Observations of the Transient GRO JO422+32

Details Observations of the Transient GRO JO422+32 Observations of the Transient GRO JO422+32

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.4130w&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #41.30; Bulletin of the American Astronomical Society, Vol. 25, p.865

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Scientific paper

We present optical data (4000-7000 Angstroms/) of GRO J0422+32 taken with the 40-inch telescope at Lick Observatory. The X-ray and γ-ray transient was observed 2 September 1992, approximately one month after the reported detection by the Compton GRO BATSE experiment and two weeks after the identification of the optical counterpart. Preliminary analysis shows Hα and Hβ in emission as well as He II (4686 Angstroms/). In addition, Hβ shows broad absorption under a resolved emission core. Interstellar absorption lines are also present. We also report the nondetection of this object by the Extreme Ultraviolet Explorer satellite during the same time period. The implications of these observations are discussed and comparisons to other high energy transients are made. This work has been supported by NASA contract NAS5-30180.

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