Ultraviolet, optical, and radio observations of the transient X-ray Source GRO J0422+32

C. R. Shrader, R. M. Wagner, Sumner Starrfield, R. M. Hjellming, X. H. Han

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


We have monitored the early evolution of the transient X-ray source GRO J0422+32 from approximately 2 weeks post-discovery and into its early decline phase at ultraviolet, optical, and radio wavelengths. Optical and ultraviolet spectra, obtained with the Perkins 1.8-m telescope and with IUE respectively, exhibit numerous, but relatively weak, high-excitation emission lines such as those arising from He II, N III, N V, and C IV superposed on a very blue continuum. We find that the ultraviolet and optical characteristics of GRO J0422+32 as well as its radio evolution, are similar to other recent well-observed X-ray novae or soft X-ray transients such as Cen X-4, V616 Mon, and Nova Muscae 1991, which suggests that GRO J0422+32 is also a member of that subclass of low mass X-ray binaries (LMXBs). Further observations as GRO J0422+32 declines into quiescence wilt be required to determine whether the compact object is a neutron star or a black hole.

Original languageEnglish (US)
Title of host publicationCompton Gamma-Ray Observatory
EditorsNeil Gehrels, Michael W. Friedlander, Daryl J. Macomb
PublisherAmerican Institute of Physics Inc.
Number of pages6
ISBN (Electronic)1563961040
StatePublished - 1993
EventCompton Symposium - St. Louis, United States
Duration: Oct 15 1992Oct 17 1992

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


ConferenceCompton Symposium
Country/TerritoryUnited States
CitySt. Louis

ASJC Scopus subject areas

  • General Physics and Astronomy


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