TY - GEN
T1 - Ultraviolet, optical, and radio observations of the transient X-ray Source GRO J0422+32
AU - Shrader, C. R.
AU - Wagner, R. M.
AU - Starrfield, Sumner
AU - Hjellming, R. M.
AU - Han, X. H.
N1 - Funding Information:
The authors would like to thank Lingxin Chen, Bufa Zhang, Shuanghui Shi and their colleagues for their technical assistance with the irradiation. This work was supported, in part, by the National Science Foundation of China.
Publisher Copyright:
© 1993 American Institute of Physics.
PY - 1993
Y1 - 1993
N2 - 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.
AB - 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.
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U2 - 10.1063/1.44140
DO - 10.1063/1.44140
M3 - Conference contribution
AN - SCOPUS:84902865928
T3 - AIP Conference Proceedings
SP - 324
EP - 329
BT - Compton Gamma-Ray Observatory
A2 - Gehrels, Neil
A2 - Friedlander, Michael W.
A2 - Macomb, Daryl J.
PB - American Institute of Physics Inc.
T2 - Compton Symposium
Y2 - 15 October 1992 through 17 October 1992
ER -