Grenoble I, Universite, Saint-Martin-d'Heres, Isee, France 1 Grenoble I, Universite, Saint-Martin-d'Heres 1 Grenoble I, Universite, Saint-Martin d'Heres, Isere 1 Domaine Univ., Saint-Martin, France 1 Aix-Marseille, Universite, Marseille, France 18 19 Andalucia, Instituto de Astrofisica, Granada, Spain 57 Andalucia, Instituto de Astrofisica, Granada, Spain 33 Andalucia, Inst. de Astrofisica, Granada, Spain 3 Andalucia, Inst. de Astrofisica, Granada 2 Instituto Nacional de Astrofisica, Puebla, Mexico 2 Canarias, Instituto de Astrofisica, La Laguna, Spain 2 Andalucia, Inst. de Astrofisica 1 Sabadell, Agrupacion Astronomica, Bilbao, Spain 1 Laboratorio Nacional de Astrofisica, Itajuba, Brazil 1 Instituto de Astronomia, Apartado, Mexico 1 Instituo National de Astrofisica, Puebla, Mexico 1 Inst. Nacional de Astrofisica, Puebla, Mexico 1 Divisao de Astrofisica, INPE, Brazil 1 CSIC, Instituto de Optica, Madrid, Spain 1 CSIC, Inst. de Astrofisica de Andalucia, Granada, Spain 1 CNR, Istituto di Astrofisica Spaziale 1 Armada, Real Instituto y Observatorio, San Fernando, Spain 1 Andalucia, Instituto de Astrofisica, Granada 1 Andalucia, Instituto de Astrofisica, Apartado, Spain 1 Andalucia, Instituto de Astrofisica 19 19 Liege, Universite de l'Etat, Cointe-Ougree, Belgium 21 Liege, Universite de l'Etat, Cointe-Ougree, Belgium 12 Liege, Universite de l'Etat, Belgium 5 Mons, Universite de l'Etat, Belgium 5 Liege, Institut d'Astrophysique, Cointe-Ougree, Belgium 4 Mons, Universite de l'Etat, Mons, Belgium 4 Liege, Universite, Cointe-Sclessin, Belgium 4 Liege, Universite de l'Etat, Ougree, Belgium 4 Katholieke Universiteit Leuven, Heverlee, Belgium 3 Liege, Inst. d'Astrophysique, Belgium 1 Louvain, Universite Catholique, Louvain-la-Neuve, Belgium 1 Liege, Universitede l'Etat, Ougree, Belgium 1 Liege, Universitede l'Etat, Cointe-Ougree, Belgium 1 Liege, Universitede L'Etat, Cointe-Ougree, Belgium 1 Liege, Universite, Ougree-Liege, Belgium 1 Liege, Universite, Cointe-Ourgree, Belgium 1 Liege, Universite, Cointe-Oueree, Belgium 1 Liege, Universite de l'Etat, Cointe-Ougree, Bel 1 Institut d'Astrophysique, Cointe-Ougree, Belgium 1 Antwerpen, Universitaire Instelling, Antwerp, Belgium 20 12 Iowa State University of Science and Technology, Ames 49 Iowa State University of Science and Technology, Ames 13 Iowa State University of Science and Technology, Ames, Iowa 13 China Center for Advanced Science and Technology, Beijing 12 Iowa State University of Science and Technology, Ames, IA 10 Iowa State Univ. of Science and Technology, Ames 8 China Center for Advanced Science and Technology 1 Univ. of Science and Technology of China 1 Manchester Univ. Inst. of Science and Technology, United Kingdom 1 Iowa State University of Science and Technology, AMES 1 Iowa State University of Science and Technology 1 China Center of Advanced Science and Technology, Beijing 1 Anambra State University of Technology, Awka 21 43 ISRO Satellite Centre, Bangalore, India 39 Raman Research Institute, Bangalore, India 21 ISRO Satellite Centre, Bangalore, India 17 Valencia Univ., Burjasot, Spain 16 Vainu Bappu Observatory, Kavalur, India 11 IBM Almaden Research Center, San Jose, CA 11 Bhabha Atomic Research Centre, Srinagar, India 8 Raman Research Institute, Bangalore 560080, India 7 Brockport State College, Brockport, NY 6 Valencia Univ., Burjassot, Spain 6 Raman Research Inst., Bangalore, India 5 Jadavpur Univ., Calcutta, India 4 ISRO, Satellite Centre, Bangalore, India 4 Bhabha Atomic Research Centre, Bombay, India 3 Vainu Bappu Observatory, Alangayam, India 3 Radio Astronomy Centre, Ootacamund, India 3 IBM Scientific Center, Palo Alto, CA 3 Brockport State College, Brockport, N.Y. 2 The University of Calgary, Calgary, Canada 2 Space Research Centre, Warsaw, Poland 2 Research Centre of Crete 2 Raman Research Institute, Bangalore 560 080, India 2 IBM Scientific Center, Palo Alto, Calif. 2 IBM Italia S.p.A., Rome, Italy 1 Valencia, Univ., Burjasot, Spain 1 Valencia, Univ. Burjasot, Spain 1 Univ. degli Studi, Catania, Italy 1 Udaipur Solar Observatory, India 1 U.S. Naval Academy, Annapolis, Md. 1 St. Patrick's College, Maynooth, Ireland 1 Spicer Memorial College, India 1 Space Research Center, Warsaw, Poland 1 ST Systems, Inc., Lanham, MD 1 SRON, Space Research Laboratory 1 Raman Reseach Inst., Bangalore, India 1 Nehru Planetarium, Ludhiana, India 1 Modern School, Calcutta, India 1 Kentucky, Centre College, Danville 1 IUE Observatory, Lanham, MD 1 ISRO Satellite Center, Bangalore, India 1 ESO, Casilla 19001, Santiago 19, Chile 1 Delhi Univ., Delhi, India 1 Chemical Centre, Lund, Sweden 1 B. N. Mahavidyalaya, Hooghly, India 22 16 CSIRO, Australia Telescope National Facility, Epping 57 Australia Telescope National Facility, Epping 22 CSIRO, Australia Telescope National Facility, Epping 14 Australia Telescope National Facility, Epping, Australia 11 Australia Telescope National Facility, Epping, NSW, Australia 3 The Australia Telecope National Facility, Epping, Australia 3 CSIRO, Australia Telescope National Facility, Parkes 3 Australia Telescopes National Faciltiy, Epping, Australia 3 Australia Telescope National Facility, Parkes 2 Australian Telescope National Facility, Epping, Australia 2 Australia Telescope National Facility, Narrabri 1 CSIRO, Australia Telescope, Epping 1 Australia Telescope, Epping, Australia 1 Australia Telescope National Facility, Parkes, Australia 1 Australia Telescope National Facility, Narrabri, Australia 1 Australia Telescope National Facility, Narrabi 1 Australia Telescope National Facility, Epping NSW, Australia 23 10 South African Astronomical 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Wales, Australia 1 Australia Telescope National Facility, CSIRO, PO Box 76, Epping NSW 2121, Australia 1 Australia Telescope National Facility, CSIRO, PO Box 76 Epping, NSW 2121, Australia 1 Australia Telescope National Facility, CSIRO, Epping, Australia 1 Australia Telescope National Facility CSIRO, PO Box 76, Epping NSW2121, Australia 28 13 Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia 21 Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia 11 Anglo-Australian Observatory, Coonabarabran, Australia 9 Anglo-Australian Observatory, Sydney, Australia 8 Anglo-Australian Observatory, PO Box 296, Epping, NSW2121, Australia 3 Anglo-Australian Observatory, PO Box 296, Epping NSW 2121, Australia 2 Anglo-Australian Observatory, PO Box 296 Epping, NSW 2121, Australia 2 Anglo-Australian Observatory, Coonabarabran, NSW 2357, Australia 1 Anglo-Australian Observatory, PO Box 296, Epping 2121, Australia 1 Anglo-Australian Observatory, P.O. Box 296, Epping NSW 2121, Australia 1 Anglo-Australian Observatory, Epping, Aust 1 Anglo-Australian Observatory, Epping Laboratory, PO Box 296, Epping, NSW, 2121, Australia 1 Anglo-Australian Observatory, Epping Laboratory, PO Box 296, Epping, NSW 2121, Australia 1 Anglo-Australian Observatory, Epping Laboratory, PO Box 296, Epping NSW 2121, Australia 29 11 Czech Academy of Sciences, Astronomical Inst., Ondrejov, Czech Republic 13 Czech Academy of Sciences, Astronomical Inst., Ondrejov, Czech Republic 6 Academy of Sciences of Czech Republic, Ondrejov, Czech Republic 5 Academy of Sciences of the Czech Republic, Ondrejov, Czech Republic 2 Uzbek Academy of Sciences, Astronomical Inst., Tashkent, Uzbekistan 2 Slovak Academy of Sciences, Astronomical Institute, Bratislava, Czechoslovakia 2 Czechoslovak Academy of Sciences, Astronomical Inst., Ondrejov, Czechoslovakia 2 Czech Academy of Sciences, Ondrejov, Czech Republic 1 Slovak Academy of Sciences, Astronomical Inst., Tatranska Lomnica, Slovakia 1 Czechoslovak Academy of Sciences, Astronomical Institute, Ondrejov, Czechoslovakia 1 Czech Academy of Sciences, Sporilov, Czech Republic 1 Czech Academy of Sciences, Astronomical Inst., Prague, Czech Republic 30 10 Ceskoslovenska Akademie Ved, Astronomicky Ustav, Ondrejov, Czechoslovakia 19 Ceskoslovenska Akademie Ved, Astronomicky Ustav, Ondrejov, Czechoslovakia 9 Ceskoslovenska Akademie Ved, Astronomicky Ustav, Prague, Czechoslovakia 4 Slovenska Akademia Vied, Astronomicky Ustav, Tatranska Lomnica, Czechoslovakia 3 Slovenska Akademia Vied, Astronomicky Ustav, Bratislava, Czechoslovakia 1 Slovenska Akademiia Vied, Astronomicky Ustav, Tatranska Lomnica, Czechoslovakia 1 Slovenska Akademiia Vied, Astronomicky Ustav, Bratislava, Czechoslovakia 1 Ceskoslovenska Akademie Ved, Fyzikalni Ustav, Rez, Czechoslovakia 1 Ceskoslovenska Akademie Ved, Fyzikalni Ustav, Prague, Czechoslovakia 1 Ceskoslovenska Akademie Ved, Astronomicky Ustav, Tatranska Lomnica, Czechoslovakia 1 Ceskolovenska Akademie Ved, Astronomicky Ustav, Ondrejov, Czechoslovakia 31 5 Royal Greenwich Observatory, Santa Cruz de la Palma, Spain 30 Royal Greenwich Observatory, Santa Cruz de la Palma, Spain 12 Royal Greenwich Observatory, Herstmonceux, East Sussex, England 9 Royal Greenwich Observatory, Santa Cruz de La Palma, Spain 2 La Palma Observatory, Santa Cruz de la Palma, Spain 1 Nordic Optical Telescope, Santa Cruz, de La Palma, Spain 32 176 Universitat de Barcelona, Barcelona, Spain 42 The Citadel, Charleston, SC 24 Universidad de Los Andes, Merida, Venezuela 22 University of Toronto, Toronto, Ontario, Canada 22 Universite de Montreal, Montreal, Quebec, Canada 18 Institut d'Estudis Catalans, Spain 16 Universitat de Barcelona, Barcelona, Spain 15 Institut d'Estudis Catalans, Barcelona, Spain 14 University of Bristol, Bristol, UK 13 University of New Hampshire, Durham, NH, US 13 Universidad de Puerto Rico, Rio Piedras 13 Universidad Complutense, Madrid, Spain 13 Universidad Central de Venezuela, Caracas 12 Universita di Firenze, Firenze, Italy 11 University of Oxford, Oxford, UK 11 Universidad de Puerto Rico, Rio Piedras, PR 11 Aichi University of Education, Kariya, Japan 10 University of Durham, Durham, UK 10 Univ. de Valencia, Valencia, Spain 10 Cataluna, Universidad Politecnica, Barcelona, Spain 9 University of Rochester, Rochester, NY, US 9 University of Leicester, Leicester, UK 8 Universite de Montreal, Montreal, Canada 8 Universite Paris-Sud, Orsay, France 8 Universidad de los Andes, Merida, Venezuela 8 Univ. de Cantabria, Santander, Spain 8 Univ. de Barcelona, Barcelona, Spain 8 Societat Catalana de Fisica, Spain 8 Barcelona, Universidad Central, Barcelona, Spain 7 University of Waterloo, Waterloo, Ontario, Canada 7 Inst. d'Estudis Catalans, Spain 6 University of Kentucky, Lexington, KY, US 6 Universitat Wurzburg, Wurzburg, Germany 6 Universidad Complutense de Madrid, Madrid, Spain 6 Inst. d'Estudis Catalans, Barcelona, Spain 6 Ege University Observatory, Bornova, Turkey 5 University of Notre Dame, Notre Dame, IN, US 5 University of Manchester, Cheshire, UK 5 University of Hawaii, Honolulu, Hawaii, US 5 University of Cape Town, Cape Town, South Africa 5 Universitat de les Illes Balears, Palma de Mallorca, Spain 5 Universitat Heidelberg, Heidelberg, Germany 5 Universidade Federal Fluminense, Niteroi, Brazil 5 Univ. of Birmingham, Birmingham, UK 5 Univ. Nacional de La Plata, La Plata, Argentina 4 University of North Carolina, Chapel Hill, NC, US 4 University of Manchester, Macclesfield, UK 4 University of Cambridge, Cambridge, UK 4 Universite Paris 11, Orsay, France 4 Univ. degli Studi di Milano, Milano, Italy 4 The University of Toledo, Toledo, OH, US 4 Inst. de Fisica Corpuscular, Burjasot, Spain 4 Barcelona, Universidad Politecnica, Barcelona, Spain 3 University of Vienna, Vienna, Austria 3 University of Sussex, Brighton, UK 3 University of Manchester, Manchester, UK 3 University of Hawaii at Manoa, Honolulu 3 University of Alabama, Tuscaloosa, Alabama, US 3 Universiteit Leuven, Heverlee, Belgium 3 Universitat de Valencia, Burjassot, Spain 3 Universitat Politecnica de Catalunya, Barcelona, Spain 3 Universitat Basel, Binningen, Switzerland 3 Universita' di Firenze, Florence, Italy 3 Universita di Napoli Federico II, Napoli, Italy 3 Universita degli Studi di Milano, Milano, Italy 3 Universidade Federal do Rio Grande do Sul, Brazil 3 Universidad de la Republica, Montevideo, Uruguay 3 Universidad Simon Bolivar, Caracas, Venezuela 3 IUE Observatory, Villafranca, Spain 2 Yebes, Centro Astronomico, Spain 2 University of the Pacific, Stockton, CA 2 University of Trondheim, Dragvoll, Norway 2 University of Tasmania, Hobart, Australia 2 University of Sydney, NSW, Australia 2 University of Southampton, Highfield, UK 2 University of Queensland, Queensland, Australia 2 University of Pennsylvania, Philadelphia, PA, US 2 University of Patras, Patras, Greece 2 University of Oregon, Eugene, Oregon, US 2 University of Leicester, Leicester, England, UK 2 University of Kansas, Lawrence, Kansas, US 2 University of Iceland, Reykjavik, Iceland 2 University of Garyounis, Benghazi, Libya 2 University of Firenze, Firenze, Italy 2 University of Delhi, New Delhi, India 2 University of Chicago, Williams Bay, WI, US 2 University of Chicago, Chicago, Illinois, US 2 University of Birmingham, Birmingham, UK 2 University of Athens, Athens, Greece 2 University of Aarhus, Arhus, Denmark 2 Universite Paris XI, Orsay, France 2 Universitat Erlangen-Nurnberg, Bamberg, Germany 2 Universitat Erlangen-Nuernberg, Bamberg, Germany 2 Universitaets-Sternwarte, Munich 2 Universitaets-Sternwarte, Jena 2 Universitaet der Wien, Wien, Austria 2 Universitaet Dortmund, Dortmund, Germany 2 Universidad de los Andes, Bogota, Colombia 2 Universidad Veracruzana, Jalapa, Mexico 2 Univ. de Valencia, Burjassot, Spain 2 Univ. de Paris Sud, Orsay, France 2 Univ. Libre de Bruxelles, Bruxelles, Belgium 2 Univ. Autonoma de Madrid, Madrid, Spain 2 Societat Catalana de Fisica, Barcelona, Spain 2 Observatorio de la Armada, San Fernando, Spain 2 IRAM Granada, Granada, Spain 2 Catalunya, Univ. Politecnica, Barcelona, Spain 2 Barcelona, Universidad Autonoma, Barcelona, Spain 1 Valencia Universidad Literaria, Burjasot, Spain 1 University of Zurich, Zurich, Switzerland 1 University of Wyoming, Laramie, Wyoming, US 1 University of Waikato, Hamilton, New Zealand 1 University of Thessaloniki, Thessaloniki, Greece 1 University of Tasmania, Tasmania, Australia 1 University of Sydney, Sydney, Australia 1 University of Stockholm, Stockholm, Sweden 1 University of Sri Lanka, Colombo, Sri Lanka 1 University of South Carolina, Aiken, SC, US 1 University of Sidney, Sidney, Australia 1 University of Science of Malaysia, Penang 1 University of Puerto Rico, Rio Piedras 1 University of Puerto Rico, Mayaguez 1 University of Palermo, Palermo, Italy 1 University of North Alabama, Florence, AL, US 1 University of New Orleans, New Orleans, LA, US 1 University of Nevada, Las Vegas, Nevada, US 1 University of Manchester, Manchester, England, UK 1 University of Florence, Firenze, Italy 1 University of Edinburgh, Edinburgh, UK 1 University of Delaware, Newark, Delaware, US 1 University de Montreal, Montreal, Canada 1 Universitetets Observatorium, Tollose, Denmark 1 Universitetet i Tromso, Tromso, Norway 1 Universite dr Montreal, Montreal, Canada 1 Universite de Montreal, Montreal, Quebeca, Canada 1 Universite Libre de Bruxelles, Brussels, Belgium 1 Universite Laval, Sainte-Foy, Quebec, Canada 1 Universite Laval, Sainte-Foy 1 Universitatsplatz, Graz, Austria 1 Universitat de Valencia, Burjassot, Valencia, Spain 1 Universitat Wuerzburg, Wuerzburg, Germany 1 Universitat Innsbruck, Innsbruck, Austria 1 Universitaets-Sternwarte 1 Universitaet Wuerzburg, Wuerzburg, Germany 1 Universita di Triesta, Tiepolo, Trieste, Italy 1 Universita di Ferrara, Ferrara, Italy 1 Universita della Calabria, Cosenza, Italy 1 Universita degli Studi Milano, Milano, Italy 1 Universidade de Sisboa, Lisboa, Portugal 1 Universidade Federal Rio, Grande do Sul, Brazil 1 Universidade Estadual Paulista, Sao Paolo, Brazil 1 Universidad del Pais Vasco, Bilbao, Spain 1 Universidad de Sevilla Apartado, Sevilla, Spain 1 Universidad de Guanajuato, Guanajuato, Mexico 1 Universidad de Cantabria, Universidad, Santander, Spain 1 Universidad Politecnica de Barcelona, Barcelona, Spain 1 Universidad Nacional de Colombia, Bogota 1 Univ. of Calgary, Calgary, Alberta, Spain 1 Univ. degli Studi, Bologna, Italy 1 Univ. degli Stidu di Milano, Milano, Italy 1 Univ. de Valencia, Burjassot, Valencia, Spain 1 Univ. de Extremadura, Badajoz, Spain 1 Univ. de Alcala de Henares, Madrid, Spain 1 Univ. Politecnica de Catalunya, Barcelona, Spain 1 Univ. Nacional de la Plata, La Plata, Argentina 1 Univ de Barcelona, Barcelona, Spain 1 The University of Manchester, Manchester, UK 1 Planetario de Madrid, Madrid, Spain 1 Palma de Mallorca, Universidad, Spain 1 Observatorio Fabra, Barcelona, Spain 1 Madrid, Universidad Autonoma, Canto Blanco, Spain 1 Inst. Fuente de San Luis, Valencia, Spain 1 Inst. Alvaro de Mendala, Ponferrada, Spain 1 Facultad de Ciencias, Salamanca, Spain 1 ESA, Apartado, Madrid, Spain 1 Catalunya, Universitat Politecnica, Barcelona, Spain 1 Barcelona, Univ. Autonoma, Spain 33 11 Ecole Polytechnique, Palaiseau, Essonne, France 27 Ecole Polytechnique, Palaiseau, Essonne, France 25 Paris XI, Universite, Orsay, Essonne, France 10 Inst. d'Astrophysique Spatiale, Orsay, France 3 Laboratoire Rene Bernas, Orsay, Essonne, France 3 Ecole Polytechnique, Palaiseau, Essonne 3 Ecole Polytechnique, Palaiseau 3 Centre de Physique Theorique, Palaiseau, France 2 Polytechnic of Wales, Pontypridd 2 CNRS, Verrieres-le-Buisson, Essonne, France 1 Societe Jobin et Yvon, Longjumeau, Essonne, France 1 Paris XI, Orsay, Essonne, France 34 21 College of the Holy Cross, Worcester, MA 15 College of the Holy Cross, Worcester, MA 15 Ball Aerospace Systems Group, Boulder, CO 10 Univ. of Leicester, Leicester, UK 7 Berkeley Research Associates, CA 5 College of William and Mary, Williamsburg, Va. 4 College of William and Mary, Williamsburg, VA 3 Univ. of Manchester, Manchester, UK 3 Mees Observatory, Rochester, NY 3 College Hill, Armagh, N. Ireland, UK 1 Univ. College of Cardiff, Cardiff, Wales, UK 1 Rochester Inst. of Tech., Rochester, NY, US 1 General Dynamics Corp., Pomona, CA 1 Digital Systems Group, Inc., Warminster, PA 1 College of New Caledonia, Prince George, Canada 1 College of Charleston, Charleston, SC, US 1 City College of New York, New York, NY, US 1 Charles Hayden Planetarium, Boston, MA 1 Cascade Applied Sciences, Boulder, CO 1 C. E. K. Mees Observatory, Rochester, NY 1 Ball Aerospace Systems, Boulder, CO 1 AT&T Bell Laboratories, Morristown, NJ 35 14 Multiple Mirror Telescope Observatory, Tucson, AZ 59 Multiple Mirror Telescope Observatory, Tucson, AZ 21 Whipple Observatory, Amado, AZ 7 Planetary Science Inst., Tucson, AZ 5 Millimeter Wave Observatory, Austin 5 Fred Lawrence Whipple Observatory, Amado, AZ 3 Multiple Mirror Telescope Observatory, Tucson, AZ, US 3 Multiple Mirror Telescope Observatory 3 Maria Mitchell Observatory, Nantucket, MA 3 F.L. Whipple Observatory, Amado, AZ 1 Purple Mountain Observatory, Nanjing 1 Millimeter Wave Observatory, Austin, Tex. 1 Millimeter Wave Observatory, Austin, TX 1 Hopkins Phoenix Observatory, Phoenix, AZ 1 Caltech Submillimeter Observatory, Hilo, HI 36 223 Strasbourg, Observatoire, Strasbourg, France 915 Paris, Observatoire, Meudon, France 547 Lick Observatory, Santa Cruz, CA 441 Palomar Observatory, Pasadena, CA 188 Washburn Observatory, Madison, WI 166 Marseille, Observatoire, France 166 Lowell Observatory, Flagstaff, AZ 126 Nice, Observatoire, Nice, France 118 Haystack Observatory, Westford, MA 109 Marseille, Observatoire, Marseille, France 83 Strasbourg, Observatoire, France 79 Armagh Observatory, Northern Ireland 75 Paris, Observatoire, France 67 IUE Observatory, Madrid, Spain 65 Grenoble, Observatoire, France 61 Dyer Observatory, Nashville, TN 58 Washburn Observatory, Madison, Wis. 51 Strasbourg, Observatoire, Strasbourg, France 49 Arecibo Observatory, Arecibo, PR 46 Wise Observatory, Tel Aviv, Israel 43 Besancon, Observatoire, France 37 Lick Observatory, Santa Cruz 36 Lowell Observatory, Flagstaff, Ariz. 34 Besancon, Observatoire, Besancon, France 26 Tuorla Observatory, Piikkio, Finland 25 Allegheny Observatory, Pittsburgh, PA 20 Bordeaux, Observatoire, Floirac, France 20 Arecibo Observatory, Arecibo, P.R. 18 Warsaw Univ. Observatory, Warszawa, Poland 17 Toulouse, Observatoire, France 16 U.S. Naval Observatory, Flagstaff, AZ, US 16 Carnegie Observatories, Pasadena, CA, US 15 Strasbourg, Observatoire Astronomique, France 15 Palomar Observatory, Pasadena, CA, US 14 Toulouse, Observatoire, Toulouse, France 14 Roma, Osservatorio Astronomico, Rome 13 Trieste, Osservatorio Astronomico 13 Palomar Observatory, Pasadena 13 ESA IUE Observatory, Madrid, Spain 13 Arcetri, Osservatorio Astrofisico 11 Van Vleck Observatory, Middletown, Conn. 11 U.S. Naval Observatory, Washington 11 Onsala Space Observatory, Goteborg, Sweden 11 Corralitos Observatory, Las Cruces, NM 11 Biruni Observatory, Shiraz, Iran 10 Vatican Observatory, Vatican City State 10 National Observatory, Athens, Greece 10 Cote d'Azur, Observatoire, Nice, France 9 Univ. Joseph Fourier, Grenoble, France 9 Dyer Observatory, Nashville, Tenn. 8 Sproul Observatory, Swarthmore, Pa. 8 Sproul Observatory, Swarthmore, PA 8 Royal Observatory, Edinburgh, UK 8 MIT Haystack Observatory, Westford, MA, US 8 Haystack Observatory, Westford, MA, US 8 Braeside Observatory, Flagstaff, AZ, US 8 Arecibo Observatory, Arecibo, Puerto Rico 7 Madrid, Observatorio Astronomico, Spain 7 Hale Observatories, Pasadena, CA 6 Royal Observatory, Scotland 6 Paul Wild Observatory, Narrabri, Australia 6 Nordlyobservatoriet, Tromso, Norway 6 Catania, Osservatorio Astrofisico 5 Turku Univ. Observatory, Piikkio, Finland 5 National Radio Observatory, Socorro, NM, US 5 Marseille, Observatoire, Marseille 5 Bologna, Osservatorio Astronomico 4 Washburn Observatory, Madison, WI, US 4 Warsaw Univ. Observatory, Warsaw, Poland 4 Strada dell'Osservatorio, Torinese, Italy 4 Nordlysobservatoriet, Tromso, Norway 4 Landis