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Two gamma-ray spectral classes of black hole transientsThe observation of seven transient black hole candidates by the oriented scintillation spectrometer experiment (OSSE) is reviewed: GRO J0422+32; GX 339-4; GRS 1716-249; GRS 1009-45; 4U 1543-47; GRO J1655-40, and GRS 1915+105. Two gamma ray spectral classes are apparent. The former three objects show Comptonized spectra with exponential cutoff at approximately 100 keV, while the latter four have fairly soft power law spectra. The Comptonized spectra appear to be associated with the X-ray low state, while the power law spectra appear to be associated with the X-ray high state.
Document ID
19970025761
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Grove, J. E.
(Hulburt (E. O.) Center for Space Research Washington, DC United States)
Kroeger, R. A.
(Hulburt (E. O.) Center for Space Research Washington, DC United States)
Strickman, M. S.
(Hulburt (E. O.) Center for Space Research Washington, DC United States)
Date Acquired
August 17, 2013
Publication Date
March 1, 1997
Publication Information
Publication: Proceedings of 2nd INTEGRAL Workshop 'The Transparent Universe'
Subject Category
Space Radiation
Accession Number
97N25231
Funding Number(s)
CONTRACT_GRANT: NASA Order S-10987-C
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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