[1] ESA IUE OBSERV,E-28080 MADRID,SPAIN
[2] UNIV PARIS 07,OBSERV PARIS,CNRS,URA 173,F-92195 MEUDON,FRANCE
[3] EUROPEAN SPACE TECHNOL CTR,EUROPEAN SPACE AGCY,DIV ASTROPHYS,ISO OBSERV,2200 AG NOORDWIJK,NETHERLANDS
[4] NASA,GODDARD SPACE FLIGHT CTR,COMP SCI CORP,ASTRON PROGRAM,GREENBELT,MD 20771
[5] JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,BALTIMORE,MD 21218
[6] UNIV CALIF LOS ANGELES,DEPT ASTRON,LOS ANGELES,CA 90024
[7] TEL AVIV UNIV,SCH PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL
[8] TEL AVIV UNIV,WISE OBSERV,IL-69978 TEL AVIV,ISRAEL
[9] OHIO STATE UNIV,DEPT ASTRON,COLUMBUS,OH 43210
[10] UNIV ROMA LA SAPIENZA,IST ASTRON,I-00161 ROME,ITALY
[11] EUROPEAN SO OBSERV,SANTIAGO 19001,CHILE
[12] NEW MEXICO STATE UNIV,DEPT ASTRON,LAS CRUCES,NM 88003
[13] UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720
[14] UNIV STERNWARTE,W-3400 GOTTINGEN,GERMANY
[15] SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218
[16] UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720
[17] UNIV NEBRASKA,DEPT PHYS & ASTRON,LINCOLN,NE 68588
[18] RUTHERFORD APPLETON LAB,ASTROPHYS GRP,DIDCOT OX11 0QX,OXON,ENGLAND
[19] NASA,GODDARD SPACE FLIGHT CTR,HIGH ENERGY ASTROPHYS LAB,GREENBELT,MD 20771
[20] UNIV MICHIGAN,DEPT ASTRON,ANN ARBOR,MI 48109
[21] INST ADV STUDY,PRINCETON,NJ 08540
[22] NASA,WASHINGTON,DC 20546
[23] GEORGIA STATE UNIV,DEPT PHYS & ASTRON,ATLANTA,GA 30303
[24] UNIV BRITISH COLUMBIA,DEPT ASTRON,VANCOUVER V6T 1W5,BC,CANADA
[25] UNIV FED RIO GRANDE SUL,INST FIS,DEPT ASTRON,BR-91500 PORTO ALEGRE,RS,BRAZIL
[26] INST ASTROFIS CANARIAS,E-38200 LA LAGUNA,SPAIN
[27] BOWLING GREEN STATE UNIV,DEPT PHYS & ASTRON,BOWLING GREEN,OH 43403
[28] UNIV CALIF SAN DIEGO,CTR ASTROPHYS & SPACE SCI,LA JOLLA,CA 92093
[29] AGNES SCOTT COLL,DEPT PHYS & ASTRON,DECATUR,GA 30030
[30] AGNES SCOTT COLL,BRADLEY OBSERV,DECATUR,GA 30030
[31] UNIV COLORADO,JOINT INST LAB ASTROPHYS,BOULDER,CO 80309
[32] UNIV COLORADO,NATL INST STAND & TECHNOL,BOULDER,CO 80309
[33] MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824
[34] UNIV CINCINNATI,DEPT PHYS,CINCINNATI,OH 45221
[35] UNIV TUBINGEN,INST ASTRON,W-7400 TUBINGEN,GERMANY
[36] UNIV WISCONSIN,DEPT ASTRON,MADISON,WI 53706
[37] OSSERV ASTRON BOLOGNA,I-40126 BOLOGNA,ITALY
[38] NATL CENT UNIV,ASTRON INST,CHUNGLI 32054,TAIWAN
[39] UNIV SCI & TECHNOL CHINA,HEFEI 230026,PEOPLES R CHINA