Observatory, Locust Grove, GA 4 Landis Observatory, East Point, Ga. 4 Cote d'Azur, Observatoire, Grasse, France 4 Bradley Observatory, Decatur, GA 3 Yale Southern Observatory, San Juan, Argentina 3 Vicolo Osservatorio, Padova, Italy 3 Roma, Osservatorio Astronomico 3 Prairie Observatory, Urbana, Ill. 3 Paris-Meudon Observatory, Meudon, France 3 Palomar Observatory, Caltech 105-24 3 Lyon, Observatoire, Lyons, France 3 Lowell Observatory, Flagstaff 3 Fairborn Observatory, Mesa, AZ 3 Ege Univ. Observatory, Bornova, Turkey 3 Dunsink Observatory, Castleknock, Ireland 3 Dearborn Observatory, Evanston, IL 3 DEMIRM, Observatoire de Paris, Paris, France 3 Auroral Observatory, Tromso, Norway 3 Armagh Observatory, Northern Ireland, UK 3 Armagh Observatory, Armagh, uk 3 Armagh Observatory, Armagh, UK 3 Arcetri, Osservatorio, Florence, Italy 2 Vicolo dell'Osservatorio, Padova, Italy 2 Univ. Paul Sabatier, Toulouse, France 2 Univ. Louis Pasteur, Strasbourg, France 2 Strawbridge Observatory, Haverford, PA 2 Strasbourg, Astronomical Institute, France 2 Royal Belgian Observatory, Brussels, Belgium 2 Pulkova Observatory, Russia 2 Pic-du-Midi et Toulouse, Observatoire, Toulouse, France 2 Paris Observatoire, Meudon, France 2 Observatoire Astronomique-URA, Strasbourg, France 2 Mt. Stromlo Observatory, Canberra, Australia 2 Mees Observatory, Rochester, N.Y. 2 Laserdot, Marcoussis, France 2 Infrared Observatory, Laramie 2 Felix Aguilar Observatory, San Juan, Argentina 2 Centre de Donnees de Strasbourg, Strasbourg, France 2 Bosscha Observatory, Bandung, Indonesia 2 Bordeaux, Observatoire, France 2 Biruni Observatory, Shiraz 2 Alger, Observatoire, Algeria 1 Washburn Observatory, Madison. WI 1 Washburn Observatory, Madison 1 Vicolo dell' Osservatorio, Padova, Italy 1 Vicolo Osservatorio, Padua, Italy 1 Vatican Observatory Research Group 1 Vassar College Observatory, Poughkeepsie 1 Univ. of Warsaw Observatory, Warsaw, Poland 1 Univ. Jospeh Fourier, Grenoble, France 1 Tuorla Observatory, Tuorla, Spain 1 Tuorla Observatory, Piikio, Finland 1 Tuorla Observaoty, Piikkio, Finland 1 Torun, Obserwatorium Astronomiczne, Poland 1 Torino, Osservatorio Astronomico 1 Tallinn Observatory, Tallinn, Estonia 1 Strassbourg, Observatoire, France 1 Strasbourg, Observatoire Astronomique, Strasbourg, France 1 Strasbourg, Observatoire Astronomique 1 Strasbourg I, Univ., France 1 Siding Spring Observatory, Canberra, Australia 1 Shenandoah Observatory, Southport, CT 1 Shaanxi Observatory, Lintong, China 1 Scuppernong Observatory, Waukesha, Wis. 1 Royal Observatory Edinburgh, Scotland 1 Radio Observatory, Columbus, OH 1 Radio Observatory, Ann Arbor, Mich. 1 Radio Observatory, Ann Arbor, MI 1 Polomar Observatory, Pasadena, CA 1 Perth Observatory, Australia 1 Paul Wild Observatory, Narrabri 1 Parkes Observatory, Parkes, NSW, Australia 1 Paris, Observatory, Meudon, France 1 Paris, Observatorie, Meudon, France 1 Paris, Observatoire, Nancay, Cher, France 1 Paris, Ob servatoire, Meudon, France 1 Paris VI, Observatoire, France 1 Palomar Observatory, San Diego, CA 1 Palomar Observatory, Pasadena,CA 1 Observatorie Astronomique, Strasbourg, France 1 Nice, Obervatoire, Nice, France 1 Moore Observatory, Crestwood, KY 1 Mont-Megantic, Observatoire, Montreal, Canada 1 Mont Megantic, Observatoire Astronomique 1 Milano, Osservatorio Astronomico, Merate 1 Marseille, Observatorie, France 1 Marseille, Observatoire Marseille 1 Marseille Observatoire, Marseille, France 1 Marseille Observatoire, Marseille 1 Madrid, Observatorio Astronomico 1 Louth Observatory, Sedro Woolley, WA 1 Louth Observatory, Sedro Wooley, Wash. 1 Louth Observatory, Sedro Wooley, WA 1 Lines Observatory, Mayer, AZ 1 Lick, Observatory, Santa Cruz, CA 1 Lick Observatory, Santa Cruz, AZ 1 Landis Observatory, McDonough, GA, US 1 La Plata, Observatorio Astronomico 1 Klamath Observatory, Somes Bar, CA 1 Kandilli Observatory, Istanbul, Turkey 1 Infrared Observatory, Laramie, WY 1 IUE Observatory, Seabrook, MA 1 IUE Observatory, Madrid Spain 1 Hvar Observatory, Zagreb, Croatia 1 Hopkins Observatory, Williamstown, Mass. 1 Grenoble, Observatoire, Grenoble 1 Grenoble Observatoire, France 1 Five College Observatory, Amherst, Mass. 1 Fick Observatory, Ames, Iowa 1 Fairborn Observatory, Scottsdale, AZ 1 Fairborn Observatory, Phoenix, AZ 1 European Science Foundation, Strasbourg, France 1 ESA-IUE Observatory, Villafranca, Spain 1 ESA-IUE Observatory, Madrid, Spain 1 ESA-IUE Observatorio, Madrid, Spain 1 ESA, IVE Observatory, Madrid, Spain 1 ESA, IUE Observatory, Madrid, Spain 1 E.W. Fick Observatory, Ames, Iowa 1 Dunsink Observatory, Castlenock, Ireland 1 Dearborn Observatory, Evanston, Ill. 1 Cote-d'Azur, Observatoire, Nice, France 1 Cote-d'Azur, Observatoire, Caussols, France 1 Corralitos Observatory, Las Cruces, N. Mex. 1 College Observatory, Danbury, CT 1 Cisi-Ingenierie, Valbonne, France 1 Carnegie Observatories, Santa Barbara, CA, US 1 Carnegie Observatories, Pasedena, CA, US 1 Carnegie Observatories, Pasadena, CA 1 Capodimonte, Osservatorio Astronomico, Italy 1 Calern, Observatoire, Saint-Vallier 1 Calern, Observatoire, Saint Vallier-de-Thiey, France 1 Calern, Observatoire, Saint Vallier-de-Thiey 1 Calar Alto Observatory, Spain 1 Buruni Observatory, Shiraz, Iran 1 Brera, Osservatorio Astronomico 1 Bordeaux, Observatoire, Floriac, France 1 Bordeaux Univ., Observatoire, France 1 Bordeaux I, Observatoire, Floirac, France 1 Bologna, Osservatorio Astronomico Italy 1 Besancon Observatoire, France 1 Besancon Observatoire, Besancon, France 1 Besanccon, Observatoire, France 1 Bensancon, Observatoire, Besancon, France 1 Baja Observatory, Hungary 1 BNM-LPTF, Paris Observatory, 75014 Paris, France 1 Astronomical Observatory of Strasbourg, Strasbourg, France 1 Armagh Observatory, Armagh, N. Ireland 1 Armagh Observatory, Armagh, Ireland 1 Arecibo Observatory, Arecibo PR 1 Arecibo Observatory, Arceibo, P.R. 1 Arcetri, Osservatorio Astrofisico, Florence 1 Arcetri, Osservatorio Astrofisico, Flor 1 Arcetri Osservatorio Astrofisico 37 83 Main Astronomical Observatory, Goloseevo, Ukraine 23 Tartu Astrophysical Observatory, Toravere, Estonia 14 Radio Astronomy Observatory, Ann Arbor, MI 13 National Astronomical Observatory, Mitaka, Tokyo, Japan 11 Maria Mitchell Observatory, Nantucket, MA, US 11 Beijing Astronomical Observatory, China 10 State Astronomical Inst., Moscow, Russia 9 Radio Astronomy Observatory, Ann Arbor, Mich. 9 Beijing Astronomical Observatory, Beijing, China 8 National Astronomical Observatory, Mizusawa, Japan 8 Big Bear Solar Observatory, Pasadena, Calif. 7 Radio Astronomy Observatory, Austin, Tex. 6 National Astronomical Observatory of Japan, Tokyo, Japan 6 Main Astronomical Observatory, Goloseevo, Ukraine 5 Tokyo Astronomical Observatory, Japan 5 Special Astrophysical Observatory, Zelenchukskaya, Russia 5 Korea Astronomy Observatory, Daejon, Korea 4 State Astronomical Institute, Moscow, Russia 4 National Astronomical Observatory, Sofia, Bulgaria 4 National Astronomical Observatory of Japan, Mitaka 4 Mount Hopkins Observatory, Amado, Ariz. 4 Copenhagen Univ. Observatory, Tollose, Denmark 4 Astronomical Observatory, St. Petersburg, Russia 3 Vilnyus Astronomical Observatory, Vilnyus, Lithuanian SSR 3 National Astronomical Observatory, Mitaka, Tokyo 181, Japan 3 National Astronomical Observatory of Japan, Mitaka, Japan 3 Mount Laguna Observatory, San Diego, CA 2 Yunnan Astronomical Observatory, Kunming 650011, China 2 Tokyo Astronomical Observatory, Tokyo, Japan 2 State Astronomical Inst., Nauchny, Ukraine 2 Sapporo Meteorological Observatory, Japan 2 Nat. Radio Astronomy Observatory, Socorro, NM, US 2 Mount Stromlo Observatory, Canberra, Australia 2 Main Astronomical Observatory of Academy of Sciences, Kiev, Ukraine 2 Crimean Astrophysical Observatory, Crimea, Nauchni, Ukraine 2 Beijing Astronomical Observatory, Beijing 100080, PR China 2 Astrophysical Observatory, Asiago, Italy 2 Astronomical Observatory, Copenhagen, Denmark 2 Anglo-Australian Observatory, Australia 1 Trieste, Astronomical Observatory, Italy 1 Tokyo Astronomical Observatory, Nagano, Japan 1 Tokyo Astronomical Observatory, Mitaka, Tokyo, Japan 1 Tokyo Astronomical Observatory, Mitaka 1 The Prinicpal Observatory of Ukraine, Kiev, Ukraine 1 Tartu Astrophysical Observatory, Toravere, Estonian SSR 1 Tartu Astrophysical Observatory, Toravere, EE-2444, Estonia 1 Tartu Astrophysical Observatory, Tartu, Estonia 1 Tartu Astrophysical Observatory, EE2444 Toravere, Estonia 1 Tartu Astrophysical Observatory, EE-2444 Toravere, Estonia 1 Rozhen National Astronomical Observatory, Smoljan, Bulgaria 1 Radio Astronomy Observatory, Pushchino, USSR 1 Padua Astronomical Observatory, Italy 1 NishiHarima Astronomical Observatory, Hyogo, Japan 1 National Astronomy Observatory, Mitaka, Japan 1 National Astronomical Observatory, Smolyan, Bulgaria 1 National Astronomical Observatory, Mizusawa, Iwate, Japan 1 National Astronomical Observatory, Mitana, Tokyo, Japan 1 National Astronomical Observatory, Mitaka 1 National Astronomical Observatory, Minamimaki, Nagano, Japan 1 National Astronomical Observatory, Japan 1 National Astronomical Observatory Rozhen, Smolyan, Bulgaria 1 National Astronomical Observataory, Mitaka, Japan 1 Nat. Radio Astron. Observatory, Socorro, NM, US 1 Nat. Optical Astronomical Observatories, La Serena, Chile 1 Mount Stromlo Observatory, Weston Creek, Australia 1 Maria Mitchell Observatory, Nantucket, Mass. 1 Main Astronomical Observatory, Pulkovo, Russia 1 Main Astronomical Observatory, Golosiiv, 252127 Kiev, Ukraine 1 Korea Astronomy Observatory, Yusong-ku, Korea 1 Korea Astronomy Observatory, Taejeon, Korea 1 Korea Astronomy Observatory, Daejeon, Korea 1 Heliophysical Observatory, Debrecen, Hungary 1 Etwin W. Fick Observatory, Ames, Iowa 1 Daeduk Radio Astronomy Observatory, Daejun, Korea 1 Crimean Astrophysical Observatory, Nauchnyi, Crimea, Ukraine 1 Crimean Astrophysical Observatory, Nauchny, Crimea, Ukraine 1 Byurakan Astronomical Observatory, Armenia 1 Belgrade, Astronomical Observatory, Yugoslavia 1 Beijing Astronomical Observatory, CAS 1 Astronomical Observatory, Prague, Czech Republic 1 Astronomical Observatory of Trieste, Trieste, Italy 1 Astronomical Observatory of Padova, Padova, Italy 1 Astronomical Latitude Observatory, Kornik, Poland 1 Anglo-Australian Observatory, Coonabarabran 38 73 Tokyo Institute of Technology, Tokyo, Japan 32 Institute of Astronomy, Cambridge, UK 15 Tokyo Institute of Technology, Tokyo, Japan 8 Helsinki University of Technology, Espoo, Finland 8 Chalmers University of Technology, Goteborg, Sweden 7 Tokyo Inst. of Technology, Meguro, Tokyo, Japan 7 Institute of Astronomy, Zurich, Switzerland 6 Helsinki Univ. of Technology, Kylmala, Finland 6 Communications Research Laboratory, Tokyo, Japan 5 Tokyo Metropolitan Univ., Tokyo, Japan 5 Lund Institute of Technology, Lund, Sweden 5 Helsinki University of Technology, Kylmala, Finland 5 Helsinki Univ. of Technology, Espoo, Finland 4 Osaka University of Education, Osaka, Japan 4 Helsinki University of Technology, Esbo, Finland 4 Communications Research Lab., Tokyo, Japan 3 Tokyo Metropolitan University, Tokyo, Japan 3 Tokyo Metropolitan Univ., Hachioji, Japan 3 Tokyo Gakugei Univ., Koganei, Tokyo, Japan 3 New Jersey Institute of Technology, Newark, NJ, US 3 Kanazawa Institute of Technology, Nonoichi, Japan 3 Insititute of Technology, Cambridge, MA, 02139 3 Georgia Inst. of Technology, Atlanta 3 Fuji Research Inst. Corp., Tokyo, Japan 2 Yukawa Inst., Kyoto Univ., Kyoto, Japan 2 Tokyo Metropolitan University, Hachioji, Japan 2 Tokyo Gakugei University, Koganei, Tokyo, Japan 2 Royal Institute of Technology, Stockholm, Sweden 2 Osaka Prefecture Univ., Sakai, Japan 2 Israel Inst. of Tech., Haifa, Israel 2 Institute of Ocean Sciences, Sidney, Canada 2 Institute for Astronomy, Honolulu, Hawaii 2 Federal Inst. of Technology, Zurich, Switzerland 2 Delft Univ. of Technology, Netherlands 2 Chalmers Univ. of Technology, Goteborg, Sweden 2 Arya Mehr University of Technology, Teheran, Iran 1 Yukawa Institute for Theoretical Physics 1 Tokyo Institute of Technology, Atsugi, Japan 1 Tokyo Institute of Polytechnics, Atsugi, Kanagawa, Japan 1 SUNY Institute of Technology, Utica, NY, US 1 Royal Inst. of Technology, Stockholm, Sweden 1 Rochester Institute of Technology, Rochester, NY 1 Racah Institute of Physics, Jerusalem, Israel 1 Pacific Enterprise, Ltd., Tokyo, Japan 1 New York Institute of Technology, Old Westbury, N.Y. 1 National Institute for Fusion Science, Nagoya, Japan 1 Lund Institute of Technology, Sweden 1 Lund Inst. of Technology, Sweden 1 Lund Inst. of Technology, Lund, Sweden 1 Korea Institute of Technology, Taejon, Republic of Korea 1 Kanazawa Institute of Technology, Kanazawa, Ishikawa, Japan 1 Institutet for Astronomi, Lund, Sweden 1 Institute of Nuclear Studies, Lodz, Poland 1 Institute of Molecular Science, Okazaki, Japan 1 Institute of Astronomy, Honolulu, HI, US 1 IPAC, California Institute of Techology, CA, US 1 Hyogo University of Teacher Education, Japan 1 Hydrographic Department, Tokyo, Japan 1 Hokkaido Information University, Ebetsu, Japan 1 Herzberg Institute of Astrophysics, Ottawa 1 Helsinki Univ. of Technology, Espoo 1 Hawaii Institute of Geophysics, Honolulu, Hawaii 1 Govt. Industrial Research Inst., Nagoya, Japan 1 Fukuoka Univ. of Education, Munakata, Japan 1 Fuji Research Institute Corp., Tokyo, Japan 1 Florida Inst. of Technology, Melbourne 1 Federal Institute of Technology, Zurich, Switzerland 1 Curtin Univ. of Technology, Perth, Australia 1 Chalmers Univ. of Technology, Onsala, Sweden 1 Califonia Inst. of Technology 1 Bandung Institute of Technology, Indonesia 1 Bandung Inst. of Technology, Indonesia 1 Aoyama-Gakuin University, Tokyo, Japan 1 American Institute of Physics, Woodbury, NY 39 20 Smithsonian Astrophysical Observatory, Cambridge, MA 58 Smithsonian Astrophysical Observatory, Cambridge, MA 17 Smithsonian Astrophysical Observatory, Cambridge, MA, US 9 Harvard College Observatory, Cambridge, MA 7 Special Astrophysical Observatory, Nizhni Arkhyz, Russia 6 South African Astronomical Observatory, Observatory 6 Arcetri Astrophysical Observatory, Florence, Italy 4 South African Astronomical Observatory, South Africa 2 Special Astrophysical Observatory, Russia 2 South African Astronomical Observatory Summer Student 2 Okayama Astrophysical Observatory, Japan 2 Nuclear and Astrophysics Laboratory, Oxford, UK 2 Abastumani Astrophysical Observatory, Tbilisi, Georgia 1 South African Astronomical Observatory, Cape Town 1 South African Astronomical Observatory 1 South Africa Astronomical Observatory, South Africa, 1 Smithsonian Astrophysical Observatory 1 Harvard-Smithsonian Astrophysical Observatory, Cambridge, MA 1 George R. Wallace, Jr. Astrophysical Observatory, Cambridge, Mass. 1 Astrophysical Observatory 1 Arcetri, Astrophysical Observatory, Florence, Italy 40 111 Istituto di Fisica Generale, Turin, Italy 11 Torino, Univ., Turin, Italy 11 CNR, Istituto di Fisica Cosmica e Informatica, Palermo, Italy 10 Pisa, Scuola Normale Superiore, Italy 10 Istituto Universitario Navale, Naples, Italy 9 Univ. di Firenze, Firenze, Italy 9 Istituto ed Osservatorio Astronomico, Palermo, Italy 9 Ist. Nazionale di Fisica Nucleare, Italy 6 Istituto Nazionale di Fisica Nucleare, Padua, Italy 6 Ist. Nazionale di Fisica Nucleare, Naples, Italy 6 Instituto di Fisica Cosmica del CNR, Milano, Italy 6 CNR, Istituto di Fisica Cosmica 5 Istituto TESRE/CNR, Bologna, Italy 5 Institut de Radioastronomie Millimetrique 5 Centro di Studi sui Sistemi, Turin, Italy 5 CNR, Istituto di Fisica Cosmica, Milan 5 CNR, Ist. di Fisica Cosmica, Milan 4 Torino Univ., Turin, Italy 4 Istituto Nazionale di Fisica Nucleare, Perugia, Italy 4 Istituto Nazionale di Fisica Nucleare 4 Ist. Nazionale di Fisica Nucleare, Turin, Italy 4 CNR, Istituto di Fisica dell'Atmosfera, Rome, Italy 3 Univ. of Rome 'La Sapienza', Rome, Italy 3 Istituto di Palermo, Palermo, Italy 3 Istituto di Fisica Cosmica del CNR, Milano, Italy 3 Istituto Nazionale di Fisica Nucleare, Padua 3 Istituto Nazionale di Fisica Nucleare, Frascati, Italy 3 Institut fuer Astronomie, Wien, Austria 3 CNR, Laboratorio di Cosmogeofisica, Turin, Italy 3 Astrofisico di Arcetri, Firenze, Italy 2 Vicolo dell'Osseratorio, Padova, Italy 2 Univ. 'La Sapienza', Roma, Italy 2 Torino, Politecnico, Turin, Italy 2 Istituto di Spettroscopia Molecolare, Bologna, Italy 2 Istituto di Fisica Generale dell'Universita, Torino, Italy 2 Istituto Nazionale di Fisica Nucleare, Rome, Italy 2 Istituto Nazionale di Fisica Nucleare, Italy 2 Istituto Nazionale di Fisica Nucleare, Bari, Italy 2 Ist. Nazionale di Fisica Nucleare, Rome 2 Ist. Nazionale di Fisica Nucleare, Perugia 2 Ist. Nazionale di Fisica Nucleare, Frascati, Italy 2 Instituto de Fisica-UFRGS, Porto Alegre, Brazil 2 Instituto de Astronomia, Mexico 2 Instituto de Astronomia, D.F., Mexico 2 Instituto de Astronomia y Geodesia, Madrid, Spain 2 Institute of Physics, Beograd, Yugoslavia 2 Insituto de Fisica, Porto Alegre, Brazil 2 Dipartimento di Fisica, Pisa, Italy 2 Dipartimento di Fisica dell'Univ., Milano, Italy 2 Citta Univ., Cantania, Italy 2 CNR, Laboratorio di Cosmo-geofisica, Turin, Italy 2 CNR, Ist. di Cosmogeofisica, Turin, Italy 2 CNR, Instituto di Fisica dell'Atmosfera, Rome, Italy 2 Asiago and Ekar Observatories, Italy 1 Univ. di Roma Tor Vergata, Roma, Italy 1 Univ. di Ferrara, Ferrara, Italy 1 Univ. di Catania, Catania, Italy 1 Univ. degli Studi di Trieste, Trieste, Italy 1 Unita di Ricerca di Catania, Catania, Italy 1 National Council of Research, Bologna, Italy 1 Messina Univ., Messina, Italy 1 Istituto di Fisica dell'Universita, Palermo, Italy 1 Istituto di Fisica dell'Universita, Bologna, Italy 1 Istituto di Fisica dell'Universita di Palermo, Bologna, Italy 1 Istituto di Fisica del'Univesita, Palermo, Italy 1 Istituto di Fisica del CNR, Milano, Italy 1 Istituto di Fisica Generale, Turin, Italy 1 Istituto di Fisica Generale, Torino, Italy 1 Istituto di Fisica Generale dell'Universita, Turin, Italy 1 Istituto di Fisica Generale dell'Univ., Torino, Italy 1 Istituto di Fisica Cosmica, CNR, Milano, Italy 1 Istituto di Fisica Cosmica del C.N.R., Milano, Italy 1 Istituto Universitario Navale, Napoli, Italy 1 Istituto Univ. Navale, Napoli, Italy 1 Istituto TESRE, CNR, Bologna, Italy 1 Istituto Nazionale di Fisica Nucleare, Rome 1 Istituto Nazionale di Fisica Nucleare, Perugia 1 Istituto Nazionale di Fisica Nucleare, Genoa, Italy 1 Istituto Nazionale di Fisica Nucleare, Ferrara, Italy 1 Istituto Nazionale di Fisica Nucleare, Cagliari, Italy 1 Ist. Nazionale di Fisica Nucleare, Perugia, Italy 1 Ist. Nazionale di Fisica Nucleare, Lecce, Italy 1 Instytut Fizyki Jadrowej, Krakow, Poland 1 Instituto di Fisica dell'Atmosfera del CNR, Rome, Italy 1 Instituto di Fisica del'Universita, Palermo, Bologna, Italy 1 Instituto di Fisica Cosmica, Milano, Italy 1 Instituto de Radioastronom 1 Instituto de Radioastromia 1 Instituto de Optica Daza de Valdes, Madrid, Spain 1 Instituto de Astrof&inodot& 1 Instituto Univ. Navale, Napoli, Italy 1 Instituto Superior Tecnico, Lisbon 1 Instituto Nacional de Tecnica Aeroespacial 1 Instituto Geografico Nacional, Guadalajara 1 Institut di Fisica Cosmica del CNR, Milano, Italy 1 Institut de Geofisica, Mexico 1 Inst. di Fisica dell'Atmosfera CNR, Rome, Italy 1 Inst. di Fisica Generale dell'Univ., Torino, Italy 1 Inst. de Physique du Globe, Paris, France 1 Inst. de FisicaCorpuscular, Burjasot, Spain 1 INFN-Sezione di Perugia, Perugia, Italy 1 Dp. di Fisica dell'Universita, Perugia, Italy 1 Dipartmento di Fisica, Genova, Italy 1 Dipartmento di Astronomia, Firenze, Italy 1 Dipartimento di Fisica, Genova, Italy 1 CNR, Unita di Ricerca di Asiago-Padova, Italy 1 CNR, Laboratoria di Cosmogeofisica, Turin, Italy 1 CNR, Istituto per la Fisica dell'Atmosfera, Rome, Italy 1 CNR, Istituto di Fisica della Atmosfera, Rome, Italy 1 CNR, Istituto di Fisica Spazio Interplanetario, Frascati 1 CNR, Istituto Nazionale di Fisica Nucleare, Pisa, Italy 1 CNR, Ist. di Fisica dell'Atmosfera, Rome, Italy 41 8 National Center for Atmospheric Research, Boulder, CO 28 National Center for Atmospheric Research, Boulder, CO, US 19 National Center for Atmospheric Research, Boulder, CO 10 National Center for Atmospheric Research, Boulder, Colo. 4 National Center for Atmospheric Research 2 National Center for Supercomputing Applications 2 National Center for Atmospheric, Boulder, CO, US 1 National Center for Atmospheric Research, Boulder, Colorado, US 1 Colorado, University, National Center for Atmospheric Research, Boulder, Colo. 42 156 Warner and Swasey Observatory, Cleveland, Ohio 136 Owens Valley Radio Observatory, Pasadena, CA 109 Owens Valley Radio Observatory, Pasadena, Calif. 