The 1996 Outburst of GRO J1655-40: II Broad-Band Spectral Properties

Details The 1996 Outburst of GRO J1655-40: II Broad-Band Spectral Properties The 1996 Outburst of GRO J1655-40: II Broad-Band Spectral Properties

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.3503s&link_type=abstract

American Astronomical Society, 189th AAS Meeting, #35.03; Bulletin of the American Astronomical Society, Vol. 28, p.1314

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on observations of the recent outburst of the X-ray nova GRO J1655-40 made using the Rossi X-Ray Timing Explorer, the Hubble Space Telescope and the Compton Gamma-Ray Observatory. Spectra over the RXTE/PCA soft-X-ray band, and in the HST/FOS near ultraviolet are presented for the early phase of the outburst when the source was extremely soft - it went undected by CGRO/BATSE above 20 keV despite a 3-Crab intensity over the nominal 2-20 keV band covered by the RXTE/PCA. Later, over the course of the outburst the hard X-rays turned on, and a composite broad-band X-ray spectrum can be constructed. The source continued to brighten in the hard-X-ray band over the next month, and remained bright for several months. Implications of the spectral evolution are considered in the context of current models for the broad-band emission of X-ray novae outbursts.

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