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The 1989 Outburst of V404 Cygni: A Very Unusual X-Ray Nova

Published online by Cambridge University Press:  12 April 2016

R. M. Wagner ,
S. Starrfield ,
A. Cassatella ,
R. Gonzalez-Riestra ,
T. J. Kreidl ,
S. B. Howell ,
R. M. Hjellming ,
X.-H. Han ,
C. Shrader  and
G. Sonneborn
...Show all authors
R. M. Wagner
Affiliation:
Department of Astronomy, The Ohio State University
S. Starrfield
Affiliation:
IGPP and Theoretical Division, Los Alamos National Laboratory and Department of Physics and Astronomy, Arizona State University
A. Cassatella
Affiliation:
ESA IUE Observatory, VILSPA
R. Gonzalez-Riestra
Affiliation:
ESA IUE Observatory, VILSPA
T. J. Kreidl
Affiliation:
Lowell Observatory
S. B. Howell
Affiliation:
Planetary Science Institute
R. M. Hjellming
Affiliation:
National Radio Astronomy Observatory
X.-H. Han
Affiliation:
National Radio Astronomy Observatory
C. Shrader
Affiliation:
IUE Observatory, Goddard Space Flight Center
G. Sonneborn
Affiliation:
Laboratory for Astronomy and Solar Physics, Goddard Space Flight Center
G. W. Collins
Affiliation:
Department of Astronomy, The Ohio State University
R. Bertram
Affiliation:
Department of Astronomy, The Ohio State University
M. W. Buie
Affiliation:
Space Telescope Science Institute
H. E. Bond
Affiliation:
Space Telescope Science Institute
J. Johnson
Affiliation:
School of Physics and Astronomy, University of Minnesota
T. Harrison
Affiliation:
School of Physics and Astronomy, University of Minnesota
R. D. Gehrz
Affiliation:
School of Physics and Astronomy, University of Minnesota
F. A. Córdova
Affiliation:
Earth and Space Sciences Division, Los Alamos National Laboratory
P. Szkody
Affiliation:
Department of Astronomy, University of Washington
B. Margon
Affiliation:
Department of Astronomy, University of Washington
J. MacDonald
Affiliation:
Department of Physics and Astronomy, University of Delaware
R. Fried
Affiliation:
Braeside Observatory

Abstract

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On May 22, 1989 the Japanese Ginga Team discovered a new X-ray source that was cataloged as GS 2023+338. This source was subsequently identified as coincident in position with a previously known nova cataloged as V404 Cygni. Its last recorded outburst was in 1938 when it rose to about 12th mag. Spectroscopic data were obtained and confirmed the nature of the outburst. Additional ground based data were obtained by us at CTIO and the VLA. The X-ray behavior of this object has been reported to be very unusual and it reached a peak of about 17 crab about one week after discovery. Since then it has varied widely in magnitude at all wavelengths at which it has been studied. We present a brief summary of the observations that have been obtained up to the time of the meeting and shortly thereafter.

Type
4. Related Objects
Information
International Astronomical Union Colloquium , Volume 122: Physics of Classical Novae , 1990 , pp. 429 - 430
Copyright
Copyright © Springer-Verlag 1990