82 U.S. Naval Observatory, Flagstaff, AZ 73 Van Vleck Observatory, Middletown, CT 65 Wyoming Infrared Observatory, Laramie 56 Royal University Observatory, Lund, Sweden 49 Warner and Swasey Observatory, Cleveland, OH 48 Onsala Space Observatory, Sweden 39 Perkins Observatory, Delaware, OH 24 Behlen Observatory, Lincoln, NE 23 Perkins Observatory, Delaware, Ohio 22 Helsinki Univ., Observatory, Finland 21 Wyoming Infrared Observatory, Laramie, WY 21 Las Campanas Observatory, La Serena, Chile 20 Case Western Reserve University, Cleveland, OH 20 C. E. Kenneth Mees Observatory, Rochester, NY 19 Cloudcroft Observatory, Cloudcroft, NM 17 Uttar Pradesh State Observatory, Nainital, India 17 Erwin W. Fick Observatory, Ames, IA 16 C. E. Kenneth Mees Observatory, Rochester, N.Y. 15 Owens Valley Radio Observatory, Big Pine, CA 14 U.S. Naval Observatory, Flagstaff, Ariz. 14 Erwin W. Fick Observatory, Ames, Iowa 13 Warner and Swasey Observatory, Cleveland, Ohio 13 Ege University Observatory, Izmir, Turkey 11 Yale University, Observatory, New Haven, Conn. 11 Behlen Observatory, Lincoln, Neb. 10 Vassar College Observatory, Poughkeepsie, NY 10 Flower and Cook Observatory, Philadelphia, Pa. 10 Braeside Observatory, Flagstaff, AZ 9 Perkins Observatory, Delaware 9 Clyde W. Tombaugh Observatory, Lawrence, KS 8 Yunnan Observatory, Yunnan, China 8 Rosemary Hill Observatory, Gainesville, FL 8 Harvard College Observatory, Cambridge, Mass. 7 Rosemary Hill Observatory, Gainesville, Fla. 7 Case Western Reserve Univ., Cleveland, OH, US 6 Warsaw Univ. Observatory, Poland 6 Warner and Swasey Observatory, East Cleveland, Ohio 6 Warner and Swasey Observatory, East Cleveland, OH 6 Purple Mountain Observatory, Nanjing, China 5 Yunnan Observatory, Kunming 5 Owens Valley Radio Observatory, Pasadena 5 Carnegie Observatories, La Serena, Chile 5 C.E. Kenneth Mees Observatory, Rochester, NY 4 Warsaw Univ. Observatory, Poland, UK 4 Vermilion River Observatory, Urbana, Ill. 4 Uttar Pradesh State Observatory, Naini Tal, India 4 Radio Observatory, Columbus, Ohio 4 Millimeter Wave Observatory, Fort Davis, Tex. 4 Millimeter Wave Observatory, Fort Davis 4 Dudley Observatory, Schenectady, NY 4 Battelle Observatory, Richland, Wash. 4 Aarne Karjalainen Observatory, Oulu, Finland 3 Yerkes Observatory, Chicago, Ill. 3 Yerkes Observatory, Chicago, IL 3 Yale University, Observatory, New Haven, CT 3 Owens Valley Radio Observatory, Big Pine, Calif. 3 Las Campanas Observatory, Las Campanas, Chile 3 Flower and Cook Observatory, Philadelphia, PA 3 C.E.K. Mees Observatory, Rochester, N.Y. 3 Barksdale Observatory, Winter Park, FL 2 Yonsei Univ. Observatory, Seoul, Korea 2 Yale Univ. Observatory, New Haven, CT 2 Wyoming Infrared Observatory, Laramie, Wyo. 2 Wroclaw University Observatory, Wroclaw, Poland 2 Vatican Observatory, Vatican City 2 Uppsala Observatory, Sweden 2 Turku Univ. Observatory, Finland 2 San Fernando Observatory, Northridge 2 San Fernando Observatory, El Segundo, Calif. 2 San Fernando Observatory, El Segundo, CA 2 San Fernando Observatory, El Segundo 2 Royal Observatory, Scotland, UK 2 Pinecrest Observatory, Honolulu, HI 2 Pinecrest Observatory, Flagstaff, AZ 2 Owens Valley Observatory, Pasadena, CA 2 Onsala Space Observatory, Onsala 2 Nizamiah Observatory, Hyderabad, India 2 Harvard College Observatory, Fort Davis, Tex. 2 Edinburgh, Royal Observatory, Scotland 2 Dudley Observatory, Albany, N.Y. 2 Clark Lake Radio Observatory, College Park, Md. 2 Clark Lake Radio Observatory, College Park, MD 2 Carter National Observatory of New Zealand, Wellington 2 C. E. K. Mees Observatory, Rochester, N.Y. 2 Aegean University Observatory, Bornova, Turkey 1 van Vleck Observatory, Middletown, CT 1 Yale University Observatory, New Haven, CT, US 1 Yale University Observatory, New Haven Conn. 1 Yale University Observatory, Bethany, Conn. 1 Wesleyan Observatory, Middletown, CT 1 Warner and Swasey Observatory, East Cleveland 1 Warner and Swasey Observatory, Cleveland OH 1 Warner & Swasey Observatory, Cleveland, OH 1 Vermilion River Observatory, Danville, Ill. 1 Vassar College, Observatory, Poughkeepsie, NY 1 Vainu Bappu Observatory, Tami Nadu, India 1 Utter Pradesh State Observatory, Nainital, India 1 Uttar Pradesh State Observatory, Naintal, India 1 U.S Naval Observatory, Flagstaff, AZ 1 Turku University Observatory, Pikkio, Finland 1 Turku University Observatory, Piikio, Finland 1 Torun Radio Observatory, Poland 1 Table Mountain Observatory, Wrightwood, CA 1 Scuppernong Observatory, Dousman, WI 1 San Fernando, Observatorio, Cadiz, Spain 1 San Fernando Oservatory, El Segundo, Calif. 1 Rosemary Hill Observatory, Gainesville, Fla 1 Renner Observatory, Dousman, Wis. 1 Prospect Hill Observatory, Harvard, MA 1 Perkins Observatory, Columbus, Ohio 1 Perkins Observatory, Columbus, OH 1 Parkes Observatory, Australia 1 Owens Valley Radio Observatory, Pasadena, Calif, 1 Owens Valley Radio Observatory, Pasadena, Calif 1 Owens Valley Radio Observatory, Padadena, Calif. 1 Owens Valley Radio Observatory, Padadena, CA 1 Owens Valley Radio Observatorry, Pasadena, CA 1 Ondrejov Observatory, Czechoslovakia 1 Nightwatch Observatory, Fair Oaks, CA 1 Nielsen Observatory, Wilmington, DE 1 Mount Hopkins Observatory, Phoenix, AZ 1 Morehead Observatory, Chapel Hill, NC 1 Millimeter Wave Observatory, Fort Davis, TX 1 Lines Observatory, Phoenix, AZ 1 Las Campanas Observatory, Pasadena, Calif. 1 Las Campanas Observatory, La Serena 1 Joseph R. Grundy Observatory, Lancaster, PA 1 Helsinki, Univ., Observatory, Finland 1 Greentree Observatory, Tempe, AZ 1 Fred L. Whipple Observatory, Amado 1 Flower and Cook Observatory, Philadelphia, Pa 1 Flower and Cook Observatory, Philadelphia 1 Flower and Cook Observatory, Malvern, PA 1 Fernbank Science Center Observatory, Atlanta, Ga. 1 Faun Lane Observatory, Garden Grove, CA 1 Erwin Fick Observatory, Ames, IA 1 Dudley Observatory, Schenectady, N.Y. 1 Dudley Observatory, Latham 1 Dudley Observatory, Albany 1 Crescent Moon Observatory, Columbus, IN, US 1 Cloudcraft Observatory, Cloudcroft, NM 1 Cleveland State University, Cleveland, Ohio, US 1 Clark Lake Radio Observatory, College Park 1 Cincinnati Observatory, Cincinnati, Ohio 1 Casey Observatory, Eau Claire, WI 1 Case Western Reserve University, Cleveland, Ohio 1 Case Western Reserve Univ., Cleveland, OH 1 Carnegie Southern Observatory, Las Campanas, Chile 1 Capilla Peak Observatory, Albuquerque, NM 1 C. W. Tombaugh Observatory, Lawrence, KS 1 Burke-Gaffney Observatory, Halifax, Canada 1 Battelle Observatory, Richland, WA 1 Arthur J. Dyer Observatory, Nashville, TN 1 Armagh Observatory, Ireland 43 16 NASA/Fermilab Astrophysics Center, Batavia 30 NASA/Fermilab Astrophysics Center, Batavia, IL 13 NASA, Astrophysics Div., Washington, DC 12 NASA/Fermilab Astrophysics Center, Batavia 5 NASA. Fermilab Astrophysics Center, Batavia, IL, US 3 Zielona Gora Astronomical Center, Poland 2 Stichting Astronomisch Onderz 2 Center for Plasma-Astrophysics, Heverlee, Belgium 1 NASA/Fermilab. Astrophysics Center, Batavia, IL 1 NASA/Fermilab Astrophysics Group, Batavia, IL 1 NASA, Fermilab Astrophysics Center, Batavia, IL 1 Laboratory for Astrophysics, Torun, Poland 1 IBM Venezuela, Scientific Centre, Caracas 1 IBM Venezuela, Scientific Center, Caracas 1 Columbia Astrophysics Lab., NY, NY, US 1 Center for Plasma Astrophysics, Heverlee, Belgium 1 Center for Astrophysics, CCAST, Beijing, China 44 4 International Ultraviolet Explorer Observatory, Madrid, Spain 55 International Ultraviolet Explorer Observatory, Madrid, Spain 3 International Latitude Observatory, Mizusawa, Japan 1 International Ultraviolet Observatory, Madrid, Spain 1 International Ultraviolet Explorer Observatory 45 12 Instituto de Astronomia y Fisica del Espacio, Buenos Aires, Argentina 48 CONICET, Instituto de Astronomia y Fisica del Espacio, Buenos Aires, Argentina 33 Instituto de Astronomia y Fisica del Espacio, Buenos Aires, Argentina 5 Instituto de Astronomia y Fisica del Espacio, Buenos Aires 5 CONICET, Instituto de Astronomia y Fisica del Espacio, Buenos Aires 5 CONICET, Inst. de Astronomia y Fisica del Espacio, Buenos Aires, Argentina 4 Inst. de Astronomia y Fisica del Espacio, Buenos Aires, Argentina 2 Instituto de Astronomia, Buenos Aires, Argentina 1 Instituto de Astronomia y Fisica del Espacio, C.C.67, Suc. 28, 1428 Buenos Aires, Argentina. 1 Instituto de Astronomia y Fisica de Espacio, Buenos Aires, Argentina 1 Inst. de Astronomia y Fisica del Espacio, Buenos Aires 1 Inst. de Astron. y Fisica del Esp., Buenos Aires, Argentina 1 CONICET, Instituto de Astronomia y Fisica del Espacio, Buenoe Aires, Argentina 46 20 Osservatorio Astronomico, via Zamboni 33, I-40126 Bologna, Italy 12 Osservatorio Astronomico di Bologna, via Zamboni 33, I-40126 Bologna, Italy 6 Osservatorio Astronomico, Via Zamboni 33, I-40126 Bologna, Italy 5 Osservatorio Astronomico, via Zamboni 33, I-40126 Bologna, Italy 5 Osservatorio Astronomico di Brera, via Brera 28, 20121 Milano, Italy 5 Osservatorio Astronomico di Brera, Via Brera 28, I-20121 Milano, Italy 4 Osservatorio Astronomico di Brera, Via Brera 28, 20121 Milano, Italy 4 Osservatorio Astronomico di Bologna, via Zamboni 33, Bologna 40126, Italy 4 Osservatorio Astronomico di Bologna, Via Zamboni 33, I-40126 Bologna, Italy 3 Osservatorio Astronomico di Collurania, I-64100, Teramo, Italy 2 Osservatorio Astronomico, Via dell'Osservatorio 5, I-35122 Padova, Italy 2 Osservatorio Astronomico, Via Zamboni 33, I-40126, Bologna, Italy 2 Osservatorio Astronomico, Via Zamboni 33, I-40125 Bologna, Italy 1 Osservatorio Astronomico, via GB Tiepolo 11, I-34131 Trieste, Italy 1 Osservatorio Astronomico, Via GB Tiepolo, 11, I-34131 Trieste, Italy 1 Osservatorio Astronomico, Via G.B. Tiepolo, 11, I-34131 Trieste, Italy 1 Osservatorio Astronomico di Roma, I-00040 Monte Porzio, Italy 1 Osservatorio Astronomico di Bologna, via Zamboni 33, Bologna, Italy 1 Osservatorio Astronomico di Bologna, via Zamboni 33, 40126 Bologna, Italy 1 Osservatorio Astronomico Bologna, via Zamboni 33, I-40126 Bologna, Italy 1 Dipartimento di Astronomia, via Zamboni 33, I-40126 Bologna, Italy 47 20 Kiepenheuer-Institut fuer Sonnenphysik, Freiburg im Breisgau, West Germany 48 Kiepenheuer-Institut fuer Sonnenphysik, Freiburg im Breisgau, West Germany 41 Kiepenheuer-Institut fuer Sonnenphysik, Freiburg im Breisgau, Federal Republic of Germany 15 Fraunhofer Institut, Freiburg im Breisgau, West Germany 14 Kiepenheuer-Inst. fuer Sonnenphysik, Freiburg im Breisgau, Germany 5 Kiepenheuer Institut fuer Sonnenphysik, Freiburg im Breisgau, West Germany 3 Kiepenheuer-Institut fuer Sonnenphysik, Freiburg-im-Breisgau, West Germany 2 Kiepenheuer Institut fuer Sonnenphysik, Freiburg im Breisgau, Federal Republic of Germany 1 Kipenheuer-Institut fuer Sonnenphysik, Freiburg im Breisgau, Federal Republic of Germany 1 Kiepenheur-Institut fuer Sonnenphysik, Freiburo im Breisqau, West Germany 1 Kiepenheur-Institut fuer Sonnenphysik, Freiburg im Breisgau, West Germany 1 Kiepenheuerinstitut fuer Sonnenphysik, Freiburg im Breisgau, West Germany 1 Kiepenheuer-Institut, fuer Sonnenphysik, Freiburg im Breisgau, West Germany 1 Kiepenheuer-Institut fur Sonnenphysik, Freiburg im Breisgau, West Germany 1 Kiepenheuer-Institut fuer Sonnephysik, Freiburg im Breisgau, West Germany 1 Kiepenheuer-Institut fuer Sonnenphysik, Frieburg im Breisgau, Federal Republic of Germany 1 Kiepenheuer-Institut fuer Sonnenphysik, Freiburg, Federal Republic of Germany 1 Kiepenheuer-Institut fuer Sonnenphysik, Freiburg im Briesgau, Federal Republic of Germany 1 Kiepenheuer-Institut fuer Sonnenphysik, Freiburg im Breisgall, West Germany 1 Kiepenheuer - Institut fuer Sonnenphysik, Freiburg im Breisgau, West Germany 1 Fraunhofer Institut, Freiburgh im Breisgau, West Germany 48 10 Haute-Provence, Observatoire, Saint-Michel l'Observatoire, France 57 Haute-Provence, Observatoire, Saint-Michel-l'Observatoire, France 9 Haute Provence, Observatoire, Saint-Michel-l'Observatoire, France 6 Haute-Provence, Observatoire, St.-Michel-l'Observatoire, France 6 Haute-Provence, Observatoire, Saint-Michel l'Observatoire, France 3 Haute Provence, Observatoire, St.-Michel-l'Observatoire, France 2 Haute-Provence Observatoire, Saint-Michel-l'Observatoire, France 1 Haute-Provence, Observatoire, Saint-Michel-l'Observatoire, Basses-Alpes, France 1 Haute-Provence Observatoire, Saint-Michel l'Observatoire, France 1 Haute-Provence Observatoire, Saint-Michel de l'Observatoire, France 1 Haute-Provence Observatoire, Saint-Michel L'Observatoire, France 49 13 Pic-du-Midi, Observatoire, Bagneres-de-Bigorre, Hautes-Pyrenees, France 16 Pic-du-Midi et Toulouse, Observatoires, Bagneres-de-Bigorre, Hautes-Pyrenees, France 13 Pic-du-Midi, Observatoire, Bagneres-de-Bigorre, Hautes-Pyrenees, France 6 Pic-du-Midi, Observatoire, Bagneres-de-Bigorre, Hautes-Pyrenees 5 Pic-du-Midi, Observatoire, Bagneres-de-Bigorre, France 2 Pic du Midi et Toulouse, Observatoires, Bagneres-de-Bigorre, Hautes-Pyrenees, France 1 Pic-duc-Midi et Toulouse, Observatoires, Bagneres-de-Bigorre, Hautes- Pyrenees, France 1 Pic-du-Midi, Observatoire, Bagneres de Bigorre, Hautes-Pyrenees, France 1 Pic-du-Midi et de Toulouse, Observatoires, Bagneres-de-Bigorre, Hautes-Pyrenees, France 1 Pic-du-Midi et Toulouse, Observatoires, Bagneres-de-Bigorre, Hauts-Pyrenees, France 1 Pic-du-Midi et Toulouse, Observatoires, Bagneres-de-Bigorre, Hautes-Pyrenees 1 Pic-du-Midi et Toulouse, Observatoires, Bagneres-de Bigorre, Hautes-Pyrenees, France 1 Pic-du-Midi et Toulouse, Observatoire, Bagneres-de-Bigorre, Hautes-Pyrenees, France 1 Pic du Midi, Observatoire, Bagneres-de-Bigorre, Hautes-Pyrenees, France 50 23 Max-Planck-Institut fur Astrophysik, Postfach 1523, 85740 Garching, Germany 16 Max-Planck-Institut fur Astrophysik, Karl-Schwarzschild-Strasse 1, 85748 Garching, Germany 6 Max-Planck-Institut fur Astrophysik, Postfach 1523, D-85740 Garching, Germany 5 Max-Planck-Institut fur Astrophysik, Karl-Schwarzschild-Strasse 1, D-85740 Garching, Germany 4 Max-Planck-Institut fur Astrophysik, Karl-Schwarzschild-Strasse 1, D-85748 Garching, Germany 3 Max-Planck-Institut fur Astrophysik, Karl-Schwarzschild-Strasse 1, 85740 Garching, Germany 3 Max-Planck-Institut fur Astrophysik, Karl-Schwarzschild- Strasse 1, 85748 Garching, Germany 3 Max Planck Institute for Astrophysics, Box 1523, D-85740 Garching, Germany 2 Max-Planck-Institut fur Radioastronomie, Postfach 2024, 53010, Bonn, Germany 2 Max-Planck-Institut fur Astrophysik, Postfach 1523,D-85740 Garching, Germany 2 Max-Planck-Institut fur Astrophysik, Postfach 1523, 85740 Garching, Germany 1 Max-Plank-Institut fur Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching, Germany 1 Max-Planck-Institut fur extraterrestrische Physik, Postfach 1603, D-85740, Garching, Germany 1 Max-Planck-Institut fur extraterrestrische Physik, Postfach 1063, D85740 Garching, Germany 1 Max-Planck-Institut fur Radioastronomie, Postfach 2024, D-53010, Bonn, Germany 1 Max-Planck-Institut fur Kernphysik, Postfach 103980, D-69029 Heidelberg, Germany 1 Max-Planck-Institut fur Extraterrestrische Physik, Postfach 1603, D85740 Garching, Germany 1 Max-Planck-Institut fur Astrophysik, Postfach 1523, D-85740 Garching bei Munchen, Germany 1 Max-Planck-Institut fur Astrophysik, Postfach 1523, D-85740 Garching b. Munchen, Germany 1 Max-Planck-Institut fur Astrophysik, Postfach 1523, 85740 Garching bei Munchen, Germany 1 Max-Planck-Institut fur Astrophysik, Karl-Schwarzschild-Str. 1, D-85748 Garching, Germany 1 Max-Planck-Institut fur Astrophysik, Karl-Schwarzschild- Strasse 1, 85740 Garching, Germany 1 Max-Planck-Institut fur Astrophysik, Karl-Schwarzschild Strasse 1, D-85740 Garching, Germany 1 Max-Planck-Institut fur Astrophysik, D-85740 Garching bei Munchen, Germany 51 5 Kiel, Neue Universitaet, Institut fuer theoretische Physik und Sternwarte, Kiel, West Germany 29 Kiel, Neue Universitaet, Institut fuer theoretische Physik und Sternwarte, Kiel, West Germany 15 Kiel, Neue Universitaet, Institut fuer Theoretische Physik und Sternwarte, Kiel, West Germany 1 Kiel, Neue Universitat, Institut fur theoretische Physik und Sternwarte, Kiel, West Germany 1 Kiel, Neue Universitaet, Institut fuer theoretische physik und Sternwarte, Kiel, West Germany 1 Kiel, Neue Universit t, Institut f r theoretische Physik und Sternwarte, Kiel, West Germany 52 7 Kiel, Univ., Inst. fuer Theoretische Physik und Sternwarte, Germany 19 Kiel, Univ., Inst. fuer Theoretische Physik und Sternwarte, Germany 4 Inst. fuer Theoretische Physik und Sternwarte der Univ, Kiel, Germany 2 Institut fuer Theoretische Physik und Sternwarte, Kiel, Germany 2 Inst. fuer Theoretische Physik und Sternwarte und Univ, Kiel, Germany 1 Kiel, Universitaet, Institut fuer Theoretische Physik und Sternwarte 1 Kiel, Univ., Inst. fuer Theoretische Physik und Sternwarte 1 Inst. fuer Theoretische Physik und Sternwarte, Kiel, Germany 53 13 CNR, Laboratorio di Fisica Cosmica e Tecnologie Relative, Milan, Italy 45 CNR, Laboratorio di Fisica Cosmica e Tecnologie Relative, Milan, Italy 7 CNR, Laboratorio di Fisica Cosmica e Tecnologie Relative 5 CNR, Laboratorio di Fisica Cosmica e Tecnologie Relative, Palermo, Italy 5 CNR, Laboratorio di Fisica Cosmica e Technologie Relative, Milan, Italy 4 CNR, Laboratorio di Fisica Cosmica, Milan, Italy 4 CNR, Istituto per Ricerche in Fisica Cosmica e Tecnologie Relative, Milan, Italy 4 CNR, Istituto di Fisica Cosmica e Tecnologie Relative, Milan, Italy 1 CNR, Laboratorio di Fisica Cosmica e Technologie Relative, Palermo, Italy 1 CNR, Laboratorio di Fisica Cosmica e Technologia Relativa, Milan, Italy 1 CNR, Laboratorio de Fisica Cosmica e Tecnologie Relative, Milan, Italy 1 CNR, Laboratorio de Fisica Cosmica e Tecnologie Relative 1 CNR, Laboratorio Fisica Cosmica, Milan, Italy 1 CNR, Laboratorio Fisica Cosmica e Tecnologie Relative, Milan, Italy 54 8 International Centre for Relativistic Astrophysics, Rome, Italy 10 International Centre for Relativistic Astrophysics, Rome, Italy 10 International Centre for Relativistic Astrophysics 10 International Center for Relativistic Astrophysics, Rome, Italy 9 Inter-Univ. Centre for Astronomy and Astrophysics, Poona, India 4 National Centre for Radio Astrophysics, Poona, India 4 Inter-Univ. Centre for Astronomy and Astrophysics, Pune, India 3 International Center for Relativistic Astrophysics 1 International Center for Relativistic Astrophysics, Rome 55 19 CONICET, Instituto Argentino de Radioastronomia, Villa Elisa, Argentina 25 Instituto Argentino de Radioastronomia, Villa Elisa, Argentina 18 CONICET, Instituto Argentino de Radioastronomia, Villa Elisa, Argentina 15 Instituto Argentino de Radioastronomia, Villa Elisa 8 Instituto Argentino de Radioastronomia, Villa Elisa, Buenos Aires, Argentina 5 Instituto Argentino de Radioastronomia, Buenos Aires, Argentina 4 CONICET, Instituto Argentino de Radioastronomia, Villa Elisa 3 Instituto Argentino de Radioastronomia, Argentina 3 Inst. Argentino de Radioastronomia, Villa Elisa, Argentina 2 Instituto Argentino de Radioastronomia, C.C. 5, 1894 Villa Elisa, Argentina 1 Instituto Argentino di Radioastronomia, Villa Elisa, Argentina 1 Instituto Argentino de Radiodastronomia Villa Elisa 1 Instituto Argentino de Radioastronomia, Villa Elisa, Buenos Aires 1 Instituto Argentino de Radioastronomia, Buenos Aires 1 Inst. Argentino de Radioastronomia, Villa Elisa 1 CONYCET, Instituto Argentino de Radioastronomia, Villa Elisa, Argentina 1 CONICET, Instituto Argentino de Radioastronomia, Villa Elisa, Angentina 1 CONICET, Instituto Argentino de Radioastronomia, Vila Elisa, Argentina 1 CONICET, Instituto Argentino de Radioastromia, Villa Elisa, Argentina 1 CONICET, Instituto Argentina de Radioastronomia, Villa Elisa, Argentina 56 26 Universitaets-Sternwarte, Bonn, Federal Republic of Germany 20 Observatorium Hoher List, Daun, Federal Republic of Germany 13 Universitaets-Sternwarte, Bonn, Federal Republic of Germany 7 Universitaets-Sternwarte, Jena, Federal Republic of Germany 7 Remeis-Sternwarte, Bamberg, Federal Republic of Germany 5 Bochum, Sternwarte, Federal Republic of Germany 3 Darmstadt, Technische Hochschule, Federal Republic of Germany 3 DLR, Oberpfaffenhofen, Federal Republic of Germany 2 Wilhelmshaven, Fachhochschule, Federal Republic of Germany 2 Universitaets-Sternwarte, Jena, German Democratic Republic 2 Sternwarte Babelsberg, Potsdam, Federal Republic of Germany 2 Sonneberg, Sternwarte, Federal Republic of Germany 2 Remeis Sternwarte, Bamberg, Federal Republic of Germany 2 DLR, Cologne, Federal Republic of Germany 1 Wilhelm-Foerster-Sternwarte, Berlin, Federal Republic of Germany 1 Universitaets Sternwarte, Bonn, Federal Republic of Germany 1 Robert Bosch GmbH, Reutlingen, Federal Republic of Germany 1 Rittal-Werk, Herborn, Federal Republic of Germany 1 Jenoptic Jena GmbH, Federal Republic of Germany 1 Institut fuer Astrophysik, Potsdam, Federal Republic of Germany 1 EXOSAT Observatory, Darmstadt, Federal Republic of Germany 1 DLR, Wessling, Federal Republic of Germany 1 DFVLR, Wessling, Federal Republic of Germany 1 DFVLR, Wesseling, Federal Republic of Germany 1 DFVLR, Oberpfaffenhofen, Federal Republic of Germany 1 Biochemical Institute, Ahrensburg, Federal Republic of Germany 1 Babalsberg, Sternwarte, Federal Republic of Germany 57 10 Kernforschungszentrum Karlsruhe GmbH, Federal Republic of Germany 23 Berlin, Technische Universitaet, Federal Republic of Germany 14 Kernforschungszentrum Karlsruhe GmbH, Federal Republic of Germany 10 Kernforschungszentrum Karlsruhe GmbH, Karlsruhe, West Germany 3 Kernforschungszentrum Karlsruhe GmbH, West Germany 2 Kernforschungszentrum Karlsruhe GmbH, Karlsruhe, Federal Republic of Germany 2 Kernforschungszentrum Karlsruhe GmbH, Institut fuer Kernphysik, West Germany 2 Kernforschungszentrum Karlsruhe GmbH, Germany 1 Kernfoschungszentrum Karlsruhe GmbH, Karlsruhe, West Germany 1 Kernforschungszentrum Karlsruhe, GmbH, Karlsruhe, West Germany 1 Kernforschungszantrum Karlsruhe GmbH, West Germany 58 10 International Centre for Theoretical Physics, Trieste, Italy 23 International Centre for Theoretical Physics, Trieste, Italy 16 International School for Advanced Studies, Trieste, Italy 10 International Center for Theoretical Physics, Trieste, Italy 5 International Centre for Theoretical Physics 1 SISSA-International School for Advanced Studies, Trieste, Italy 1 International School for Advanced Study, Trieste, Italy 1 International School for Advanced Studies (SISSA), Trieste, Italy 1 International Centre for Theoretical Astrophysics, Italy 1 International Centre for Cosmology, Toravere, Estonia 1 International Center for Theoretical Physics 59 24 Universities Space Research Association, Greenbelt, MD 23 Universities Space Research Association, Greenbelt, MD 21 Universities Space Research Association 12 Universities Space Research Association, Washington 9 Universities Space Research Association, Washington, DC, US 8 Universities Space Research Association, Columbia, MD 7 Universities Space Research Association, Washington, DC 3 Berkeley Research Associates, Berkeley, CA 2 Universities Space Research Association, Huntsville, AL, US 2 Universities Space Research Association, Huntsville, AL 2 Universities Space Research Association, Greenbelt, MD, US 2 Universities Space Research Association, Columbia, MD, US 2 Universities Space Research Association NASA/GSFC, Greenbelt, MD 20711, USA 2 Univ. Space Research Association, Washington 2 Berkeley Research Associates, Boulder, CO 1 University Space Research Association, Greenbelt, MD 1 University Research Foundation, Greenbelt, MD 1 Universities Space Research Association, Seabrook, MD, US 1 Universities Space Research Association, Flagstaff, AZ 1 Universities Space Research Association, Chicago, IL, US 1 Universities Space Research Associates, Washington, DC, US 1 Univ. Space Research Association, Huntsville, AL 1 Univ. Space Research Association 1 International Occultation Timing Association, Greenbelt, MD 1 Berkeley Research Associates, Inc., CA 60 7 ESA, Villafranca Satellite Tracking Station, Madrid, Spain 51 ESA, Villafranca Satellite Tracking Station, Madrid, Spain 5 ESA, Satellite Tracking Station, Madrid, Spain 2 ESA, Villafranca del Castillo Satellite Tracking Station, Madrid, Spain 1 Villafranca Satellite Tracking Station, Madrid, Spain 1 ESA, Villafranco Satellite Tracking Station, Madrid, Spain 1 ESA, Villafranca, Satellite Tracking Station, Madrid, Spain 1 ESA Villafranca Satellite Tracking Station, Madrid, Spain 61 6 Franklin Institute, Bartol Research Foundation, Newark, Del. 22 Franklin Institute, Bartol Research Foundation, Newark, DE 11 Franklin Institute, Bartol Research Foundation, Newark, Del. 10 Franklin Institute, Bartol Research Foundation, Swarthmore, Pa. 8 Bartol Research Foundation, Newark, DE 1 Franklin Institute, Bartol Research Foundation, Wilmington, Del. 1 Franklin Institute Bartol Research Foundation, Swarthmore, Pa. 62 9 Centro de Investigaciones de Astronomia, Merida, Venezuela 32 Centro de Investigaciones de Astronomia, Merida, Venezuela 4 Centro de Investigacion de Astronomia, Merida, Venezuela 1 Instituto Venezolano de Astronomia, Merida, Venezuela 1 Centro de Investigaciones de Astronomia, Merida 1 Centro de Investigaciones de Astronomia, Apdo, Merida, Venezuela 1 Centro de Investigaciones de Astronomia, AP 264, Merida 5101-A, Venezuela 1 Centro de Investigaciones de Astronomia 1 Centro de Investigacion de Astronomia Merida, Venezuela 1 Asociacion Carabobena de Astronomia, Valencia, Venezuela 63 24 Jet Propulsion Lab., Cal. 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Oxon, England 2 Science Research Council, Appleton Laboratory, Abingdon, Oxon., England 1 Science Research Council, Daresbury Laboratory, Warrington, Lancs., England 1 Science Research Council, Appleton Laboratory, Slough, Berks. 67 20 National Bureau of Standards, Quantum Physics Div., Boulder, CO 17 National Bureau of Standards, Washington, D.C. 17 National Bureau of Standards, Quantum Physics Div., Boulder, CO 8 National Bureau of Standards, Quantum Physics Div., Boulder, Colo. 6 National Bureau of Standards, Laboratory Astrophysics Div., Boulder, Colo. 5 National Bureau of Standards, Boulder, Colo. 4 National Bureau of Standards, Washington, DC 4 National Bureau of Standards, Time and Frequency Div., Boulder, CO 4 National Bureau of Standards, Boulder, CO 4 NIST, Quantum Physics Div., Boulder, CO 4 NBS, Quantum Physics Div., Boulder, CO 3 National Bureau of Standards, Optical Physics Div., Washington, D.C. 2 National Bureau of Standards, Gaithersburg, Md. 1 National Bureau of 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Pic-du-Midi et Toulouse, Observatoires, Tolouse, France 1 Pic-du-Midi et Toulouse, Observatoires, Bagn 1 Pic du Midi et Toulouse, Observatories, Toulouse, France 1 Pic du Midi et Toulouse, Observatoires, Toulouse 1 Pic du Midi et Toulouse, Observatoires, Bagneres-de-Bigorre, France 1 Pic du Midi et Toulouse Observatoires, Toulouse, France 69 39 Glavnaia Astronomicheskaia Observatoriia, Kiev, Ukrainian SSR 32 Krymskaia Astrofizicheskaia Observatoriia, Nauchny, Ukrainian SSR 16 Spetsial'naia Astrofizicheskaia Observatoriia, Nizhni Arkhyz, USSR 13 Spetsial'naia Astrofizicheskaia Observatoriia, Zelenchukskaya, USSR 13 Biurakanskaia Astrofizicheskaia Observatoriia, Yerevan, Armenian SSR 11 Natsionalna Astronomicheska Observatoriia, Sofia, Bulgaria 9 Astrofizicheskaia Observatoriia, Tartu, Estonian SSR 8 Tartuskaia Astrofizicheskaia Observatoriia, Toravere, Estonian SSR 7 Glavnaia Astronomicheskaia Observatoriia, Pulkovo, USSR 6 Radioastrofizicheskaia Observatoriia, Riga, Latvian SSR 6 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Astrofizicheskaia Observatoriia, Nizhnii Arkhyz, USSR 1 Spetsial'naia Astrofizicheskaia Observatoriia, Nizhni Arkhyz 1 Spetsial'naia Astrofizicheskaia Observatoriia, Nizhni Arkhys, USSR 1 Shemakhinskaia Astrofizicheskaia Observatoriia, Shemakha 1 Natsionalna Astronomicheska Observatoriia, Smoljan, Bulgaria 1 Natsionalna Astronomicheska Observatoriia, Rozhen, Bulgaria 1 Krymskaia Astrofizicheskaia Observatoriia, Simeiz, USSR 1 Krymskaia Astrofizicheskaia Observatoriia, Nauchny, Ukrainian, SSR 1 Krymskaia Astrofizicheskaia Observatoriia, Nauchny, Ukraine 1 Krymskaia Astrofizicheskai Observatoriia, Nauchny, Ukrainian SSR 1 Glavnaya Astronomicheskaya Observatoriya, Pulkovo, Russia 1 Glavnaia Astronomicheskaia Observatoriia, Goloseevo, Ukraine 1 Astronomicheskaia Observatoriia, Odessa, Ukrainian, SSR 1 Astrofizicheskaia Observatoriia, Tortu, Estonian SSR 1 Astrofizicheskaia Observatoriia Nizhni Arkhyz, USSR 70 12 NASA, Ames Research Center, Space Sciences Div., Moffett Field, CA 22 NASA, Ames Research Center, Space Sciences Div., Moffett Field, Calif. 13 NASA, Ames Research Center, Space Sciences Div., Moffett Field, CA 7 NASA, Ames Research Center, Space Science Div., Moffett Field 5 NASA, Ames Research Center, Space Sciences Div., Moffett Field 5 NASA, Ames Research Center, Space Science Div., Moffett Field, Calif. 3 NASA, Ames Research Center, Theoretical Studies Branch, Moffett Field, Calif. 2 NASA, Ames Research Center, Theoretical Studies Branch, Moffett Field, CA 2 NASA, Ames Research Center, Astrophysics Branch, Moffett Field, Calif. 1 NASA, Ames Research Center, Space Projects Div., Moffett Field, CA 1 NASA, Ames Research Center, Extraterrestrial Research Div., Moffett Field, Calif. 1 NASA, Ames Research Center, Extraterrestrial Research Div., Moffett Field, CA 1 NASA, Ames Research Center, Astrophysical Experiments Branch, Moffett Field, CA 71 16 Aerospace Corp., Space Sciences Laboratory, Los Angeles, CA 54 Aerospace Corp., Space Sciences Laboratory, Los Angeles, CA 14 Aerospace Corp., Space Sciences Laboratory, Los Angeles, Calif. 7 Aerospace Corp., Space and Environment Technology Center, Los Angeles, CA 6 Aerospace Corp., Space Sciences Laboratory, Los Angeles 5 Aerospace Corp., Electronics Research Laboratory, Los Angeles, Calif. 4 Aerospace Corporation, Los Angeles, CA, US 3 Aerospace Corp., Space Sciences Laboratory, El Segundo, Calif. 3 Aerospace Corp., Ivan A. Getting Laboratories, Los Angeles, Calif. 3 Aerospace Corp., Electronics Research Laboratory, Los Angeles, CA 2 Aerospace Corp., Space Science Laboratory, Los Angeles, CA 1 The Aerospace Corp., Space Sciences Laboratory, Los Angeles, CA 1 Aerospace Corp., Space Sciences, Laboratory, Los Angeles, CA 1 Aerospace Corp., Space Sciences Laboratory, Los Angeles Calif. 1 Aerospace Corp., Space Sciences Laboratory, El Segundo, CA 1 Aerospace Corp., Space Science Laboratory, Los Angeles, Calif. 1 Aerospace Corp., Space Physics Laboratory, Los Angeles, Calif. 72 30 Observatorio Astronomico, Santiago de Compostela, Spain 32 Observatorio Astronomico Nacional, Madrid, Spain 18 Observatorio Astronomico Nacional, Ensenada, Mexico 9 Observatorio Astronomico, Santiago de Compostela, Spain 9 Observatorio Astronomico Nacional, Santiago, Chile 9 Observatorio Astronomico Nacional, Guadalajara 5 Observatorio Astronomico de Cerro Calan, Santiago, Chile 5 Observatorio Astronomico Nacional, Granada, Spain 5 Observatoire Astronomique du Mont Megantic 4 Observatorio Astronomico Nacional, Bogota, Colombia 3 Universidad de Santiago, Santiago de Compostela, Spain 3 Observatorio Astronomico de Cordoba, Cordoba, Argentina 3 Observatorio Astronomico Nacional, San Ysidro, CA 3 Observatorio Astronomico Nacional, Cerro Calan, Chile 2 Observatorio Astronomico Nacional, Yebes, Spain 2 Observatorio Astronomico Nacional, Bogota, Columbia 2 Observatorio Astronomico Nacional de Cerro Calan, Santiago, Chile 2 Observatorio Astronomico Cerro Calan, Santiago, Chile 1 Roma, Osservatorio Astronomico, Monteporzio Catone, Italy 1 Osservatorio Astronomico, via Zamboni 33, 40126 Bologna, Italy 1 Osservatorio Astronomico di Trieste, Lactea, La Laguna, Spain 1 Osservatorio Astronomico di Capodimonte, Naples 1 Osservatorio Astronomico Nacional, Ensenada, Mexico 1 Observatorul Astronomie, Bucharest, Rumania 1 Observatorium Astronomiczne, Wroclaw, Poland 1 Observatorio Astronomico, Sao Jose dos Campos, Brazil 1 Observatorio Astronomico, Laprida 854, 5000, Cordoba, Argentina 1 Observatorio Astronomico de Madrid (O.A.N.-I.G.N.) Spain 1 Observatorio Astronomico Nacional, San Isidro, CA 1 Observatorio Astronomico La Silla, La Serena, Chile 1 Observatorio Astrofisico Brasileiro, Itajuba, Brazil 73 7 Nordisk Institut for Teoretisk Atomfysik, Copenhagen, Denmark 64 Nordisk Institut for Teoretisk Atomfysik, Copenhagen, Denmark 1 Nordisk Institute for Teoretisk Atomfysik, Copenhagen, Denmark 1 Nordisk Institut for Teoritisk Atomfysik, Copenhagen, Denmark 1 Nordisk Institut for Teoretisk Atomphysik, Copenhagen, Denmark 1 Nordisk Institut for Teoretisk Atomfysik 1 Nordisk Institut for Teoretisk Atmofysik, Copenhagen, Denmark 1 Nordisk Institut Teoretisk Atomfysik 74 59 Lab. for Space Research, Groningen, Netherlands 28 Lab. for Space Research, Leiden, Netherlands 18 Center for High Energy Astrophysics, Netherlands 9 Lab. for Space Research, Groningen, Netherlands 7 Univ. Basel, Binningen, Switzerland 7 SRON, Laboratory for Space Research, Groningen, Netherlands 7 Kapteyn Astronomical Institute, Groningen, Netherlands 7 Huygens Laboratory, Leiden, Netherlands 7 Danish Space Research Inst., Lyngby, Denmark 6 Univ. of Groningen, Groningen, Netherlands 6 Centre for High Energy Astrophysics, Netherlands 5 Laboratory for Space Research, Groningen, Netherlands 5 Kapteyn Laboratorium, Groningen, Netherlands 4 Kapteyn Astronomical Institute, Groningen, The Netherlands 4 Center for Space Research, Cambridge, MA, US 3 Univ. of Nijmegen, Nijmegen, The Netherlands 3 Univ. Groningen, Groningen, Netherlands 3 SRON, Lab. for Space Research, Groningen, Netherlands 3 SRON Laboratory for Space Research, Utrecht, The Netherlands 3 SRON Laboratory for Space Research Groningen, Groningen, Netherlands 3 MIT Center for Space Research, Cambridge, MA, US 3 Kapteyn Astronomical Inst., Groningen, Netherlands 2 University of Groningen, Groningen, Netherlands 2 SRON, Lab. for Space Research, Utrecht, Netherlands 2 Laboratory for Space Research, Leiden, The Netherlands 2 Inst. for Cosmic Research, Moscow, Russia 2 Dutch Meteor Society, Leiden, Netherlands 1 Utrecht, Rijksuniversitet, Netherlands 1 University for Space Research, Groningen, Netherlands 1 Univ. of Utrecht, Utrecht, The Netherlands 1 Space Telescope, Garching, Germany 1 Space Research Laboratory, Groningen, Netherlands 1 SRON-Groningen, Groningen, Netherlands 1 SRON, Space Research Lab., Utrecht, Netherlands 1 SRON, Space Research Lab., Groningen, Netherlands 1 SRON, Laboratory for Space Research, Leiden, Netherlands 1 SRON, Laboratory for Space Research, Groningen 1 SRON, Lab. for Space Research, Netherlands 1 SRON, Lab. for Space Research, Leiden, Netherlands 1 Laboratory for Space Research, Utrecht, Netherlands 1 Laboratory for Space Research, Groningen, The Netherlands 1 Laboratory for Space Research Utrecht, Utrecht, The Netherlands 1 Laboratory for Space Research Leiden, Leiden, Netherlands 1 Laboratory for Space Research Groningen, Groningen, Netherlands 1 Laboratory Astrophysics Leiden, Leiden, Netherlands 1 Lab. for Space Research Groningen, Netherlands 1 Kepteyn Astronomical Institute, Groningen, Netherlands 1 Kashima Space Research Center, Japan 1 Kapteyn Astron. Inst., Groningen, The Netherlands 1 Kapetyn Astronomical Inst., Groningen, Netherlands 1 Inst. for Space Research, Moscow, Russia 1 Huygens Laboratorium, Leiden, Netherlands 1 European Space Agency, Noordwijk, the Netherlands 1 European Space Agency, Noordwijk, The Netherlands 1 ESA, Space Science Dept., Delft, Netherlands 1 Danish Space Research Inst., Lyngby 1 Danish Space Research Inst., Denmark 1 Centre for High-energy Astrophysics, Netherlands 1 Asher Space Research Institute, Haifa 1 Asher Space Research Inst., Haifa 75 18 Canterbury, University, Christchurch, New Zealand 29 Canterbury, University, Christchurch, New Zealand 16 Carter Observatory, Wellington, New Zealand 15 Waikato, University, Hamilton, New Zealand 13 Mount John University Observatory, Christchurch, New Zealand 5 Mount John Observatory, Christchurch, New Zealand 2 Waikato Univ., Hamilton, New Zealand 2 University of Canterbury, Christchurch, New Zealand 2 Mount John Univ. Observatory, Christchurch, New Zealand 2 Leiden, State University, Observatory, Netherlands 2 Canterbury University, Christchurch, New Zealand 2 Canterbury Univ., Christchurch, New Zealand 1 Victoria University, Wellington, New Zealand 1 Victoria Univ., Wellington, New Zealand 1 Mt. John Observatory, Christchurch, New Zealand 1 Hitotsubashi University, Kunitachi, Tokyo, Japan 1 Christchurch, New Zealand 1 Canterbury, University, Christchuch, New Zealand 1 Auckland, University, Auckland, New Zealand 76 10 Inst. of Physical and Chemical Research, Wako, Japan 27 Institute of Physical and Chemical Research, Wako, Japan 10 Institute of Physical and Chemical Research, Saitama, Japan 10 Inst. of Physical and Chemical Research, Wako, Japan 4 The Institute of Physical and Chemical Research, Saitama, Japan 3 The Institute of Physics and Chemical Research, Saitama, Japan 2 The Inst. of Physical and Chemical Research, Saitama, Japan 2 RIKEN, the Institute of Physical and Chemical Research, Saitama, Japan 1 The Inst. of Physical and Chemical Research, Wako, Saitama, Japan 1 RIKEN (The Inst. of Physical and Chemical Research), Wako, Saitama, Japan 1 Inst. for Fundamental Chemistry, Kyoto, Japan 77 17 CNRS, Service d'Aeronomie, Verrieres-le-Buisson, France 25 CNRS, Service d'Aeronomie, Verrieres-le-Buisson, France 19 CNRS, Service d'Aeronomie, Verrieres-le-Buisson, Essonne, France 12 CEA, Centre d'Etudes de Bruyeres-le-Chatel, France 9 CNRS, Institut d'Astrophysique Spatiale, Verrieres-le-Buisson, France 4 Inst. d'Astrophysique Spatiale, Verrieres-le-Buisson, France 2 Service d'Aeronomie du CNRS, Verrieres-le-Buisso, France 2 Institut d'Astrophysique Spatiale, Verrieres-le-Buisson, France 2 CNRS, Verrieres le Buisso, France 2 CNRS, Laboratoire d'Aeronomie, Verrieres-le-Buisson, Essonne, France 1 Service d'Aeronomie, Verrieres-le-Buisso, France 1 Service d'Aeronomie, Verrieres-Le-Buisson, France, 1 Service d'Aeronomie du CNRS, France 1 CNRS, Service des Prototypes, Meudon, France 1 CNRS, Service d'Aeronomie, Verrieres-le-Buisson 1 CNRS, Service d'Aeronomie Verrieres-le-Buisson, France 1 CEA, Service d'Aeronomie, Verrieres-le-Buisson, France 1 CEA, Centre d'Etude de Bruyeres-le-Chatel, France 78 49 Rutherford Appleton Lab., Didcot, United Kingdom 59 Oxford Univ., United Kingdom 26 Southampton Univ., United Kingdom 26 Durham Univ., United Kingdom 23 Rutherford Appleton Lab., Didcot, United Kingdom 18 Sussex Univ., Brighton, United Kingdom 18 Birmingham Univ., United Kingdom 17 Belfast, Queen's Univ., United Kingdom 15 St. Andrews Univ., United Kingdom 14 Manchester, Victoria Univ., United Kingdom 14 Belfast Queen's Univ., United Kingdom 13 Armagh Observatory, United Kingdom 12 Manchester Victoria Univ., United Kingdom 9 London, Univ. College, Dorking, United Kingdom 9 Glasgow Univ., United Kingdom 8 Sheffield Univ., United Kingdom 7 Cardiff Univ. College, United Kingdom 6 London Univ. College, Dorking, United Kingdom 4 Rutherford Appleton Laboratory, Chilton, Didcot, UK 4 Rutherford Appleton Lab., Oxford, UK 4 Central Lancashire Univ., Preston, United Kingdom 3 Univ. College, Cardiff, United Kingdom 3 Sussex, University, Brighton, United Kingdom 3 St. Andrews, University, United Kingdom 3 Rutherford Lab., Chilton, UK 3 Rutherford Appleton Lab., Chilton, UK 3 Glasgow Univ. Observatory, United Kingdom 2 Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK 2 Hertfordshire Univ., Hatfield, United Kingdom 2 Hatfield Polytechnic, United Kingdom 2 Goldsmiths' College, London, United Kingdom 2 Cardiff, Univ. College, United Kingdom 1 Univ. of Wales, Cardiff, United Kingdom 1 Univ. College of Wales, Cardiff, United Kingdom 1 Saint Andrews Univ., United Kingdom 1 Rutherford Appleton Lab., Chilton, Oxfordshire, UK 1 Rutherford Appleton Lab., Chilton, Didicot, UK 1 Queen's Univ., Belfast, United Kingdom 1 Manley Observatory, United Kingdom 1 London Univ. Coll., Dorking, United Kingdom 1 Liverpool Polytechnic, United Kingdom 1 Kent Univ., Canterbury, United Kingdom 1 JET Joint Undertaking, Abingdon, United Kingdom 1 Institute of Astronomy, Cambridge, United Kingdom 1 Culham Lab., Abingdon, United Kingdom 1 Churchill College, Cambridge, United Kingdom 1 Cardiff, Wales Univ. College, United Kingdom 1 Belfast, Queens University, United Kingdom 1 Belfast, Queen's University, United Kingdom 1 Armagh Planetarium, United Kingdom 79 9 Univ. of Illinois at Urbana-Champaign, Urbana, IL, US 23 University of Illinois at Urbana-Champaign, Urbana, IL, US 17 Univ. of Illinois at Urbana-Champaign, Urbana, IL, US 17 Univ. of California at San Diego, La Jolla, CA, US 3 Univ. of Illinois at Urgana-Champaign, Urbana, IL, US 2 University of Illinois, Champaign, Urbana, IL, US 2 Univ. of California, Santa Barbara, Santa Barbara, CA, US 2 Ilinois Univ. at Urbana-Champaign, Urbana, IL, US 1 University of Illinois-at Urbana Champaign, Urbana, Illinois, US 1 University of Illinois Observatory, Urbana, Ill. 80 19 NOAA, Space Environment Laboratory, Boulder, Colo. 26 NOAA, Space Environment Laboratory, Boulder, CO 23 NOAA, Space Environment Laboratory, Boulder, Colo. 5 NOAA, Space Environment Lab., Boulder, CO 5 Argonne National Laboratory, Argonne, Ill. 4 Oak Ridge National Laboratory, Oak Ridge, Tenn. 4 NOAA, Space Environmental Laboratory, Boulder, CO 4 NOAA, Space Environment Laboratory, Boulder 4 Lawrence Berkeley Laboratory, Berkeley 3 NOAA, Space Environment Lab., Boulder 3 NOAA Space Environment Laboratory, Boulder, CO, US 2 NOAA, Space Environment Laboratory 2 NOAA, Environmental Research Laboratories, Boulder, Colo. 2 Mullard Space Science Laboratory, Dorking, England 2 Lawrence Berkeley Laboratory, Berkeley, CA 1 Space Environment Laboratory, Boulder, Colorado, US 1 Space Environment Lab., Boulder, CO, US 1 NOAA, Wave Propagation Laboratory, Boulder, Colo. 1 NOAA, Space Environment Laborabory, Boulder, CO 1 NOAA, Environmental Research Laboratories, Boulder, CO 81 10 NASA, Infrared Telescope Facility, Mauna Kea, HI 22 NASA, Infrared Telescope Facility, Mauna Kea, HI 3 U.K. Infrared Telescope, Hilo, HI 3 NASA, Infrared Telescope Facility, Hilo, HI 2 NASA, Infrared Telescope Facility, Honolulu, HI 1 U.K. Infrared Telescope Unit, Hilo, HI 1 NASA, Infrared Telescope Facility, Mauna Kea 1 NASA, Infrared Telescope Facility, Hilo 1 NASA, Infrared Analysis and Processing Center 1 NASA Infrared Telescope Facility, HI, US 1 Infrared Telescope Unit, Hilo, HI 82 38 USAF, Geophysics Laboratory, Hanscom AFB, MA 20 USAF, Geophysics Laboratory, Bedford, MA 14 USAF, Geophysics Laboratory, Hanscom AFB, MA 7 Hopkins Observatory, Williamstown, MA 6 USAF, Phillips Laboratory, Hanscom AFB, MA 6 USAF, Geophysics Laboratory, Bedford, Mass. 5 USAF, Phillips Lab., Hanscom AFB, MA 5 USAF, Geophysics Laboratory, Sunspot, NM 5 USAF, Geophysics Laboratory 5 Phillips Laboratory, Hanscom AFB, MA, US 4 USAF, Geophysics Laboratory, Hanscom AFB 2 USAF, Weapons Laboratory, Kirtland AFB, NM 2 USAF, Phillips Laboratory 2 Phillips Lab., Hanscom AFB, MA, US 1 USAF, Weapons Laboratory, Kirtland AFB, N. Mex. 1 USAF, Phillips Laboratory, Sunspot, NM 1 USAF, Phillips Lab., Sunspot, NM 1 USAF, Phillips Lab., Kirtland AFB, NM 1 USAF, Geophysics Laboratory, Sunspot, MN 1 USAF, Geophysics Laboratory, Los Angeles, Calif. 1 USAF, Geophysical Laboratory, Sunspot, NM 1 USAF, Avionics Laboratory, Wright-Patterson AFB, OH 1 USAF Philips Laboratory, Sunspot, NM, US 1 SSC Laboratory, Dallas, TX, US 1 SERC, Daresbury Laboratory, England 1 RIKEN Cosmic Ray Laboratory, Saitama, Japan 1 Phillips Laboratory, Sunspot, NM, US 1 Phillips Laboratory, Hanscomb AFB, MA, US 1 Phillips Lab., Hanscome AFB, MA, US 1 Phillips Lab. Geophysics Directorate, Hanscome AFB, MA, US 1 Nuclear Physics Laboratory, Oxford, UK 1 National Physical Laboratory, New Delhi, India 1 MIT, Lincoln Laboratory, Lexington, MA 1 H. H. Wills Physics Laboratory, Bristol, England 1 Forest Hills Laboratory, Washington, D.C. 1 Forest Hills Laboratories, Washington, DC 1 Cavedish Laboratory, Cambridge, UK 1 CSIRO, Radiophysics Laboratory, Marsfield, Australia 1 CSIRO, Cloud Physics Laboratory, Epping, Australia 83 27 NASA, Johnson Space Center, Houston, Tex. 33 NASA, Johnson Space Center, Houston, Tex. 19 NASA, Johnson Space Center, Houston, TX 12 Houston Baptist University, Houston, Tex. 10 NASA, Langley Research Center, Hampton, Va. 6 NASA, Johnson Space Center, Astrophysics Section, Houston, Tex. 5 Trenton State College, Trenton, N.J. 5 Fernbank Science Center, Atlanta, Ga. 4 NASA, Johnson Space Center 3 NASA, Johnson Space Center, Astrophysics Section 3 Lunar and Planetary Inst., Houston, TX, US 3 Kutztown State College, Kutztown, Pa. 3 DAEC, Meudon Cedex, France 3 CESR, Toulouse Cedex, France 3 Aerospace Corp., Los Angeles 2 NASA. Langley Research Center, Hampton, VA, US 2 NASA, Johnson Space Center, Houston 2 Matra Marconi Space France, Toulouse, France 1 Texas, University, Austin, NASA, Johnson Space Center, Houston, Tex. 1 Shell Development Corp., Houston, TX 1 Norwegian Space Centre, Oslo, Norway 1 National Space Council, Washington 1 NASA, Johnson Space Center, Space Physics Branch, Houston, Tex. 1 NASA, Astrophysics Div., Washington, D.C. 1 Lunar and Planetary Institute, Houston, Tex. 1 Lunar and Planetary Inst., Houston, TX 1 Houston Baptist College, Houston, Tex. 1 ESA, Space Science Dept., Noordwijk 84 34 AN SSSR, Fizicheskii Institut, Moscow, USSR 33 AN SSSR, Astronomicheskii Sovet, Moscow, USSR 26 Space Research Institute, Moscow, Russia 16 Akademiia Nauk SSSR, Fizicheskii Institut, Moscow, USSR 16 Akademiia Nauk SSSR, Astronomicheskii Sovet, Moscow, USSR 15 AN SSSR, Fiziko-Tekhnicheskii Institut, Leningrad, USSR 15 AN SSSR, Fizicheskii Institut, Moscow, USSR 12 AN SSSR, Institut Iadernykh Issledovanii, Moscow, USSR 10 AN SSSR, Institut Prikladnoi Matematiki, Moscow, USSR 9 Sternberg Astronomical Institute, Moscow, Russia 8 Space Research Inst., Moscow, Russia 6 Lebedev Physical Institute, Moscow, Russia 5 Sibirskii IZMIRAN, Irkutsk, USSR 4 AN KSSR, Astrofizicheskii Institut, Alma-Ata, Kazakh SSR 3 RAN, Fizicheskij Inst., Moscow, Russia 3 P.N. Lebedev Physical Institute, Moscow, Russia 3 Erevanskii Fizicheskii Institut, Yerevan, Armenian SSR 3 AN SSSR, Institut Fizicheskikh Problem, Moscow, USSR 3 AN SSSR, Astronomicheskii Institut, Moscow, USSR 2 Kurchatov Inst., Moscow, Russia 2 Akademiia Nauk SSSR, Fizicheskii Institut, Pushchino, USSR 2 AN SSSR, Institut Prikladnoi Fiziki, Gorki, USSR 2 AN SSSR, Fiziko-Tekhnicheskii Institut, St. Petersburg, USSR 2 AN ASSR, Fizicheskii Institut, Yerevan, Armenian SSR 1 RAN, Fizicheskii Inst., Moscow, Russia 1 RAN, Astronomicheskii Inst., Moscow, Russia 1 Moskovskii Inzhenerno-Fizicheskii Institut, Moscow, USSR 1 Moskovskii Inzhenerno-Fizicheskii Institut, Moscow, Russia 1 Akademiia Nauk SSR, Astronomicheskii Sovet, Moscow, USSR 1 AN USSR, Radioastronomicheskii Institut, Kharkov, Ukrainian SSR 1 AN SSSR, Institut Spektroskopii, Troitsk, USSR 1 AN SSSR, Institut Radiotekhniki i Elektroniki, Moscow, USSR 1 AN SSSR, Institut Problem Mekhaniki, Moscow, USSR 1 AN SSSR, Institut Fiziki Zemli, Moscow, USSR 1 AN SSSR, Institut Astronomii, Moscow, USSR 85 29 Univ. Nacional Autonoma de Mexico, Coyoacan 44 Univ. Nacional Autonoma de Mexico, Coyoacan 32 Univ. de Montreal, Montreal, Quebec, Canada 13 Universidad Autonoma de Madrid, Madrid, Spain 7 Seoul National Univ., Seoul, Korea 6 Univ. de Los Andes, Merida, Venezuela 4 Univ. Laval, Sainte-Foy, Quebec, Canada 3 Univ. Paris XI, Orsay Cedex, France 3 Univ. Nacional Autonoma de Mexico, Ensenada 3 Instituto de Astronomia, Mexico, Mexico 2 Seoul National Univ., Republic of Korea 2 Ist. Nazionale di Fisica Nucleare 1 Yunnan National College, Kunming, China 1 Unvi. Jagiellonski, Krakow, Poland 1 Universidad Nacional Autonoma de Mexi 1 Univ. of St Andrews, Fife, Scotland 1 Univ. Paris XI, Orsey Cedex, France 1 Univ. Paris 7, Meudon Principal, France 1 Univ. Observatory, Munich, Germany 1 Univ. Laval, Quebec, Quebec, Canada 1 Univ. Hassan II, Casablanca, Morocco 1 Univ. Federal Rio Grande de Sul, Brazil 1 Puebla, Univ. Autonoma, Mexico 1 Observatoire de Mexico, Mexico 1 National Research Council 1 Instituo de Astronomia, Mexico, Mexico 1 Inst. of Astronomy, Moscow, Russia 1 Inst. de Astronomia, Mexico 1 Inst. Nacional de Tecnica Aeroespacial, Madrid 1 CNR, Laboratorie di Fisica Cosmica 86 12 Eotvos Lorand Tudomanyegyetem, Budapest, Hungary 26 Konkoly Observatory, Budapest, Hungary 20 Eotvos Lorand Tudomanyegyetem, Budapest, Hungary 11 Konkoly Obszervatorium, Budapest, Hungary 3 Eotvos Lorand University, Budapest, Hungary 2 Lorand Eotvos University, Budapest, Hungary 2 Lorand Eotvos Univ., Budapest, Hungary 2 Institute of Isotopes, Budapest, Hungary 1 Satellite Geodetic Observatory, Budapest, Hungary 1 Kozmikus Geodeziai Obszervatorium, Budapest, Hungary 1 Konkoly Observatorium, Budapest, Hungary 1 Eotvos Lorand Univ., Budapest, Hungary 1 Budapesti Muszaki Egyetem, Budapest, Hungary 87 488 Stanford University, Stanford, Calif. 315 Maryland, University, College Park, Md. 291 Hale Observatories, Pasadena, Calif. 225 Maryland, University, College Park, MD 163 Lick Observatory, Santa Cruz, Calif. 120 Massachusetts, University, Amherst, Mass. 106 Tel Aviv University, Tel Aviv, Israel 96 Hawaii, University, Honolulu, Hawaii 87 Sydney, University, Sydney, Australia 80 Washington, University, Seattle, Wash. 79 Stanford University, Stanford, Calif. 78 Hawaii Univ., Honolulu 77 Maryland Univ., College Park 73 Nagoya University, Nagoya, Japan 55 Cornell Univ., Ithaca, NY 52 California Univ., La Jolla 51 Tohoku University, Sendai, Japan 51 Indiana University, Bloomington, Ind. 43 York University, North York, Canada 42 California Univ., Santa Barbara 41 Michigan State University, East Lansing, Mich. 40 Iowa, University, Iowa City, Iowa 40 Iowa, University, Iowa City, IA 39 Brigham Young University, Provo, UT 38 Yale University, New Haven, Conn. 38 Stanford Univ., Stanford, CA, US 37 Palomar Observatory, Pasadena, Calif. 35 Negev, University, Beersheba, Israel 34 Northwestern Univ., Evanston, IL, US 34 Indiana University, Bloomington, IN 33 Monash University, Clayton, Australia 32 Monash University, Clayton, Victoria, Australia 31 Columbia University, New York, NY, US 30 Salonika, University, Salonika, Greece 30 Athens, University, Athens, Greece 27 Sydney Univ., Australia 27 New Mexico, University, Albuquerque, NM 24 Northwestern Univ., Evanston, IL 24 California Univ., Santa Cruz 24 Alabama Univ., Tuscaloosa 23 Innsbruck, Universitaet, Innsbruck, Austria 22 Purdue University, West Lafayette, IN 22 Illinois, University, Observatory, Urbana, Ill. 21 McMaster Univ., Hamilton, Canada 20 Ohio State University, Columbus, Ohio 19 Southampton, University, Southampton, England 18 Western Ontario Univ., London, Canada 18 Utah, University, Salt Lake City, Utah 18 Tel Aviv Univ., Tel Aviv, Israel 18 Firenze, Univ., Florence, Italy 16 New Mexico, University, Albuquerque, N. Mex. 16 New Hampshire, University, Durham, N.H. 16 Florida Univ., Gainesville 15 York Univ., North York, Canada 15 Tokyo, University, Mitaka, Japan 14 Queensland, University, Brisbane, Australia 14 Nevada Univ., Las Vegas 13 Indiana University, Bloomington, IN, US 12 Villanova University, Villanova, PA, US 12 Vanderbilt University, Nashville, TN, US 12 Tromso, Universitetet, Tromso, Norway 12 Palermo, Universita, Palermo, Italy 12 New Brunswick, University, Fredericton, Canada 12 Kansas Univ., Lawrence 12 Hawaii Univ., Honolulu, HI, US 12 Drexel University, Philadelphia, PA 12 Alabama Univ., Huntsville 12 Aerospace Corp., Los Angeles, Calif. 11 Stanford University, Stanford, CA, US 11 Moscow University, Moscow, Russia 11 Madrid, Univ. Autonoma, Spain 10 Utah, University, Salt Lake City, UT 10 Trent University, Peterborough, Canada 10 Haystack Observatory, Westford, Mass. 10 Edinburgh Univ., United Kingdom 10 Brigham Young University, Provo, UT, US 9 York Univ., North York, Ontario, Canada 9 San Diego State University, San Diego, Calif. 9 Northern Arizona University, Flagstaff, AZ 8 Yale University, New Haven, CT, US 8 Utah, University, Salt Lake City 8 Tokai University, Hiratsuka, Japan 8 Karlova Universita, Prague, Czechoslovakia 7 Stockholm, Universitet, Stockholm, Sweden 7 Michigan State University, East Lansing, MI, US 7 Citta Univ., Catania, Italy 6 Wesleyan University, Middletown, CT, US 6 Toronto, University, Mississauga, Canada 6 The Hebrew University, Jerusalem, Israel 6 Rutgers Univ., Piscataway, NJ 6 Purdue University, West Lafayette, Ind. 6 Padova Univ., Padua, Italy 6 Nagoya University, Chikusa-ku, Nagoya, Japan 6 Missouri Univ., Saint Louis 6 Milano, Univ., Milan, Italy 6 Lund Observatory, Lund, Sweden 6 Leiden, Rijksuniversiteit, Sterrewacht 6 Hebrew University, Jerusalem, Israel 6 Cornell University, Ithaca, New York, US 6 Arkansas Univ., Fayetteville 6 Ankara, University, Ankara, Turkey 6 Aerospace Corp., El Segundo, Calif. 5 Wroclaw, Uniwersytet, Obserwatorium, Poland 5 Washington University, St. Louis, MO, US 5 Washington Univ., St. Louis, MO, US 5 Warszawa, Uniwersytet, Warsaw, Poland 5 Tsurumi University, Yokohama, Japan 5 Tokyo Gakugei University, Koganei, Japan 5 Tasmania Univ., Hobart, Australia 5 Sofiiski Universitet, Sofia, Bulgaria 5 Santander, Universidad, Santander, Spain 5 Rutgers University, New Brunswick, NJ 5 Oxford Univ., Oxford, UK 5 Oslo Univ., Blindern, Norway 5 Osaka University of Education, Japan 5 Ohio State University, Columbus, Ohio, US 5 Nagoya University, Toyokawa, Japan 5 Monash Univ., Clayton, Australia 5 Melbourne, University, Melbourne, Australia 5 Madrid, Univ. Complutense, Spain 5 Kyushu University, Fukuoka, Japan 5 Ege University, Izmir, Turkey 5 Citta Universitaria, Catania, Italy 5 Charles University, Prague, Czechoslovakia 5 Bogazici University, Istanbul, Turkey 5 Adelaide, University, Adelaide, Australia 4 Victoria Univ., Victoria, Canada 4 Utkal University, Bhubaneswar, India 4 Tufts University, Medford, MA, US 4 Texas Christian University, Fort Worth 4 Tel-Aviv University, Tel-Aviv, Israel 4 Tel Aviv, University, Tel Aviv, Israel 4 Southampton University, Southampton, England 4 Rutgers University, Piscataway, NJ, US 4 Pavia, Universita, Pavia, Italy 4 Orleans, Universite, Orleans, France 4 Odessa State University, Odessa, Ukraine 4 Oakland University, Rochester, MI 4 New York University, New York, NY, US 4 Nagoya University, Furocho, Japan 4 Mount Allison University, Sackville, Canada 4 Koyoto Sangyo University, Kyoto, Japan 4 Indiana, University, Bloomington, Ind. 4 Howard University, Washington, D.C. 4 G-Star Enterprises, Denver, CO 4 Durham Univ., Durham, UK 4 Cukurova University, Adana, Turkey 4 California, University, Davis and Livermore, Calif. 4 California State University, Fullerton, Calif. 4 CITA, Toronto, Ontario, Canada 4 Brigham Young University, Provo, Utah 4 Alaska, University, Fairbanks, Alaska 3 Zagreb Univ., Zagreb, Croatia 3 Yale University, Yale, CT, US 3 Yale Uniersity, New Haven, CT, US 3 Universite Laval, Quebec 3 Tulane University, New Orleans, LA 3 Tokyo, University, Sagamihara, Japan 3 Stazione Astronomica, Cagliari, Italy 3 Stanford Univ., Sandford, CA, US 3 St. Andrews Univ., Scotland, UK 3 Specola Vaticana, Vatican City 3 Southern California, University, Tucson, Ariz. 3 Shizuoka University, Shizuoka, Japan 3 Shanghai Jiao Tong University, Shanghai, China 3 Rutgers University, New Brunswick, N.J. 3 Penn State Univ., University Park, PA, US 3 Pahlavi University, Shiraz, Iran 3 Oranim-University Division, Tivon, Israel 3 Northwestern University, Evanston, Illinois, US 3 Newcastle, University, Newcastle, Australia 3 Nanjing Univ., Nanjing, China 3 Moscow Univ., Moscow, Russia 3 Missouri-St. Louis, University, St. Louis 3 Maryland University, College Park, MD 3 L'Aquila, Universita, L'Aquila, Italy 3 Keele University, Keele, Staffordshire, UK 3 Kanagawa University, Yokohama, Japan 3 Ioannina, University, Ioannina, Greece 3 Indiana University, Bloomington, Indiana, US 3 IBM Research Laboratory, San Jose, Calif. 3 George Mason University, Fairfax, VA, US 3 Genova, Univ., Genoa, Italy 3 Florida International Univ., Miami 3 Florida Atlantic University, Boca Raton, Fla. 3 Columbia University, New York, New York, US 3 Clemson University, Clemson, South Carolina, US 3 California Univ., San Diego 3 California State University, Northridge, Calif. 3 Calgary, University, Alberta, Canada 3 Beijing Normal University, Beijing, China 3 Aegean University, Bornova, Turkey 3 Academia Sinica, Nanjing, China 3 Academia Sinica, Kunming, China 3 Academia Sinica, Beijing, China 2 Yunnan University, Kunming, China 2 Wollongong, University, Wollongong, Australia 2 Wisconsin, University, Stevens Point, Wis. 2 Western Washington University, Bellingham, Wash. 2 Vilnius University, Vilnius, Lithuania 2 Villanova University, Villanova, Pennsylvania, US 2 Utsunomiya University, Utsunomiya, Japan 2 Trondheim Univ., Dragvoll, Norway 2 Tohoku Gakuin University, Sendai, Japan 2 Tohoku Gakuin Univ., Sendai, Japan 2 Thrace, Democritus University, Xanthe, Greece 2 Texas A & M University, College Station, Tex. 2 Tel Aviv University, Ramat Aviv, Israel 2 Strathclyde, University, Glasgow, Scotland 2 Sternwarte Sonneberg, Sonneberg, Germany 2 St. Petersburg University, St. Petersburg, Russia 2 South West Jiaotong University, Chengdu, China 2 Simon Frazer University, Burnaby, Canada 2 Shanghai Observatory, Shanghai, China 2 Shanghai Observatory, China 2 Seoul National University, Seoul, Korea 2 Seoul National University, Republic of Korea 2 Queen's Univ., Belfast, UK 2 Queen's Univ., Belfast, Ireland 2 Perdue University, West Lafayette, IN, US 2 Penn. State Univ., University Park, PA, US 2 Penn St. Univ., Univ. Park, PA, US 2 Peking Univ., Beijing, China 2 Pedagogical Univ., Zielona Gora, Poland 2 Padua Univ., Padova, Italy 2 Oxford University, Observatory, Oxford, England 2 Oslo Univ., Oslo, Norway 2 Osaka University, Toyonaka, Osaka, Japan 2 Osaka Kyoiku University, Osaka, Japan 2 Old Dominion University, Norfolk, VA 2 Oklahoma University, Norman, Okla. 2 Northern Iowa, University, Cedar Falls, Iowa 2 Northern Arizona University, Flagstaff, AZ, US 2 Niigata University, Niigata-shi, Japan 2 New York Univ., New York, NY, US 2 National Bureau of Standards 2 Napoli, Univ., Naples, Italy 2 Muenchen, Univ.-Sternwarte, Munich 2 Monash University, Melbourne, Australia 2 Millikin Univ., Decatur, IL 2 Milano Univ., Milan, Italy 2 Massachusetts, University Amherst, Mass. 2 Maryland University, College Park, Md. 2 Madurai-Kamaraj University, Madurai, India 2 Kutztown University, Kutztown, PA, US 2 King Saud Univ., Riyadh, Saudi Arabia 2 Kharkov University, Kharkov, Ukraine 2 Kagoshima University, Kagoshima, Japan 2 Jawaharlal Nehru University, New Delhi, India 2 Jagiellonian University, Krakow, Poland 2 JATE Univ., Szeged, Hungary 2 Iowa Univ., Iowa City, IA, US 2 Inonu Univ., Malatya, Turkey 2 Indiana Univ., South Bend, IN, US 2 Huazhong Normal University, Hubei, China 2 Huazhong Normal Univ., Wuhan, China 2 Hiroshima University, Takehara, Japan 2 Haifa Univ., Tivon, Israel 2 Granada, Universidad, Granada, Spain 2 Glasgow Univ., Glasgow, UK 2 General Atomic Co., San Diego, Calif. 2 Gdansk, Uniwersytet, Gdansk, Poland 2 G-star Enterprises, Denver, CO 2 Franche-Comte, Universite, Besancon, France 2 Eureka Scientific, Oakland, CA, US 2 Drake University, Des Moines, IA, US 2 Department of Physics, Oxford, UK 2 Denison University, Granville, Ohio 2 Colorado, University, Colorado Springs, Colo. 2 Charles Univ., Prague, Czechoslovakia 2 Centre Univ. d'Orsay, Orsay, France 2 Catholic University of America, Washington 2 Catania Univ., Catania, Italy 2 Brown University, Providence, R.I. 2 Brigham Young University, Provo, Utah, US 2 Brandeis Univ., Waltham, MA 2 Bishop's Univ., Lennoxville, Canada 2 Athens, National University, Athens, Greece 2 Athens Univ., Athens, Greece 2 Arkansas, University, Little Rock, AR 2 Aligarh Muslim University, Aligarh, India 2 Alberta Univ., Edmonton, Canada 2 Adelaide Univ., Australia 2 Academia Sinica, Taipei, Taiwan 2 Aarhus University, Aarhus C, Denmark 1 Yunnan Normal Univ., Kunming, China 1 York Univ., Ontario, Canada 1 Yildiz University, Istanbul, Turkey 1 Wyoming, University, University Station, WY 1 Wollongong Univ., Australia 1 Witwatersrand Univ., Wits, South Africa 1 Witwatersrand Univ., South Africa 1 Wittenberg Univ., Springfield, OH, US 1 Wisconsin-Parkside, University, Kenosha, Wis. 1 Wisconsin-Madison, University, Madison, Wis. 1 Western Ontario University, London, Canada 1 Western Carolina University, Cullowhee, NC, US 1 West Virginia University, Morgantown, WV 1 West Virginia University, Morgantown, W. Va. 1 Washington, University, St. Louis, MO 1 Washington University, Pullman, Wash. 1 Warszawa, Universytet, Warsaw, Poland 1 Valparaiso University, Valparaiso, IN, US 1 Utkal Univ., Bhubaneswar 1 Universitats-Sternwarte 1 Univ. of Mississippi, Oxford, MS, US 1 Univ. of Adelaide, S.A., Australia 1 Toronto, University, Scarborough, Canada 1 Toronto Univ., Ontario, Canada 1 Toronto Univ., Mississanga, Canada 1 Tokyo, University, Tanashi, Japan 1 Tohuku University, Sendai, Japan 1 Tohoku-Gakuin University, Tagajo, Japan 1 Tohoku Univ., Aoba-ku, Sendai, Japan 1 Tianjin Normal Univ., Tianjin, China 1 Thrace, University, Xanthi, Greece 1 Thrace, University, Xanthe, Greece 1 Theoretical Physics, Oxford, UK 1 Texas, University, Fort Davis, Tex. 1 Texas Univ., San Antonio 1 Texas A & M University, College Station 1 Temple University, Philadelphia, Pa. 1 Temple University, Philadelphia, PA 1 Tel-Aviv Univ., Tel-Aviv, Israel 1 Tel-Aviv Univ., Tel Aviv, Israel 1 Tel Avive University, Tel Aviv, Israel 1 Tel Aviv University, Ram-Aviv, Israel 1 Teikyo University, Utsunomiya, Japan 1 Technical Univ. of Denmark, Lyngby 1 Syracuse University, Syracuse, N.Y. 1 Sydney Univ., Sydney, Australia 1 Swansea, University College, Swansea, Wales 1 Strathclyde University, Glasgow, Scotland 1 Stockholm Univ., Stockholm, Sweden 1 StarStuff, Inc., Seattle 1 Stanford University, Medical Center, Stanford, Calif. 1 Stanford Linear Accelerator Center, Stanford, Calif. 1 Stanford Linear Accelerator Center, CA 1 Standord Univ., Stanford, CA, US 1 St. Paul's School, Concord, NH, US 1 Southern Colorado, University, Pueblo, CO 1 Southern California, Los Angeles, Calif. 1 Southern California University, Tucson, AZ 1 Southern California University, Los Angeles, Calif. 1 South Parks Road, Oxford, England 1 Sofia University, Sofia, Bulgaria 1 Silesian Univ., Opava, Czechoslovakia 1 Sidney, University, Sydney, Australia 1 Sheffield Hallam University, Sheffield, UK 1 Seoul National University, Seoul, South Korea 1 Saskatchewan, University, Saskatoon, Canada 1 Sarkanniemi OY, Tampere, Finland 1 Sao Paulo, Univ. do Estado, Brazil 1 Santa Maria, Universidade Federal 1 San Fernando Observatory, Northridge, Calif. 1 SRI International, Menlo Park, Calif. 1 Rice University, Houston, Texas, US 1 Ravishankar University, Raipur, India 1 Queensland, University, St. Lucia, Australia 1 Queensland, University, Saint Lucia, Australia 1 Pusan University, Republic of Korea 1 Pusan Univ., Pusan, Korea 1 Pusan National University, Pusan, Korea 1 Purdue University, West Lafayette, IN, US 1 Pedagogical University, Zielona Gora, Poland 1 Pedagogical University, Bydgoszcz, Poland 1 Panjab University, Chandigarh, India 1 Palermo, Universit1/4a, Palermo, Italy 1 Oranim Univ., Tivon, Israel 1 Old Dominion University, Norfolk, Va. 1 Okayama University, Okayama, Japan 1 Nuclear Physics Lab., Oxford, UK 1 Notre Dame, University, Notre Dame, Ind. 1 Northwestern Univ., Evanston, Il, US 1 Niigata University, Ikarashi, Japan 1 New South Wales, University, Sydney, Australia 1 New Mexico University, Albuquerque, NM 1 National Univ. of Singapore, Singapore 1 National Tsing Hua University, Hsinchu, Taiwan 1 National Central University, Chung-Li, Taiwan 1 Natal, University, Durban, South Africa 1 Napoli, Universit1/4a, Naples, Italy 1 Nagoya University, Chikusa-ku, Japan 1 Nagoya University, Chikusa, Japan 1 Nagoya Univ., Chikusa, Nagoya, Japan 1 Munich Univ., Munchen, Germany 1 Muenchen Univ., Munich, Germany 1 Mount Wilson Observatory, Pasadena, Calif. 1 Montpellier II, Universite, Montpellier 1 Memorial Univ., Corner Brook, Canada 1 Melbourne Univ., Australia 1 McGill Univ., Montreal, Canada 1 Massachusetts University, Amherst, Mass. 1 Martin Marietta Aerospace, Denver, Colo. 1 Macquarie University, North Ryde, Australia 1 Louvain, Catholic University, Heverlee, Belgium 1 Lomonosov Univ., Moscow, Russia 1 Lockheed Solar Observatory, Saugus, Calif. 1 Laurentian University, Sudbury, Ontario 1 Lamar University, Beaumont, Tex. 1 La Jolla Institute, La Jolla, Calif. 1 Kyushu University, Fukuoda, Japan 1 Kyoto University, Sakyoku, Kyoto, Japan 1 Kyoto University, Kyoto and Nara, Japan 1 Krakow, Uniwersytet, Obserwatorium, Poland 1 Krakow, Uniwersytet, Krakow, Poland 1 Kobe Women's University, Kobe, Japan 1 Kinki University, Higashi, Japan 1 King Saud university, Riyad, Saudi Arabia 1 King Saud University, Riyadh, Saudi Arabia 1 Kiel, Neue Universitaet, Sternwarte, Kiel 1 Keele, University, Keel, Staffs., England 1 Keele Univ., Keele, Staffordshire, England 1 John-Moores University, Liverpool, England, UK 1 Jagiellonian University, Cracow, Poland 1 JET Joint Undertaking, Abingdon, England 1 Interstellar Media, San Francisco, Calif. 1 Inonu University, Malatya, Turkey 1 Indiana University, Bloomington, IL 1 Illinois University, Observatory, Urbana, Ill. 1 Illinois Univ., Champaign 1 Hunan Normal Univ., Changsha, China 1 Hughes Aircraft Co., Fullerton, Calif. 1 Hong Kong Univ., Hong Kong 1 Hokkaido University, Sapporo 060, Japan 1 Hiroshima University, Hiroshima, Japan 1 Hirosaki University, Hirosaki, Japan 1 Himachal Pradesh University, Shimla, India 1 Hawaii, University, Kula, Maui, Hawaii 1 Hawaii University, Honolulu, Hawaii 1 Hale Observatories, Berkeley, Calif. 1 Haifa Univ., Haifa, Israel 1 Geoerge Mason University, Fairfax, VA, US 1 Genoa Univ., Genoa, Italy 1 General Radio Co., Concord, Mass. 1 Ford Observatory, Lakewood, CA 1 Florence Univ., Florence, Italy 1 Firenze Universita, Florence, Italy 1 EXOSAT Observatory, Noordwijk 1 Drexel University, Philadelphia, PA, US 1 Drake University, Des Moines, Iowa 1 Dikewood Corp., Los Angeles, Calif. 1 Delhi, University, New Delhi, India 1 DePauw University, Greencastle, IN 1 Cracow Pedagogical University, Krakow, Poland 1 Cornell University, Arecibo, P.R. 1 Comenius University, Slovakia, Czechoslovakia 1 Colorado, University, Boulder and Denver, Colo. 1 Clark Atlanta University, Atlanta, GA, US 1 Citta' Universitaria, Catania, Italy 1 Chungman National University, South Korea 1 Chulalongkorn Univ., Bangkok, Thailand 1 Chiba University, Inage-ku, Chiba, Japan 1 Charles University, Praha, Czechoslovakia 1 Charles University, Praha, Czech Republic 1 Charles Univ., Czech Republic 1 Changsha Railway Inst., China 1 Chalmers University of Technology, Sweden 1 Chaffey High School, Ontario, Canada 1 California, University, Santa Cruz and Livermore, Calif. 1 California, University, Santa Cruz and Livermore 1 California, University, Livermore and Berkeley, Calif. 1 California, University, Davis and Berkeley, Calif. 1 California, University, Berkeley and Livermore, Calif. 1 Calgary Univ., Calgary, Canada 1 Calgary Univ., Calgary, Alberta, Canada 1 Calgary Univ, Calgary, Canada 1 Brown University, Providence, RI 1 Brigham Young University, Laie, Hawaii 1 Brandon Univ., Brandon, Manitobe, Canada 1 Brandon Univ., Brandon, Manitoba, Canada 1 Brandon Univ., Brandon, Canada 1 Bogazici Univ., Istanbul, Turkey 1 Bihar, University, Muzaffarpur, India 1 Besancon, Universite, Besancon, France 1 Bendix Corp., Denver, Colo. 1 Banaras Hindu University, Varanasi, India 1 Attila Jozsef University, Szeged, Hungary 1 Atomenergi AB, Nykoping, Sweden 1 Athens, Academy, Athens, Greece 1 Athens University, Zografos, Greece 1 Arkansas, University, Little Rock, AK 1 Ankara University, Ankara, Turkey 1 Aichi University of Education, Kariya 1 Aegean University, Izmir, Turkey 1 Adler Planetarium, Chicago, Ill. 1 Adelaide, University, Adelaide , Australia 1 Academy of Artscience, Berkeley, Calif. 1 ANRAO, Parkes, Australia 88 14 Fermi National Accelerator Laboratory, Batavia, IL 20 Fermi National Accelerator Laboratory, Batavia, IL 5 Fermi National Accelerator Laboratory, Batavia, IL, US 3 NASA/Fermi National Accelerator Laboratory, Batavia, IL 3 NASA/Fermi National Accelerator Laboratory, Batavia 3 Fermi National Accelerator Lab., Batavia, IL, US 3 Fermi National Accelerator Lab., Batavia, IL 2 Communications Research Laboratory, Koganei, Japan 1 National Radio Astronomy Laboratory, Socorro, NM 1 National Aerospace Laboratory, Chofu, Japan 1 NASA. Fermi National Accelerator Lab., Batavia, IL, US 1 Fermi National Accelerator lab., Batavia, IL, US 1 Fermi National Accelerator Laboratory, Chicago, IL 1 Communications Research Laboratory, Kashima, Japan 1 Argonne National Laboratory, IL 89 116 Middlebury College, Middlebury, VT, US 17 Vanderbilt Univ., Nashville, TN, US 13 Rutgers Univ., Piscataway, NJ, US 13 George Mason Univ., Fairfax, VA, US 9 Villanova Univ., Villanova, PA, US 8 Williams College, Williamstown, MA 8 Univ. of Pittsburgh, Pittsburgh, PA, US 8 Colorado College, Colorado Springs 7 Inst. for Astronomy, Honolulu, HI, US 6 Wesleyan Univ., Middletown, CT, US 6 Wellesley College, Wellesley, MA, US 6 Middlebury College, Middlebury, VT, US 6 Michigan Univ., Ann Arbor, MI, US 6 Lewis and Clark College, Portland, OR, US 6 Hampden-Sydney College, Hampden-Sydney, VA, US 6 Gettysburg College, Gettysburg, PA, US 6 Drexel Univ., Philadelphia, PA, US 5 Wellesley College, Wellesley, Mass. 5 Florida Univ., Gainesville, FL, US 4 Washington Univ., Saint Louis, MO, US 4 The Citadel, Charleston, SC, US 4 Smith College, Northampton, Mass. 4 Smith College, Northampton, MA, US 4 Purdue Univ., West Lafayette, IN, US 4 Phillips Lab., Aberdeen, MD, US 4 Hughes STX Corp., Lanham, MD, US 4 Harvey Mudd College, Claremont, Calif. 4 Carleton College, Northfield, MN, US 3 Wesleyan Univ., Middletown, CT 3 Univ. of Pittsburg, Pittsburg, PA, US 3 U.W.-Madison, Madison, WI, US 3 Sweet Briar College, Sweet Briar, VA, US 3 New Alipore College, Calcutta, India 3 NASA. Goddard, Greenbelt, MD, US 3 Millikin Univ., Illinois, IL, US 3 Lewis and Clark College, Portland, OR 3 Hughes STX, Greenbelt, MD, US 3 Erindale College, Mississauga, Canada 2 Williams College, Williamstown, MA, US 2 Wellesley Coll., Wellesley, MA, US 2 Vassar College, Poughkeepsie, NY, US 2 Vanderbuilt Univ., Nashville, TN, US 2 Univ. of Pittsburg, Pittsburgh, PA, US 2 Univ. of Florida, Gainsville, FL, US 2 Union College, Schenectady, NY, US 2 Union College, Schenectady, N.Y. 2 Scarborough College, West Hill, Ontario 2 Randolph-Macon College, Ashland, VA 2 Presidency College, Calcutta, India 2 Planetary Science Inst., Tucson, AZ, US 2 Perkin-Elmer Corp., Danbury, CT 2 King College, Bristol, TN, US 2 Heidelberg Univ., Heidelberg, Germany 2 Erindale College, Missisauga, Canada 2 Colorado College, Colorado Springs, CO 2 Carnegie Mellon Univ., Pittsburgh, PA, US 2 Benedictine College, Atchison 1 Williams College, Williamstown, Mass. 1 Weedin Place, Seattle, WA, US 1 Vassar Coll., Poughkeepsie, NY, US 1 Vanderbilt Univ., Nahville, TN, US 1 Van Vleck Observatory, Middletown, CT, US 1 Univ. of Wisconsin, Eau Claire, WI, US 1 Univ. of San Diego, La Jolla, CA, US 1 Univ. of Edinburgh, Edinburgh, UK 1 Univ. College, Canberra, Australia 1 Univ. College, Campbell, Australia 1 Union College, Schenectady, NY 12308, USA 1 US Naval Academy, Annapolis, MD, US 1 Thomas More College, Fort Mitchell, Ky. 1 Thomas Moore College, Fort Mitchell, Ky. 1 St. Mary's Coll., Moraga, CA, US 1 St. Joseph College, West Hartford, CT, US 1 Scarborough College, Westhill, Ontario 1 Scarborough College, West Hill, Canada 1 Radiometrics, Inc., Henderson, NV, US 1 Radiometrics Inc., Henderson, NV, US 1 Phoenix Corp., McLean, Va. 1 Phillips Lab., Kirtland AFB, NM, US 1 Oslo College of Engineering 1 Northwest Analysis, Bozeman, MT, US 1 NorthWestNet, Bellevue, WA, US 1 NRAL Jodrell Bank, Cheshire, CT, US 1 NASA/GSFC, Greenbelt, MD, US 1 NASA-IRTF, Honolulu, HI, US 1 NASA-GSFC, Greenbelt, MD, US 1 Mount Holyoke College, South Hadley, MA 1 Millipore Corporation, Milford, MA, US 1 Manchester Univ., MacClesfield, UK 1 Los Angeles Harbor College, Wilimington, CA, US 1 Lehigh Univ., Bethlehem, PA, US 1 Keystone Junior College, La Plume, Pa. 1 Kennesaw State College, Marietta, GA, US 1 Jesus College, Cambridge CB5 0HA, UK 1 Intel Corporation, Beaverton, OR, US 1 Haverford College, Haverford, PA, 19041, USA 1 Hampden-Sydney College, Hampden-Sydney, VA 1 Gumma Technical College, Maebashi, Japan 1 Gemini Project, Tucson, AZ, US 1 Erindale College, Misissauga, Canada 1 Emmanuel College, Cambridge CB2 3AP 1 Eckerd College, St. Petersburg, FL 1 Eckerd College, Saint Petersburg, FL 1 Eastern Montana College, Billings, MT 1 Eastern College, St. Davids, PA, US 1 Cincinnati Univ., Cincinnati, OH, US 1 Case Western Univ., Cleveland, OH, US 1 Carleton College, Northfield, Minn. 1 Calvin College, Grand Rapids, Mich. 1 Caltech-JPL, Pasadena, CA, US 1 CTA Incorp., Rockville, MD, US 1 Butler Univ., Indianapolis, IN, US 1 Boston College, Newton Center, MA, US 1 Bendix Corp., Ann Arbor, Mich. 1 Ball Aerospace Corp., Boulder, CO, US 1 Agnes Scott College, Decatur, GA, US 1 AT&T Bell Lab., Holmdel, NJ, US 90 13 Saint Mary's University, Halifax, Nova Scotia, Canada 52 Saint Mary's University, Halifax, Canada 32 Calgary, University, Calgary, Alberta, Canada 17 Saint Mary's University, Halifax, Nova Scotia, Canada 9 Saint Mary's Univ., Halifax, Nova Scotia, Canada 4 Saint Mary's Univ., Halifax, Canada 3 St. Mary's University, Halifax, Canada 3 St. Mary's Univ., Halifax, Nova Scotia, Canada 1 St. Mary's University, Halifax, Nova Scotia, Canada 1 St. Mary's Univ. Halifax, Nova Scotia, Canada 1 St Mary's University, Halifax, Nova Scotia, Canada 1 Saint Mary's College of California, Moraga 1 Dalhousie University, Halifax, Nova Scotia, Canada 1 Dalhousie Univeristy, Halifax, Nova Scotia, Canada 91 9 Victoria, University, Victoria, British Columbia, Canada 61 Victoria, University, Victoria, British Columbia, Canada 4 Climenhaga Observatory, Victoria, British Columbia, Canada 3 Simon Fraser University, Burnaby, British Columbia, Canada 2 Victoria, University, Observatory, Victoria, British Columbia, Canada 2 University of Victoria, British Columbia, Canada 1 Victoria, University Observatory, Victoria, British Columbia, Canada 1 Univ. of Victoria, Victoria, British Columbia, Canada 1 Simon Frazer University, Burnaby, British Columbia, Canada 1 National Research Council, British Columbia, Canada 92 17 Dwingeloo, Radiosterrenwacht, Dwingeloo, Netherlands 28 Dwingeloo, Radiosterrenwacht, Dwingeloo, Netherlands 15 Westerbork, Radiosterrenwacht, Zwiggelte, Netherlands 3 Dwingeloo, Radiosterrewacht, Dwingeloo, Netherlands 2 Westerbork, Radiosterrewacht, Zwiggelte, Netherlands 2 Radiosterrewacht Westerbork, Zwiggelte, Netherlands 2 Radio Observatory, Dwingeloo, Netherlands 2 Delft, Technische Hogeschool, Netherlands 1 Westerbork, Radiosterrewacht Zwiggelte, Netherlands 1 Westerbork, Radiosterrenwacht, Hooghalen, Netherlands 1 Westerbork, Radiosterrenwacht Zwiggelte, Netherlands 1 Space Research Groningen, Netherlands 1 Radiosterrenwacht Westerbork, Zwiggelte, Netherlands 1 PTT Research, Groningen, Netherlands 1 Joint Inst. for VLBI in Europe, Dwingeloo, Netherlands 1 JIVE, Radiosterrenwacht Dwingeloo, Dwingeloo, The Netherlands 1 Dwingeloo Radiosterrenwacht, Dwingeloo, Netherlands 1 Dwingeloo Radio Observatory, Dwingeloo, Netherlands 93 14 Lausanne, Universite, Chavannes-des-Bois, Switzerland 43 Lausanne, Universite, Chavannes-des-Bois, Switzerland 11 Lausanne Univ., Chavannes-des-Bois, Switzerland 7 Basel Univ., Binningen, Switzerland 3 Lausanne, Universite, Lausanne, Switzerland 2 Universite de Lausanne, Chavannes-des-Bois, Switzerland 2 Universite de Lausanne, Chavannes-des Bois, Switzerland 2 Lausanne, Universite, Chavannes-des-Bois 2 Lausanne, Universite, Chavanne-des-Bois, Switzerland 2 Lausanne, Univ., Chavannes-des-Bois, Switzerland 1 Univ. de lausanne, Chavannes-des-Bois, Switzerland 1 Univ. de Lausanne, Chavannes-des-Bois, Switzerland 1 Lausanne, Universite, Chavannes-de-Bois, Switzerland 1 Lausanne, Universite, Chavannes des Bois, Switzerland 1 Lausanne Univ., Chavanne-des-Bois, Switzerland 94 60 Niels Bohr Institute, Copenhagen, Denmark 174 Liege, Universite, Cointe-Ougree, Belgium 39 Bartol Research Institute, Newark, DE 20 Univ. Tuebingen, Tuebingen, Germany 19 Copenhagen Univ. Observatory, Denmark 18 Dansk Rumforskningsinstitut, Lyngby, Denmark 18 Copenhagen Univ., Observatory, Denmark 16 Niels Bohr Institute, Copenhagen, Denmark 13 Florida Institute of Technology, Melbourne 11 Copenhagen University Observatory, Copenhagen, Denmark 10 Universitat Tuebingen, Tuebingen, Germany 9 Niels Bohr Inst., Copenhagen, Denmark 7 Univ. Muenchen, Muenchen, Germany 7 Danish Space Research Institute, Lyngby, Denmark 5 SETI Institute, Mountain View, CA 5 Copenhagen, University, Copenhagen, Denmark 5 Aarhus Univ., Aarhus, Denmark 4 Nordita, Copenhagen, Denmark 3 Yerevan Physics Institute, Yerevan, Armenia 3 Univ. of Tuebingen, Tuebingen, Germany 3 Niels Bohr Institute, Tollose, Denmark 3 NORDITA, Blegdamsvej 17, DK-2100 Copenhagen, Denmark 3 Max Planck Institute, Garching, Germany 3 Copenhagen, University Observatory, Copenhagen, Denmark 3 Copenhagen Univ. Observatory, Copenhagen K, Denmark 3 Astronomisches Institut, Tuebingen, Germany 2 Smithsonian Institution, Washington, DC, US 2 Smithsonian Institution, Amado, AZ, US 2 Smithsonian Institute, Washington, DC, US 2 Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen, Denmark 2 Niels Bohr Institute for Astronomy, Brorfeldevej, Denmark 2 Niels Bohr Inst. for Astronomy, Denmark 2 New Jersey Inst. of Technology, Newark 2 Max Planck-Institute, Garching, Germany 2 Liege, Universite, Cointe Ougree, Belgium 2 Copenhagen Univ., Copenhagen, Denmark 2 Copenhagen Univ. Observatory, Copenhagen, Denmark 1 University of Copenhagen, Copenhagen, Denmark 1 The Niels Bohr Institute, Copenhagen, Denmark 1 Sterrewacht Leiden, Leiden, Germany 1 Smithsonian Institution, Washington, DC 1 Ruhr-Univ., Bochum, Germany 1 Rostov State University, Copenhagen, Denmark 1 Radcliffe Bunting Institute, Cambridge, MA 1 P.N. Lebedev Physical Institute, Copenhagen, Denmark 1 NORDITA, Blegdamsvej 17, 2100 Copenhagen, Denmark 1 Max Planck Inst., Bonn, Germany 1 MPI fuer Astrophysik, Muenchen, Germany 1 Liege, Universite, Cointe-Dugree, Belgium 1 Indian Institute of Science 1 Geodaetisk Institut, Charlottenlund, Denmark 1 Franklin Institute, Swarthmore, Pa. 1 Eloret Institute, Moffett Field, CA 1 Dansk, Rumforskningsinstitut, Lyngby, Denmark 1 Danish Space Research Inst., Copenhagen, Denmark 1 Copenhagen, University, Copehagen, Denmark 1 Copenhagen University, Observatory, Copenhagen, Denmark 1 Biochemical Institute, Ahrensburg, West Germany 1 Battelle Memorial Institute, Columbus, Ohio 1 Astronomical Institute, Czech Republic 1 Aarhus Univ., Arhus C, Denmark 95 21 Frankfurt, Universitaet, Frankfurt am Main, West Germany 20 Kiel, Neue Universitaet, Sternwarte, Kiel, West Germany 19 Erlangen-Nuernberg, Universitaet, Erlangen, West Germany 12 Frankfurt, Universitaet, Frankfurt am Main, West Germany 7 Frankfurt, Universitaet, Frankfurt am Main, Federal Republic of Germany 4 Frankfurt, Universitaet, Frankfurt-am-Main, West Germany 3 Universitaet Frankfurt, Frankfurt/Main, Germany 3 Muenchen, Universitaetssternwarte, Munich, West Germany 2 Heidelberg, Universitat, Heidelberg, West Germany 2 Goethe-Univ., Frankfurt am Main, Germany 2 Fraunhofer-Institut, Freiburg im Breisgau, West Germany 2 Frankfurt, Universitaet, Frankfurt am Main 2 Frankfurt Univ., Frankfurt am Main, Germany 1 Wuppertal, Universitaet-Gesamthochschule, West Germany 1 Siegen, Universitaet-Gesamthochschule, West Germany 1 Kiel, Neue Universitat, Sternwarte, Kiel, West Germany 1 Kiel, Neue Universitaet, Stenwarte, Kiel, West Germany 1 Greifswald, Universitaet, Greifswald, East Germany 1 Freiburg, Universitaet, Freiburg im Breisgau, West Germany 1 Frankfurt am Main, Universitaet, Federal Republic of Germany 1 Erlangen-Nuernburg, Universitaet, Erlangen, West Germany 1 Erlangen-Nuernberg Universitaet, Erlangen, West Germany 96 61 Beijing Observatory, People's Republic of China 50 Yerkes Observatory, Williams Bay, Wis. 42 Beijing Observatory, People's Republic of China 27 Whitin Observatory, Wellesley, MA 24 Nanjing University, People's Republic of China 22 Purple Mountain Observatory, Nanjing, People's Republic of China 19 Beijing University, People's Republic of China 17 Nanjing University, Nanjing, People's Republic of China 14 Yunnan Observatory, Kunming, People's Republic of China 14 Beijing Astronomical Observatory, People's Republic of China 13 Beijing Normal University, People's Republic of China 13 Astronomical Observatory, Nanjing, People's Republic of China 12 Beijing Observatory, Beijing, People's Republic of China 12 Astronomical Observatory, Kunming, People's Republic of China 11 Yunnan Observatory, Kunming, China 10 Astronomical Observatory, Beijing, People's Republic of China 9 Leiden Observatory, Leiden, The Netherlands 8 Yunnan Observatory, Kumming, China 7 Perth Observatory, Bickley, Australia 6 Shanghai Observatory, People's Republic of China 5 Nanjing, University, People's Republic of China 5 Boyden Observatory, Bloemfontein, Republic of South Africa 5 Beijing Observatory, China 4 Yunnan Observatory, Kunming, Yunnan, China 4 Yonsei University Observatory, Seoul, Republic of Korea 4 Tianjin Normal University, People's Republic of China 4 Beijing Normal University, Beijing, People's Republic of China 3 Yonsei University, Seoul, Republic of Korea 3 Shaanxi Astronomical Observatory, Lintong, People's Republic of China 3 Lick Observatory, Mount Hamilton, CA 3 Lick Observatory, Mount Hamilton 3 Korea Astronomy Observatory, Taejon, Republic of Korea 3 Dunsink Observatory, Dublin, Republic of Ireland 3 Astronomical Observatory, Purple Mountain, People's Republic of China 2 Whitin Observatory, Wellesley 2 Tsing Hua University, Hsinchu, Republic of China 2 Shaanxi Observatory, Xian, People's Republic of China 2 Nanjing Normal University, People's Republic of China 2 Lick Observatory, Mount Hamilton, Calif. 2 Huazhong Normal University, Wuhan, People's Republic of China 2 Hickox Observatory, Chagrin Falls, Ohio 2 Fudan University, Shanghai, People's Republic of China 2 Beijing University, Beijing, People's Republic of China 2 Beijing Observatory, Beijing, China 1 Zhongshan University, Guangzhou, People's Republic of China 1 Yunnam Observatory, Kunming, People's Republic of China 1 Tuorla Observatory, Tuorla, Piikkio, Finland 1 Shanghai Observatory, Shanghai, People's Republic of China 1 Seoul National University, Seoul, Republic of Korea 1 Sejong University, Seoul, Republic of Korea 1 Perth Observatory, Perth, Australia 1 People's Republic of China 1 Nanjing Astronomical Instrument Factory, People's Republic of China 1 McLean Observatory, Incline Village, Nev. 1 Kyung Hee University, Seoul, Republic of Korea 1 Bosscha Observatory, Lembang, Java, Republic of Indonesia 1 Bejing University, People's Republic of China 1 Beijing Normal Observatory, Beijing, People's Republic of China 1 Beijing Astronomical Observatory, Huairou, People's Republic of China 1 Astronomical Observatory, Shanghai, People's Republic of China 1 Astronomical Observatory, Shaanxi, People's Republic of China 1 Astronomical Observatory, Nanjing, People's Republic of 97 50 McDonald Observatory, Texas Univ., Austin, TX, US 186 McDonald Observatory, Austin, TX 116 McDonald Observatory, Austin, Tex. 66 McDonald Observatory, Austin 33 McDonald Observatory, Fort Davis, Tex. 30 Lowell Observatory, Flagstaff, AZ, US 20 Univ. of Texas at Austin, Austin, TX, US 16 University of Texas at Austin, Austin, TX, US 16 McDonald Observatory, Fort Davis, TX 13 McDonald Observatory, Fort Davis 9 McDonald Observatory, Texas Univ., Austin, TX, US 6 Royal Observatory, Edinburgh, Scotland, UK 4 Steward Observatory, Arizona Univ., Tucson, AZ, US 4 Royal Observatory, Blackford Hill, Edinburgh, UK 4 Armagh Observatory, Armagh, N. Ireland, UK 3 US Naval Observatory, Flagstaff, AZ, US 3 Sunset Hills Observatory, Hacienda Hgts., CA, US 3 Royal Observatory Edinburgh, Edinburgh, UK 3 Palomar Observatory, Palomar Mountain, Calif. 3 Green Grove Observatory, Salt Lake City, UT, US 3 Florida International Univ., Miami, FL, US 2 Yerkes Observatory, Williams Bay, WI, US 2 Washburn Observatory, Wisconsin Univ., Madison, WI, US 2 University of Texas, Austin, Texas, US 2 Tuorla Observatory, Turku Univ., Pikkio, Finland 2 The University of Texas at Austin, Austin, TX, US 2 Pace Observatory, Pleasantville, NY, US 2 National Observatory of Athens, Athens, Greece 2 Mount Wilson Observatory, Mount Wislon, CA, US 2 Michigan Technological Univ., Houghton, MI, US 2 Lowell Observatory, Flagstaff, Arizona, US 1 Univ. of Texas, Austin, Austi, TX, US 1 U.S. Naval Observatory, Flagstaff Station, AZ, US 1 Tuorla Observatory, Turku Univ., Piikkio, Finland 1 The University of Texas, Austin, TX, US 1 The Univ. of Texas at Austin, Austin, TX, US 1 Steward Observatory, Austin, TX 1 Steward Observatory, Arizona Univ., Tucson, Az, US 1 Mount Wilson Observatory, Mount Wilson, CA, US 1 Midway Observatory, Brisbane, Australia 1 McDonald Observatory, Texas, University, Austin, TX 1 McDonald Observatory, Mount Locke, Tex. 1 McDonald Observatory, Mount Locke, TX 1 McDonald Observatory, Fort Davis, Texas, University, Austin, Tex. 1 McDonald Observatory, Austin, Texas 1 Limber Observatory, Pipe Creek, TX, US 1 Kiso Observatory, Tokyo Univ., Mitake, Japan 1 Jubilee Observatory, East Peoria, IL, US 1 Ege Univ. Observatory, Boronova, Izmir, Turkey 1 Corralitos Observatory, Las Cruces, NM, US 1 Armagh Observatory, Armagh, Ireland, UK 98 18 CNR, Gruppo Nazionale per l'Astronomia, Padua, Italy 21 CNR, Gruppo Nazionale per l'Astronomia, Padua, Italy 18 CNR, Gruppo Nazionale di Astronomia, Italy 13 CNR, Gruppo Nazionale di Astronomia, Catania, Italy 5 CNR, Gruppo Nazionale di Astronomia, Florence, Italy 4 CNR, Gruppo Nazionale per l'Astronomia, Padua 3 CNR, Gruppo Nazionale per l'Astronomia, Florence, Italy 3 CNR, Gruppo Nazionale per l'Astronomia, Catania, Italy 3 CNR, Gruppo Nazionale di Astronomia, Padua, Italy 3 CNR, Gruppo Nazionale di Astronomia 2 Dipartimento di Astronomia, Padova, Italy 2 CNR, Centro per l'Astronomia IR, Florence, Italy 1 Padova, Universita and CNR, Gruppo Nazionale di Astronomia, Padua, Italy 1 CNR, Gruppo Nazionale per l'Astronomia, Rome, Italy 1 CNR, Gruppo Nazionale per l'Astronomia, Naples, Italy 1 CNR, Gruppo Nazionale per l'Astronomia, Italy 1 CNR, Gruppo Nazionale di Astronomia, Naples, Italy 1 CNR, Gruppi Italiani di Fisica Cosmica, Palermo, Italy 1 C.N.R., Gruppo Nazional Astronomia, Firenze, Italy 99 13 Moskovskii Gosudarstvennyi Universitet, Moscow, USSR 65 Moskovskii Gosudarstvennyi Universitet, Moscow, USSR 3 Rostovskii Gosudarstvennyi Universitet, Rostov-on-Don, USSR 2 Leningradskii Gosudarstvennyi Universitet, Leningrad, USSR 2 Kievskii Gosudarstvennyi Universitet, Kiev, Ukrainian SSR 2 Erevanskii Gosudarstvennyi Universitet, Yerevan, Armenian SSR 1 Tartuskii Gosudarstvennyi Universitet 1 Moskovskii Gosudarstvennyi Universitet, Nauchny, Ukrainian SSR 1 Moskovskii Gosudarstvennyi Universitet, Moscow, Russia 1 Moskovskii Gosudarstvennyi Universitet, Moscow 1 Moskovskii Gosudarstvennyi Universitet, Krymskaia Stantsilya, Ukrainian SSR 1 Moskovskii Gosudarstvennyi Institut, Moscow, USSR 1 Kazanskii Gosudarstvennyi Universitet, Kazan, USSR 1 Gor'kovskii Gosudarstvennyi Universitet, Gorki, USSR 100 227 San Francisco State University, CA 173 California Univ., Berkeley 74 Massachusetts, University, Amherst, MA 59 Colorado Univ., Boulder 48 Wisconsin Univ., Madison 43 Washington Univ., Seattle 34 Massachusetts Univ., Amherst 30 New Mexico State Univ., Las Cruces, NM, US 30 David Dunlap Observatory 24 Aerospace Corp., Los Angeles, CA 23 Yale Univ., New Haven, CT 21 New Mexico State University, Las Cruces, NM, US 19 Hampden-Sydney College, VA 19 Bochum, Ruhr-Univ., Germany 17 Berlin, Technische Universitaet 16 The Ohio State University, Columbus, OH, US 15 Sachs/Freeman Associates, Inc., Bowie, MD 15 New Hampshire Univ., Durham 13 Paris VII, Univ., France 11 San Francisco State University, CA 11 Montpellier II, Univ., France 11 Lawrence Berkeley Laboratory 10 Tennessee State Univ., Nashville 9 Washington Univ., Saint Louis, MO 9 U.S. Naval Academy, Annapolis, MD 9 Tennessee State University, Nashville, TN, US 9 Southern California, University, Los Angeles 9 Oak Ridge National Laboratory, TN 9 Interferometrics, Inc., Vienna, VA 8 Vanderbilt Univ., Nashville, TN 8 New Mexico State Univ., Las Cruces 8 Bowling Green State University, OH 8 Berlin, Technische Univ., Germany 7 Washington State University, Pullman, WA 7 San Fernando Observatory, Northridge, CA 7 Laboratorium voor Ruimteonderzoek 7 Jerusalem, Hebrew University 7 Florida Atlantic University, Boca Raton 6 Washington State University, Pullman, Wash. 6 Southern California, University, Tucson, AZ 6 Montpellier II, Universite 6 Jerusalem Hebrew Univ., Israel 6 Imad-ad-Dean, Inc., Bethesda, MD 6 Groningen, Rijksuniversiteit 6 Florida International University, Miami 5 Univ. of Manchester, Cheshire, UK 5 Stephen F. Austin State University, Nacogdoches, TX 5 Sachs/Freeman Associates, Bowie, MD 5 Raman Research Institute 5 Radiophysics, Inc., Boulder, CO 5 Max Planck Society, Jena, Germany 5 Bochum, Ruhr-Universitaet 4 San Francisco State University, San Francisco, CA 4 SETI Institute, Moffett Field, CA 4 SETI Inst., Moffett Field, CA 4 Purdue Univ., West Lafayette, IN 4 Max-Planck-Gesellschaft, Germany 4 Groningen, State University 4 California Univ., Irvine 4 Brockport State College, NY 4 Athens, National University, Greece 4 Arkansas Univ., Little Rock 3 Wyoming Infrared Observatory 3 Western Connecticut State University, Danbury 3 Titan Systems, Inc., San Diego, CA 3 Tianjin Normal Univ., China 3 Southwest Texas State University, San Marcos, TX 3 San Francisco State University, San Francisco, Calif. 3 San Diego State University 3 SETI Institute, Los Altos, CA 3 Haystack Observatory, Westford 3 Forskningsinstitutet for Atomfysik 3 Florida Atlantic Univ., Boca Raton 3 Brown Univ., Providence, RI, US 3 Aix-Marseille I, Universite 2 Western Connecticut State University, Danbury, CT 2 Western Connecticut State Univ., Danbury 2 Valparaiso Univ., Valparaiso, IN, US 2 Utrecht, Rijksuniversiteit, Utrecht 2 USAF, Space Div., Los Angeles, CA 2 Titan Systems, Inc., La Jolla, CA 2 TRW, Inc., Redondo Beach, CA 2 Sternwarte Babelsberg, Potsdam 2 Sao Paulo, Univ., Brazil 2 San Francisco State Univ., San Francisco, CA, US 2 San Fernando Observatory 2 Saint Mary's Univ., Halifax 2 SRI International, Menlo Park, CA 2 Pisa, Scuola Normale Superiore 2 National Central Univ., Taiwan 2 Muenchen, Technische Universitaet, Munich 2 Missouri-St. Louis, University, MO 2 Missouri-Saint Louis, University 2 Missouri-Columbia, University, Columbia 2 Max Planck Institute for Astrophysics 2 Lawrence Berkeley Lab., Berkeley, CA 2 Laboratory for Space Research 2 Kyoto Pharmaceutical University, Japan 2 Krakow Pedagogical Univ., Poland 2 J. I. Holcomb Observatory 2 Intermetrics, Inc., Warminster, PA 2 Innsbruck Univ., Austria 2 Illinois Wesleyan University, Bloomington 2 Huazhong Normal Univ., Hubei, China 2 George Mason Univ., Fairfax, VA 2 General Atomic Co., San Diego, CA 2 Evergreen State College, Olympia, WA 2 ETA Systems, Inc., Saint Paul, MN 2 E-Systems, Inc., Dallas, TX 2 Drexel Univ., Philadelphia, PA 2 Chicago Adler Planetarium, IL 2 Bulgarian Academy of Sciences 2 Big Bear Solar Observatory 2 Berlin, Technische Universitaet, Berlin 2 Beckman Inst., Urbana, IL, US 2 Basilicata, Univ., Potenza, Italy 2 Astronomisches Inst., Germany 2 Aspen Center for Physics, CO 2 Apple Computer, Inc., Cupertino, CA 2 Alcala de Henares, Universidad, Spain 1 Yale Observatory, New Haven, CT 1 Wisconsin Univ., Milwaukee 1 Wisconsin Univ., La Crosse 1 Western Washington State University, Bellingham, WA 1 Western Ontario Univ., London 1 Western Montana College, Dillon 1 Washington State Univ., Pullman 1 Utrecht, Rijksuniversiteit 1 Utah Univ., Salt Lake City 1 U.S. Geological Survey, Denver, CO 1 U.S Naval Academy, Annapolis, MD 1 U.F.C., Fortaleza, Brazil 1 Sternwarte der Univ., Kiel, Germany 1 Sterling Software, Moffett Field, CA 1 Sterling Software, Inc., Palo Alto, CA 1 St. Petersburg State Univ., Russia 1 St. Francis Xavier Univ., Antigonish, Canada 1 Space Telescope Science Inst. 1 South Florida Univ., Tampa, FL 1 South Dakota State Univ., Brookings, SD, US 1 Simferopol State Univ., Ukraine 1 Shanghai Jiao Tong University 1 Sao Paulo, Pontificia Universidade Catolica 1 Santiago de Compostela, Universidad, Spain 1 Santa Barbara Astronomy Group, CA 1 San Juan Capistrano Research Inst., CA 1 San Joaquin Delta College, Stockton, CA 1 San Francisco State University, San Francisco 1 San Francisco State Univ., CA 1 Saint Lawrence Univ., Canton, NY 1 Sachs/Freeman Associates, Landover, MD 1 Sachs/Freeman Associates, Inc., Lanham, MD 1 Sachs/Freeman Associates, Inc. 1 Sachs-Freeman Associates, Inc., Bowie, MD 1 Sachs Freeman Associates, Inc., Bowie, MD 1 Sachs Freeman Associates, Bowie, MD 1 ST-ECF, Muenchen, Germany 1 SSC Laboratory, Dallas, TX 1 SOFRADIR, Veurey-Voroize 1 SLAC, Stanford, California, US 1 SETI Inst., Mountain View, CA 1 S.A.A.O., South Africa 1 R & D Associates, Marina Del Rey, CA 1 Planetary Society, Pasadena, CA 1 Planetary Science Institute, Pasadena, CA 1 Photon Research Associates, San Diego, CA 1 Pennsylavania State Univ., Fogelsville, PA, US 1 Paris X, Univ., Ville-d'Avray 1 Palomar Observatory Pasadena, CA 1 Orion Enterprises, Mountain View, CA 1 Oak Ridge National Lab., TN 1 Northeastern Univ., Boston, MA 1 New Mexico Sate Univ., Las Cruces, NM, US 1 New Jersey State Univ., Piscataway 1 National Solar Observatory 1 National Inst. for Nuclear Physics 1 NRAL, Macclesfield, Cheshire, UK 1 Monoptec Corp., San Francisco, CA 1 Missouri-Columbia Univ., Columbia 1 McCrone Associates, Westmont, IL 1 Max-Planck-Institut fuer R 1 Max-Planck-Institut fuer Aeronomie 1 Mashhad, Ferdowsi Univ., Iran 1 Lyon, Ecole Normale Superieure 1 Lick Observatory Santa Cruz, CA 1 Lick Obervatory, Santa Cruz, CA 1 Leuven, Katholieke Universiteit, Louvain 1 Leuven, Katholieke Universiteit, Heverlee 1 Lawrenceville Plasma Physics, NJ 1 Lawrence Berkeley Lab., CA 1 Lau Kuei Huat, Ltd., Singapore 1 Kongju National Univ., Korea 1 Kingston, Queen's University 1 Interferometrics, Inc., Vienna, PA 1 Indian Inst. of Science 1 Indian Inst. of Astrophysics 1 Illinois Univ., Chicago 1 Hughes Danbury Optical Systems, CT 1 Hughes Aircraft Co., El Segundo, CA 1 Hawaii Institute of Geophysics 1 Haute-Provence, Observatoire 1 Harvard-Smithsonian Cen 1 Hanscom Air Force Base, MA, US 1 Grenoble I Univ., France 1 General Atomics, San Diego, CA 1 Fernbank Science Center, Atlanta, GA 1 Fernbank Science Center 1 Felix Aguilar Observatory 1 East Tennessee State University, Johnson City, TN 1 EOS Technologies, Santa Monica, CA 1 Drake Univ., Des Moines, IA 1 Department of Mathematics 1 David Dunlop Observatory 1 Cracow Pedagogical Univ., Poland 1 Control Data Corp., Minneapolis, MN 1 Columbia Basin College, Pasco, WA 1 Claremont McKenna College, CA 1 Chonbulk National Univ., Korea 1 California Inst. of Technology 1 CERGA, Grasse, Alpes-Maritimes 1 Brussels Free Univ., Belgium 1 Bochum, Ruhr-Universitaet, Bochum 1 Bochum Ruhr-Univ., Germany 1 Berlin, Technische Unversitaet 1 Berlin, Technische Universitaet, West 1 Ball Aerospace Systems, Boulder, CO, US 1 Anton Paar KG, Graz, Austria 1 Admirals Walk, England, UK 101 11 Nuffield Radio Astronomy Labs., Jodrell Bank, United Kingdom 45 Nuffield Radio Astronomy Laboratories, Jodrell Bank, England 28 Nuffield Radio Astronomy Labs., Jodrell Bank, United Kingdom 5 Nuffield Radio Astronomy Laboratories, Cheshire, UK 4 Nuffield Radio Astronomy Observatory, Jodrell Bank, Ches., England 3 Nuffield Radio Astronomy Observatories, Jodrell Bank, England 3 Nuffield Radio Astronomy Labs., Manchester Univ., Manchester, UK 3 Nuffield Radio Astronomy Laboratories, Jodrell Bank, Chesire, UK 2 Nuffield Radio Astronomy Laboratory, Cheshire, UK 2 Nuffield Radio Astronomy Laboratories, Macclesfield, England 2 Nuffield Radio Astronomy Laboratories, Jodrell Bank, United Kingdom 2 Nuffield Radio Astronomy Lab., Cheshire, UK 102 23 Space Research Astronomical Observatory, Utrecht, Netherlands 40 Space Research Astronomical Observatory, Utrecht, Netherlands 26 National Astronomical Observatory, Tokyo, Japan 4 National Astronomical Observatory, Nagano, Japan 3 Uppsala Astronomical Observatory, Sweden 3 National Astronomical Observatory, Seoul, South Korea 2 SRON, Space Research Laboratory, Utrecht, Netherlands 2 Padua Astronomical Observatory, Padua, Italy 2 National Astronomical Observatory, Smoljan, Bulgaria 1 Warsaw Univ. Astronomical Observatory, Warsaw, Poland 1 Vinius Astronomical Observatory, Vilnius, Lithuania 1 Tartu Astronomical Observatory, Tartu, Estonian SSR 1 Space Research Organization Netherlands, Utrecht, The Netherlands 1 Space Research Astronomical Observatory, Groningen, Netherlands 1 Padua Astronomical Observatory, Padova, Italy 1 National Astronomical Observatory, Ohsawa, Japan 1 National Astronomical Observatory, Mizuswa, Japan 1 Nancy Lavender Astronomical Observatory, Georgetown, TX 1 Main Astronomical Observatory, Kiev, Ukraine 1 Kapteyn Astronomical Institute, The Netherlands 1 Collurania Astronomical Observatory, Teramo, Italy 1 Black Birch Astrometric Observatory, Blenheim, New Zealand 1 Astrophysical Observatory, Utrecht, Netherlands 1 Astronomical Inst., Ultrecht, Netherlands 103 7 Ministerio de Educacion de Chile, Instituto Isaac Newton, Santiago 23 Ministerio de Educacion de Chile, Instituto Isaac Newton, Santiago 14 Ministerio de Educacion de Chile, Instituto Isaac Newton, Santiago, Chile 8 Ministerio de Educacion, Instituto Isaac Newton, Santiago, Chile 2 Ministerio de Education de Chile, Instituto Isaac Newton, Santiago, Chile 1 Ministerio de Educacion, Instituto Isaac Newton 1 Ministerio de Educacion de Chile, Santiago de Chile, Chile 1 Ministerio de Educacion de Chile, Inst. Issac Newton, Santiago 104 13 Middle East Technical University, Ankara, Turkey 15 Middle East Technical University, Ankara, Turkey 13 Berlin, Technische Universitaet, West Germany 9 Middle East Technical Univ., Ankara, Turkey 2 Notre Dame Seishin University, Okayama, Japan 2 Nicolaus Copernicus University, Torun, Poland 1 Middle East Technology Univ., Ankara, Turkey 1 Middle East Tech, Univ., Ankara, Turkey 1 Istanbul Technical University, Istanbul, Turkey 1 Istanbul Technical Univ., Turkey 1 Delft, Technical University, Netherlands 1 Bilkent Univ., Ankara, Turkey 1 Athens, National Technical University, Greece 1 Athens, National Technical University, Athens, Greece 105 11 Virginia Polytechnic Institute and State University, Blacksburg, Va. 31 Virginia Polytechnic Institute and State University, Blacksburg, Va. 28 Virginia Polytechnic Institute and State University, Blacksburg 26 Virginia Polytechnic Institute and State University, Blacksburg, VA 3 Virginia Polytechnic Inst. and State Univ., Blacksburg, VA, US 2 Polytechnic Inst. & State Univ., Blacksburg, VA, US 1 Virginia, Polytechnic Institute and State University, Blacksburg, VA 1 Virginia Polytechnic and State University, Blacksburg, VA 1 Virginia Polytechnic Institute and State Univesity, Blacksburg, VA 1 Virginia Polytechnic Institute and State University, Charlottesville, VA 1 Virginia Polytechnic Institute and State University 1 Virginia Polytechic Institute and State University, Blacksburg, VA 106 20 Russian Academy of Sciences, Space Research Inst., Moscow, Russia 30 Russian Academy of Sciences, Space Research Inst., Moscow, Russia 5 Russian Academy of Sciences, Physical-Technical Inst., St. Petersburg, Russia 5 Russian Academy of Sciences, Inst. of Space Research, Moscow, Russia 4 Russian Academy of Sciences, Inst. for Problems in Mechanics, Moscow, Russia 3 Russian Academy of Sciences, Space Research Institute, Moscow, Russia 3 Russian Academy of Sciences, Inst. of Applied Mathematics, Moscow, Russia 3 Russian Academy of Sciences, Inst. for Nuclear Research, Moscow, Russia 2 Russian Academy of Sciences, Institute of Astronomy, Moscow, Russia 2 Russian Academy of Sciences, Institute for Space Research, Moscow, Russia 2 Russian Academy of Sciences, Inst. of Atmospheric Physics, Moscow, Russia 2 Academy of Sciences, Physical Institute, Moscow, Russia 1 Russian Academy of Sciences, Scientific Council on Cybernetics, Moscow, Russia 1 Russian Academy of Sciences, Institute of Space Research, Moscow, Russia 1 Russian Academy of Sciences, Institute of Earth Physics, Moscow, Russia 1 Russian Academy of Sciences, Institute for Astronomy, Moscow, Russia 1 Russian Academy of Sciences, Inst. of Physics of the Earth, Moscow, Russia 1 Russian Academy of Sciences, Inst. for Space Research, Moscow, Russia 1 Russian Academy of Sciences, Inst. for Astronomy, Moscow, Russia 1 Bulgarian Academy of Sciences, Space Research Inst., Sofia, Bulgaria 1 Austrian Academy of Sciences, Space Research Inst., Graz, Austria 107 21 Rensselaer Polytechnic Institute, Troy, N.Y. 64 Rensselaer Polytechnic Institute, Troy, NY 21 Rensselaer Polytechnic Institute, Troy, N.Y. 16 Planetary Science Institute, Tucson, AZ 7 Rensselaer Polytechnic Inst., Troy, NY, US 7 Rensselaer Polytechnic Inst., Troy, NY 5 Rensselaer Polytechnic Institute, Troy, NY, US 5 Lunar and Planetary Institute, Houston, TX 4 Rennselaer Polytechnic Institute, Troy, NY 3 Planetary Science Institute, Tucson, AZ, US 2 Lunar and Planetary Institute, Houston, TX, US 1 Virginia Military Institute, Lexington 1 Rensselaer Polytechnic Institute, Troy, New York, US 1 Rensselaer Polytechnic Institute, Troy 1 Rensselaer Polytechnic Institute, Hanscomb AFB, Massachusetts, US 1 Polytechnic Institute, Troy, NY, US 1 Planetary Science Institute, Tucson, Ariz. 1 Northwestern Polytechnic Univ., Fremont, CA, US 1 Molecular Research Institute, Palo Alto 1 Lunar and Planetary Institute, Tucson, AZ 1 Finnish Geodetic Institute, Finland 1 California State Polytechnic Institute, Pomona, CA 108 2 California, University, Los Alamos Scientific Laboratory, Los Alamos, N. Mex. 20 California, University, Los Alamos Scientific Laboratory, Los Alamos, N. Mex. 4 California, University, Los Alamos Scientific Laboratory, Los Alamos, NM 109 15 SRON, Laboratorium voor Ruimteonderzoek, Utrecht, Netherlands 49 Laboratorium voor Ruimteonderzoek, Utrecht, Netherlands 46 SRON, Laboratorium voor Ruimteonderzoek, Utrecht, Netherlands 10 SRON, Laboratorium voor Ruimteonderzoek 5 Laboratorium voor Ruimteonderzoek, Leiden, Netherlands 4 SRON, Laboratory for Space Research, Utrecht, Netherlands 4 SRON Laboratory for Space Research, Utrecht, Netherlands 3 SRON, Laboratorium voor Ruimteonderzoek, Leiden, Netherlands 2 SRON, Laboratorium voor Ruimteonderzoek, Utrecht 2 SRON, Laboratorium voor Ruimteonderzoek, Groningen, Netherlands 2 SRON Laboratorium voor Ruimteonderzoek, Utrecht, The Netherlands 2 Laboratorium voor Ruimteonderzoek, Groningen, Netherlands 1 SRON, Lab. voor Ruimteonderzoek, Groningen, Netherlands 1 Laboratorium voor Ruimteonderzoek, Netherlands 1 Laboratorium voor Ruimte-Onderzoek, Utrecht, Netherlands 1 Laboratorium Voor Ruimteonderzoek, Utrecht, Netherlands 110 17 Polish Academy of Sciences, Astronomical Center, Warsaw, Poland 24 Polish Academy of Sciences, Astronomical Centre, Warsaw, Poland 23 Polish Academy of Sciences, Astronomical Center, Warsaw, Poland 10 Polish Academy of Sciences, Astronomical Center, Torun, Poland 10 Nicolaus Copernicus Astronomical Center, Warsaw, Poland 7 Copernicus Astronomical Center, Warsaw, Poland 4 Polish Academy of Sciences, Space Research Centre, Warsaw, Poland 4 Copernicus Astronomical Center, Torun, Poland 3 N. Copernicus Astronomical Center, Warsaw, Poland 3 Copernicus Astronomical Center, Warszawa, Poland 2 Slovak Academy of Sciences, Astronomical Inst., Bratislava, Slovakia 2 Polish Academy of Sciences, Space Research Centre, Wroclaw, Poland 2 Polish Academy of Sciences, Space Research Center, Warsaw, Poland 2 Polish Academy of Sciences, Astronomical Centre, Torun, Poland 1 Polish Academy of Sciences, Space Research Center, Wroclaw, Poland 1 Polish Academy of Sciences, Institute of Mathematics, Warsaw, Poland 1 Polish Academy of Sciences, Astrophysics Laboratory, Torun, Poland 1 Polish Academy of Sciences, Astronomical Center, Warsow, Poland 111 4 Dominion Radio Astrophysical Observatory, Penticton, British Columbia, Canada 32 Dominion Radio Astrophysical Observatory, Penticton, British Columbia, Canada 3 Dominion Radio Astrophysical Observatory, Victoria, British Columbia, Canada 2 Dominion Radio Astrophysical Observatory, PO Box 248, Penticton, BC V2A 6K3, Canada 1 Dominion Radio Astrophysical Observatory, Penticon, British Columbia, Canada 112 9 Rio Grande do Sul, Universidade Federal, Porto Alegre, Brazil 52 Rio Grande do Sul, Universidade Federal, Porto Alegre, Brazil 17 Rio Grande do Sul, Univ. Federal, Porto Alegre, Brazil 5 Minas Gerais, Universidade Federal, Belo Horizonte, Brazil 3 Rio Grande do Norte, Universidade Federal, Natal, Brazil 2 Rio Grande do Sul, Universidade Federal, Porto Alegre 2 Rio Grande do Norte, Univ. Federal, Natal, Brazil 1 Rio Grande do Sul, Universidade, Federal, Porto Alegre, Brazil 1 Pernambuco, Universidade Federal, Recife, Brazil 1 Paraiba, Universidade Federal, Joao Pessoa, Brazil 113 16 American Science and Engineering, Inc., Cambridge, Mass. 23 American Science and Engineering, Inc., Cambridge, Mass. 5 Jamieson Science and Engineering, Inc., Scotts Valley 4 Jamieson Science and Engineering, Inc., Felton, CA 4 American Science and Engineering, Inc., Cambridge, MA 3 Jamieson Science and Engineering, Inc., Scotts Valley, CA 2 Jamieson Science and Engineering, Inc., Palo Alto, CA 2 Jamieson Science & Engineering, Inc., Scotts Valley, CA 2 American Science and Engineering, Inc., Arlington, MA 1 Jamieson Science and Engineering, Inc., Felton 1 Jamieson Science and Engineering, Inc. 1 Jamieson Science & Engineering, Inc., Scotts Valley, CA, US 1 Jamieson Science & Engineering, Inc., Scotts Valley 1 American Science and Engineering, Inc., Cambridge 1 American Science and Engineering, Inc., Cambrid 1 American Science and Engineering, Cambridge, Mass. 1 Agrivision Engineering, Inc., Davis, CA 114 4 Bureau des Longitudes, Service de Mecanique Celeste, Paris, France 33 Bureau des Longitudes, Service de Mecanique Celeste, Paris, France 2 Bureau des Longitudes, Service des Calculs et de Mecanique Celeste, Paris, France 1 Bureau des Longitudes, Service de Mechanique Celeste, Paris, France 1 Bureau des Longitudes, Service de Mecanique Ceeste, Paris, France 115 39 Univ. of British Columbia, Vancouver, BC, Canada 17 Univ. of British Columbia, Vancouver, BC, Canada 17 National Research Council, Victoria, BC, Canada 12 Univ. of Victoria, Victoria, BC, Canada 11 Univ. of Western Ontario, London, Ontario, Canada 11 Univ. of North Carolina, Chapel Hill, NC, US 11 Univ. of Calgary, Calgary, Alberta, Canada 8 University of Victoria, Victoria, BC, Canada 5 Univ. of Toronto, Mississauga, Ontario, Canada 5 Univ. of Montreal, Montreal, Quebec, Canada 5 Univ. of British Columbia, Vancouver, Canada 5 Univ. of British Columbia, BC, Canada 4 University of British Columbia, Vancouver, BC, Canada 4 Univ. of British Columbia, Vancover, BC, Canada 3 Univ. of Western Ontario, Ontario, Canada 3 NRC of Canada, Victoria, BC, Canada 2 University of British Columbia, Vancouver, B.C., Canada 2 University of British Columbia, British Columbia, Canada 2 Univ. of Wisconson, La Crosse, WI, US 2 Univ. of Wisconsin, La Crosse, WI, US 2 Univ. of Western Ontario, London, Canada 2 Univ. of Waterloo, Waterloo, Ontario, Canada 2 Univ. of South Wales, Canberra, Australia 2 Univ. de Montreal, Montreal, QC, Canada 1 Unviersity of British Columbia, Vancouver, BC, Canada 1 University of Victoria, Victoria, B.C., Canada 1 Univ. of Western Ontario London, Ontario, Canada 1 Univ. of Toronto, Richmond Hill, Ontario, Canada 1 Univ. of North Carolina, Capel Hill, NC, US 1 Univ. of Hawaii at Manoa, Honolulu, HI, US 1 Univ. of Calgary, Calgary, AB, Canada 1 Univ. of British Columbia, Victoria, BC, Canada 1 Univ. of British Columbia, Vancouver, British Colum., Canada 1 Univ. of British Columbia, Vancouver, BC, US 1 Univ. de Montreal, Montreal, BC, Canada 1 Tri Universities Meson Facility, Vancouver, Canada 1 National Research Council, Victoria, B.C., Canada 1 NRC, British Columbia, Canada 1 NRC of Canada, Victoria, B.C., Canada 1 College of New Caledonia, Prince George, BC, Canada 116 24 Astronomska Opservatorija, Belgrade, Yugoslavia 17 Astronomska Opservatorija, Belgrade, Yugoslavia 13 Astronomical Observatory, Belgrade, Yugoslavia 12 Institut za Fiziku, Belgrade, Yugoslavia 8 Bosscha Observatory, Lembang, Indonesia 8 Beograd, Univerzitet, Belgrade, Yugoslavia 6 Beograd, Astronomska Opservatorija, Belgrade, Yugoslavia 5 Hvar, Opservatorija, Zagreb, Yugoslavia 3 Zagreb, Sveuciliste, Zagreb, Yugoslavia 3 Napfizikai Obszervatorium, Debrecen, Hungary 3 Institute of Applied Physics, Belgrade, Yugoslavia 3 Hvar Opservatorija, Yugoslavia 2 Hvar Opservatorija, Zagreb, Yugoslavia 1 Vilnius Observatory, Vilnius, Lithuania 1 Institut za Nuklearne Nauke, Belgrade, Yugoslavia 1 Hvar, Opservatorij, Zagreb, Yugoslavia 1 Hvar Opservatorij, Hvar, Yugoslavia 1 Government Observatory, Bickley, Australia 1 Elektrotehnicki Institut, Zagreb, Yugoslavia 1 Astronomy Observatory of Padova, Padova, Italy 1 Astronomicka Observator, Ondrejov, Czechoslovakia 1 Astronomicheska Observatoriia, Stara Zagora, Bulgaria 1 Astronomical Observatory, Volgina 7, 11050 Belgrade, Yugoslavia 1 Astronomical Observatory, Volgina 7, 11050 Belgrade, Serbia, Yugoslavia 1 Astronomical Observatory, Prague, Czechoslovakia 117 20 Inst. Astronomico e Geofisico, Sao Paulo, Brazil 14 Univ. de Sao Paulo, Sao Paulo, Brazil 12 Inst. Astronomico e Geofisico, Sao Paulo, Brazil 9 Instituto Astronomico e Geofisico, Sao Paulo, Brazil 7 Complejo Astronomico El Leoncito, San Juan, Argentina 4 Instituto Astronomico e Geofisico da USP, Sao Paulo, Brazil 3 Instituto Nacional de Pesquisas Espaciais, Sao Paulo, Brazil 3 IAG-USP, Sao Paulo, Brazil 2 Universidade Estadual Paulista, Sao Paulo, Brazil 2 Univ. de Sao Paulo, Sao Paulo, Brasil 2 Inst. Nacional de Pasquisa Espaciais, Sao Paulo, Brazil 2 Complejo Astronomico el Leoncito, San Juan, Argentina 1 Museu de Astronomia e Ciencias Afins, Sao Cristovao, Brazil 1 Instituto de Fisica Teorica, Sao Paulo, Brazil 1 Instituto Astronomico e Geofisico/USP, Brasil 1 Instituto Astronomico e Geofisico, USP, Brazil 1 Instituto Astronomico e Geofisico da USP, San Paulo, Brazil 1 Inst. de Astronomia y Geodesia, Madrid 1 Inst. d'Astrophysique de Paris, CNRS, Paris, France 1 Complejo Astronomico El Leoncito, San Juan 1 Complejo Astronomico EL Leoncito, San Juan, Argentina 118 10 Bordeaux I, Universite, Observatoire, Floirac, Gironde, France 39 Bordeaux I, Universite, Observatoire, Floirac, France 19 Bordeaux I, Universite, Observatoire, Floirac, Gironde, France 8 Bordeaux, Universite, Observatoire, Floirac, Gironde, France 7 Bordeaux, Observatoire, Floirac, Gironde, France 7 Bordeaux I, Univ., Observatoire, Floirac, France 5 Bordeaux I, Universite, Talence, Gironde, France 1 Nice, Universite, Observatoire, Nice, France 1 Bordeaux, Universite, Observatoire, Floriac, Gironde, France 1 Bordeaux, Universite Observatoire, Floirac, Gironde, France 1 Bordeaux Univ., Observatoire, Floirac, France 119 15 Haute-Provence, Observatoire, Saint-Michel-l'Observatoire, Alpes-de-Haute-Provence, France 27 Haute-Provence, Observatoire, Saint-Michel-l'Observatoire, Alpes-de-Haute-Provence, France 4 Haute Provence, Observatoire, Saint-Michel-l'Observatoire, Alpes-de-Haute-Provence, France 3 Haute-Provence, Observatoire, Saint-Michel l'Observatoire, Alpes-de-Haute-Provence, France 3 Haute-Provence Observatoire, Saint-Michel-l'Observatoire, Alpes-de-Haute-Provence, France 1 Haute-Provence, Observatoire, Saint-Michel-l'Observatoire, Forcalquier, Basses-Alpes, France 1 Haute-Provence, Observatoire, Saint-Michel-l'Observatoire, Alpes-de-Hautes-Provence, France 1 Haute-Provence, Observatoire, Saint-Michel-l'Observatoire, Alpes-de-Haute-Provence 1 Haute-Provence, Observatoire, Saint-Michel-L'Observatoire, Alpes-de-Haute-Provence, France 1 Haute-Provence, Observatoire, Saint-Michel l'Observatoire, Alpes-de-Haut-Provence, France 1 Haute-Provence, Observatoire, Saint Michel-l'Observatoire, Alpes-de-Haute-Provence, France 1 Haute-Provence, Observatoire, Forcalquier, Alpes-de-Haute-Provence, France 1 Haute-Provence, Observatoire Saint-Michel-l'Observatoire, Alpes-de-Haute-Provence, France 1 Haute-Provence Observatoire, Saint-Michel l'Observatoire, Alpes-de-Haute-Provence, France 1 Haute Province, Observatoire, Saint-Michel-l'Observatoire, Alpes-de-Haute-Province, France 1 Haute Provence, Observatoire, Saint-Michel-L'Observatoire, Alpes-de-Haute-Provence 120 9 NASA, Marshall Space Flight Center, Space Science Laboratory, Huntsville, AL 28 NASA, Marshall Space Flight Center, Space Sciences Laboratory, Huntsville, Ala. 22 NASA, Marshall Space Flight Center, Space Science Laboratory, Huntsville, AL 11 NASA, Marshall Space Flight Center, Space Sciences Laboratory, Huntsville, AL 2 NASA, Marshall Space Flight Center, Space Science Laboratory 1 NASA, Marshall Space Flight Center, Space Sciences Laboratory, Huntsville 1 NASA, Marshall Space Flight Center, Space Science Laboratory, Huntsville, Ala. 1 NASA, Marshall Space Flight Center, Space Science Laboratory, Huntsville 1 NASA, Marshall Space Flight Center, Solar Sciences Branch, Huntsville, AL 1 NASA, Marshall Space Flight Center, Astrophysics Branch, Huntsville, Ala. 121 16 NASA, Goddard Space Flight Center, Laboratory for Optical Astronomy, Greenbelt, Md. 13 NASA, Goddard Space Flight Center, Theoretical Studies Group, Greenbelt, Md. 12 NASA, Goddard Space Flight Center, Laboratory for Optical Astronomy, Greenbelt, Md. 4 NASA, Goddard Space Flight Center, Cosmic Radiations Branch, Greenbelt, Md. 3 NASA, Goddard Space Flight Center, Infrared and Radio Astronomy Branch, Greenbelt, MD 2 NASA, Goddard Space Flight Center, Laboratory for Planetary Atmospheres, Greenbelt, Md. 2 NASA, Goddard Space Flight Center, Astrochemistry Branch, Greenbelt, Md. 1 NASA, Goddard Space Flignt Center, Laboratory for Solar Physics and Astrophysics, Greenbelt, Md. 1 NASA, Goddard Space Flight Center, Solar Radiation Office, Greenbelt, MD 1 NASA, Goddard Space Flight Center, Radio Astronomy Branch, Greenbelt, Md. 1 NASA, Goddard Space Flight Center, National Space Science Data Center, Greenbelt, Md. 1 NASA, Goddard Space Flight Center, Laboratory for Atmospheric Sciences, Greenbelt, MD 1 NASA, Goddard Space Flight Center, High Energy Physics Group, Greenbelt, Md. 1 NASA, Goddard Space Flight Center, High Energy Astrophysics Group, Greenbelt, Md. 1 NASA, Goddard Space Flight Center, Extraterrestrial Physics Laboratory, Greenbelt, Md. 1 NASA, Goddard Space Flight Center Operations Facility, Greenbelt, MD 1 (NASA, Goddard Space Flight Center, Theoretical Studies Group, Greenbelt, Md. 122 8 ESA, European Space Research and Technology Centre, Noordwijk, Netherlands 37 ESA, European Space Research and Technology Centre, Noordwijk, Netherlands 5 ESA, European Space Research and Technology Centre, Noordwijk 3 European Space Research and Technology Centre, Noordwijk, Netherlands 2 European Space Research and Technololgy Centre, Noordwij, Netherlands 2 ESA, European Space Research and Technology Center, Noordwijk, Netherlands 1 ESA, European Space Technology Centre, Noordwijk, Netherlands 1 ESA, European Space Science Dept., Noordwijk, Netherlands 1 ESA, European Space Research and Technology Centre, Madrid, Spain 123 34 CNR, Istituto di Technologie e Studio delle Radiazioni Extraterrestri, Bologna, Italy 23 CNR, Istituto di Tecnologie e Studio delle Radiazioni Extraterrestri, Bologna, Italy 16 CNR, Laboratorio di Tecnologie e Studio delle Radiazioni Extraterrestri, Bologna, Italy 8 CNR, Ist. di Studio e Tecnologie sulle Radiazioni Extraterrestri, Bologna, Italy 5 CNR, Istituto di Studio e Tecnologie sulle Radiazioni Extraterrestri, Bologna, Italy 5 CNR, Ist. di Tecnologie e Studio delle Radiazioni Extraterrestri, Bologna, Italy 4 CNR, Istituto di Studio e Tecnologie sulle Radiazioni Estraterrestri, Bologna, Italy 3 CNR, Laboratorio di Tecnologie e Studio delle Radiazioni Estraterrestri, Bologna, Italy 3 CNR, Istituto di Tecnologie e Studio delle Radiazione Extraterrestri, Bologna, Italy 2 CNR, Laboratorio di Technologie e Studio delle Radiazioni Extraterrestri, Bologna, Italy 2 CNR, Istituto di Tecnologie e Studio delle Radiazioni Extraterrestri, Florence, Italy 2 CNR, Istituto di Studio e Tecnologie sulle Radiazzioni Estraterrestri, Bologna, Italy 2 CNR, Istituto di Studio e Tecnologie sulle Radiazioni Extraterrestri, Italy 2 CNR, Istituto Tecnologie e Studio delle Radiazioni Extraterrestri, Bologna, Italy 2 CNR, Istituto Tecnologie e Studio Radiazioni Extraterrestri, Bologna, Italy 1 CNR, Laboratorio di Tecnologie e Studio delle Radiazioni Extraterrestri, Florence, Italy 1 CNR, Laboratorio di Tecnologie e Studio delle Radiazioni Extraterrestri 1 CNR, Laboratorio di Tecnologie e Studio delle Radiazioni Estraterrestri, Florence, Italy 1 CNR, Laboratorio di Tecnologie e Studio delle Radiazioni Estraterrestri 1 CNR, Laboratorio di Tecnologie e Studio Radiazioni Extraterrestri, Bologna, Italy 1 CNR, Laboratorio Tecnologie e Studio Radiazoni Extraterrestri, Bologna, Italy 1 CNR, Laboratorio Tecnologie e Studio Radiazioni Extraterrestri, Bologna, Italy 1 CNR, Istituto di Tecnologie e Studio delle Radiazioni Extraterrestri, Bologna 1 CNR, Istituto di Tecnologie e Studio Radiazioni Extraterrestri, Bologna, Italy 1 CNR, Istituto di Technologie e Studio delle Radiazzioni Estraterrestri, Bologna, Italy 1 CNR, Istituto di Technologie e Studio delle Radiazoni Extraterrestri, Bologna, Italy 1 CNR, Istituto di Technologie e Studio delle Radiazioni Extraterrestri, Bologna, Italy 1 CNR, Istituto di Technologie e Studio delle Radiazione Extraterrestri, Bologna, Italy 1 CNR, Istituto di Studio e Tecnologie sulle Radiazzioni Estraterrestri, Bologna 1 CNR, Istituto di Studio e Tecnologia sulle Radiazioni Extraterrestri, Italy 1 CNR, Ist. di Tecnologie e Studio delle Radiazioni Extraterrestri, Italy 1 CNR, Ist. di Tecnologie e Studio delle Radiazioni Extraterrestri, Bologna 1 CNR, Ist. di Studio e Tecnologie sulle Radiazioni Extraterrestri, Bologna 1 CNR, Ist. di Studio e Tecnologie delle Radiazioni Extraterrestri, Bologna, Italy 1 CNR, Ist. di Studio e Tecnologie delle Radiazioni Extraterrestri, Bologna 124 6 University of Science and Technology of China, Hefei, People's Republic of China 45 University of Science and Technology of China, Hefei, People's Republic of China 2 China University of Science and Technology, Beijing, People's Republic of China 1 University of Science and Technology, Hefei, People's Republic of China 1 University of Science and Technology of China, Hefei 1 China University of Science and Technology, Hefei, People's Republic of China 1 Chengdu University of Science and Technology, People's Republic of China 125 15 Astrophysics, Department of Physics, Keble Road, Oxford OX1 3RH, UK 14 Astrophysics, Department of Physics, Keble Road, Oxford OX1 3RH, UK 6 Astrophysics, Nuclear Physics Laboratory, Keble Road, Oxford OX1 3RH 5 Theoretical Physics, Department of Physics, 1 Keble Road, Oxford OX1 3NP 4 Department of Physics, Keble Road, Oxford OX1 3RH, UK 4 Astrophysics, Nuclear Physics Laboratory, Keble Road, Oxford OX1 3RH, UK 4 Astrophysics, Department of Physics, Keble Road, Oxford OX1 3RH 3 Theoretical Physics, Department of Physics, 1 Keble Road, Oxford OX1 3NP, UK 3 Astrophysics, Oxford University, Keble Road, Oxford OX1 3RH, UK 2 Department of Physics, Keble Road, Oxford OX1 3RH 2 Astrophysics, Oxford University, Keble Road, Oxford OX1 3RH 2 Astrophysics, Keble Road, Oxford OX1 3RH 1 Theoretical Physics, 1 Keble Road, Oxford OX1 3NP, UK 1 Dept. of Physics, Keble Road, Oxford, England, UK 1 Department of Astrophysics, Keble Road, Oxford OX1 3RH 1 Astrophysics, Nuclear Physics Building, Keble Road, Oxford OX1 3RH 126 3 Potchefstroom University for Christian Higher Education, Republic of South Africa 27 Potchefstroom University for Christian Higher Education, Republic of South Africa 6 Potchefstroom Univ. for Christian Higher Education, South Africa 1 Potchefstroom University for Christian Higher Education 127 9 Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT, UK 37 Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT, UK 8 Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT 4 Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking RH5 6NT 4 Mullard Space Science Laboratory, University College London, Holmbury Saint Mary, Dorking, Surrey RH5 6NT, UK 3 Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking RH5 6NT, Surrey, UK 2 Mullard Space Science Laboratory, Holmbury St Mary, Dorking, Surrey RH5 6NT, UK 1 Mullard Space Science Laboratory, University College London, Holmbury StMary, Dorking, Surrey RH5 6NT 1 Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking RH5 6NT, UK 1 Mullard Space Science Laboratory, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK 128 17 Observatories of the Carnegie Institution of Washington, Pasadena, CA 35 Observatories of the Carnegie Institution of Washington, Pasadena, CA 24 Observatories of the Carnegie Institution, Pasadena, CA 11 Observatories of the Carnegie Inst. of Washington, Pasadena, CA, US 6 The Observatories of the Carnegie Inst. of Washington, Pasadena, CA, US 4 Observatories of the Carnegie Institution, Pasadena, CA, US 3 Observ. of the Carnegie Inst. of Washington, Pasadena, CA, US 2 The Observatories of the Carnegie Institution of Washington, La Serena, Chile 2 Observatories of the Carnegie Institution, Pasadena 2 Observatories of the Carnegie Institution, La Serena, Chile 1 The Observatories, Carnegie Institution of Washington, Pasadena, CA, US 1 The Observatories, Carnegie Inst. of Washington, Pasadena, CA, US 1 The Observatories of the Carngegie Institution of Washington, Casilla 601, La Serena, Chile 1 The Observatories of the Carnegie Institution, La Serena, Chile 1 The Observ. of the Carnegie Inst. of Washington, Pasadena, CA, US 1 Observatories of the Carnegie Institution of Washington, La Serena, Chile 1 Observatories of the Carnegie Institution of Wash., Pasadena, CA, US 1 Observatories of the Carnegie Inst., Pasadena, CA, US 129 12 CNRS, Laboratoire de Physique Stellaire et Planetaire, Verrieres-le-Buisson, Essonne, France 63 CNRS, Laboratoire de Physique Stellaire et Planetaire, Verrieres-le-Buisson, Essonne, France 27 CNRS, Laboratoire de Physique Stellaire et Planetaire, Verrieres-le-Buisson, France 2 CNRS, Laboratoire de Physique Stellaire et Planetaire, Verrieres-Le-Buisson, Essonne, France 1 CNRS, Laboratorie de Physique Stellaire et Planetaire, Verrieres-le-Buisson, Essonne, France 1 CNRS, Laboratoire de Physique Stellaire et Planetaire, Verriers-le-Buisson, France 1 CNRS, Laboratoire de Physique Stellaire et Planetaire, Verrieres-le-Buissson, France 1 CNRS, Laboratoire de Physique Stellaire et Planetaire, Verrieres-le-Buisson, Essone, France 1 CNRS, Laboratoire de Physique Stellaire et Planetaire, Verrieres-le-Buisson France 1 CNRS, Laboratoire de Physique Stellaire et Planetaire, Verriees-le-Buisson, Essonne, France 1 CNRS, Laboratoire de Physique Stellaire et Planetaire Verrieres-le-Buisson, Essonne, France 1 CNRS, Laboratoire de Physique Satellaire et Planetaire, Verrieres le Buisson, France 1 CNRS Laboratoire de Physique Stellaire et Planetaire, Verrieres-le-Buisson, Essonne, France 130 11 Astronomisches Rechen-Institut, Heidelberg, West Germany 22 Astronomisches Rechen-Institut, Heidelberg, Federal Republic of Germany 16 Astronomisches Rechen-Institut, Heidelberg, West Germany 11 Astronomisches Rechen-Inst., Heidelberg, Germany 4 Astronomisches Rechen-Institut, Heidelberg, Germany 3 Astronomisches Recheninstitut, Heidelberg, West Germany 2 Astronomisches Inst. der Univ., Bamberg, Germany 2 Astronomiches Rechen-Institut, Heidelberg, Germany 1 Astronomishces Institut Wurzburg, Wurzburg, Germany 1 Astronomisches Recheninstitut, Heidelberg, Federal Republic of Germany 1 Astronomisches Rechen-Institut Monchhofstrabe, Heidelberg, Germany 1 Astronomisches Institut, Universitaet Basel 131 65 Max-Planck-Inst. fuer Kernphysik, Heidelberg, Germany 22 Max-Planck-Gesellschaft, Jena, Germany 17 Max-Planck-Institut fuer Kernphysik, Heidelberg, Germany 14 Kiepenheuer-Inst. fuer Sonnenphysik, Freiburg, Germany 13 Max-Planck-Inst. fuer Kernphysik, Heidelberg, Germany 13 Max-Planck-Inst. fuer Astrophysik, Garching, Germany 13 Max-Planck-Inst. fuer Aeronomie, Katlenburg-Lindau, Germany 8 MPI fuer Astronomie, Heidelberg, Germany 6 Max-Planck-Institute, Garching, Germany 6 Kiepenheuer-Institut fuer Sonnenphysik, Freiburg, Germany 5 Univ. Heidelberg, Heidelberg, Germany 5 Max-Planck Institute, Garching, Germany 4 Max-Planck-Inst. fuer Radioastronomie 4 Max Planck Institut, Garching, Germany 4 Inst. fuer Kernphysik, Karlsruhe, Germany 3 Max-Planck-Institut fuer Physik, Muenchen, Germany 3 Max-Planck-Institut fuer Kernphysik, Heidelberg 3 Kiepenheuer-Institut fuer Sonnephysik, Freiburg, Germany 3 Institut fuer Kernphysik, Kiel, Germany 2 Max-Planck-Institute for Astrophysics, Garching, Germany 2 Max-Planck-Institut fur Astrophysik, D-85740 Garching, Germany 2 Max-Planck-Institut fur Astrophysik, 85740 Garching, Germany 2 Max-Planck-Institut fuer Astrophysik, Germany 2 Max-Planck-Institut fuer Astrophysik, Gar 2 Max-Planck-Institut fuer Astronomie, Heidelberg 2 Max-Planck-Institut fuer Astronomie Koenigstuhl, Heidelberg, Germany 2 Max-Planck-Inst. fuer Physik und Astrophysik, Garching 2 Max-Planck-Inst. fuer Astrophysik, Muenchen, Germany 2 Max-Planck-Inst. fuer Astronomie Koenigstuhl, Heidelberg, Germany 2 Max-Planck Institut fur Astrophysik, D-85740 Garching, Germany 2 Max-Planck Inst. fuer Kernphysik, Heidelberg, Rep. of Germany 2 Max Planck Inst., Garching, Germany 2 MPI fuer Astrophysik, Garching, Germany 2 Keipenheuer-Institut fuer Sonnephysik, Freiburg, Germany 1 Max-Planck-Institute fur Astrophysik, 85740 Garching, Germany 1 Max-Planck-Institut, Garching, West Germany 1 Max-Planck-Institut, Garching, Germany 1 Max-Planck-Institut fur Kernphysik, W-69029 Heidelberg, Germany 1 Max-Planck-Institut fur Astrophysik, D-85740, Garching, Germany 1 Max-Planck-Institut fur Astronomie, Konigstuhl, Heidelberg, Germany 1 Max-Planck-Institut fur Astronomie, D-69117 Heidelberg, Germany 1 Max-Planck-Institut fuer Physik und Astrophysik 1 Max-Planck-Institut fuer Physik und Astro 1 Max-Planck-Institut fuer Astrophysik, Garching 1 Max-Planck-Institut fuer Astronomie Konigstuhl, Heidelberg, Germany 1 Max-Planck-Inst., Garching, Germany 1 Max-Planck-Inst. fuer Physik und Astrophysik 1 Max-Planck-Inst. fuer Extraterrestrische Physik 1 Max-Planck-Inst. fuer Astrophysik, Germany 1 Max-Planck-Inst. fuer Astrophysik, Garching, Muenchen, Germany 1 Max-Planck-Inst. fuer Astrophysik, Garching bei Munich, Germany 1 Max-Planck-Inst. fuer Astronomie, Heidelberg 1 Max-Planck-Inst. fuer Astronomie, Germany 1 Max-Planck-Inst fuer Astrophysik, Muenchen, Germany 1 Max-Planck-Inst fuer Astrophysik, Garching, Germany 1 Max-Planck Inst. fuer Astrophysik, Garching, Germany 1 Max-Planck Inst. fuer Astronomie, Heidelberg, Germany 1 Max Planck-Institut fuer Kernphysik, Heidelberg, West Germany 1 Max Planck Institut fuer Kernphysik, Heidelberg, Germany 1 Max Planck Institut fuer Aeronomie, Katlenburg-Lindau, Germany 1 Max Planck Inst. fuer Kernphysik, Heidelberg, Germany 1 Max Planck Inst. fuer Astronomie, Heidelberg, Germany 1 Max Planck Inst. for Astronomy, Heidelberg, Germany 1 MPI fuer Physik, Munich, Germany 1 Kiepenheuer-Institute fuer Sonnenphysik, Freiburg, Germany 1 Inst. fuer Theoretische Astrophysik, Heidelberg, Germany 132 17 Astrophysikalisches Institut Potsdam, Potsdam, Germany 15 Astrophysikalisches Institut Potsdam, Potsdam, Germany 10 Astrophysikalisches Inst. Potsdam, Potsdam, Germany 4 Astrophysical Inst. Potsdam, Potsdam, Germany 3 Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany 3 Astrophysikalisches Inst., Potsdam, Germany 2 Postdam Astrophysical Institute, Postdam, Germany 2 Astrophysikalisches Institut, Potsdam, Germany 2 Astrophysikalisches Institut Potsdamm, Potsdam, Germany 2 Astrophysikalisches Institut Potsdam, An der Sternwarte 16, Potsdam, Germany 2 Astrophysikalisches Institut Postdam, Postdam, Germany 1 Geo Forschungs Zentrum Potsam, Potsdam, Germany 1 Astrophysikalisches Onservatorium, Potsdam, Germany 1 Astrophysikalisches Institut und Univ-Sternwarte, Jena, Germany 1 Astrophysikalisches Institut Potsdam, Braunschweig, Germany 1 Astrophysikalisches Inst., Potsdam-Babelsberg, Germany 1 Astrophysikalisches Inst. Postdam, Potsdam, Germany 1 Astrophysical Institute, Potsdam, Germany 133 6 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA 30 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA 6 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore MD 21218, USA 2 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218, USA 1 Space Telescope Science Institute, 3700 San Martin Road, Baltimore, MD 21218, USA 1 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, U.S.A. 1 Space Telescope Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA 134 6 Science and Engineering Research Council, Rutherford Appleton Laboratory, Didcot, Oxon, England 44 Science and Engineering Research Council, Rutherford Appleton Laboratory, Didcot, Oxon, England 3 Science and Engineering Research Council, Rutherford Appleton Laboratory, Didcot, Oxon., England 3 Science and Engineering Research Council, Rutherford Appleton Laboratory, Didcot, Oxon 2 Science and Engineering Research Council, Rutherford and Appleton Laboratories, Didcot, Oxon, England 1 Science and Engineering Research Council, Rutherford and Appleton Laboratory, Didcot, Oxon, England 1 Science and Engineering Research Council, Rutherford Appleton Laboratories, Didcot, Oxon, England 135 9 Commonwealth Scientific and Industrial Research Organization, Div. of Radiophysics, Sydney, Australia 72 Commonwealth Scientific and Industrial Research Organization, Div. of Radiophysics, Sydney, Australia 8 Commonwealth Scientific and Industrial Research Organization, Epping, New South Wales, Australia 6 Commonwealth Scientific and Industrial Research Organization, Div. of Chemical Physics, Clayton, Victoria, Australia 4 Commonwealth Scientific and Industrial Research Organization, Div. of Applied Physics, Sydney, Australia 3 Commonwealth Scientific and Industrial Research Organization, National Measurement Laboratory, Sydney, Australia 1 Commonwealth Scientific and Industrial Research Organizaton, Div. of Chemical Physics, Clayton, Victoria, Australia 1 Commonwealth Scientific and Industrial Research Organization, Div., of Applied Physics, Lindfield, Australia 1 Commonwealth Scientific and Industrial Research Organization, Div. of Applied Physics, Lindfield, Australia 1 Commonwealth Scientific and Industrial Research Organization, Culgoora, Australia