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The first simultaneous X-ray/gamma-ray observations of Cyg X-1 by Ginga and OSSEThe results of four simultaneous observations of Cygnus X-1 by Ginga and the orientated scintillation spectrometer experiment (OSSE) are presented. The X-ray/gamma ray spectra can be described by an intrinsic continuum and a component due to Compton reflection including an iron K alpha line. The intrinsic spectrum at X-ray energies is a power law with a photon spectral index of Gamma = 1.6. The intrinsic gamma ray spectrum can be phenomenologically described by either a power law without cutoff up to 150 keV and an exponential cutoff above this energy, or by an expoential cutoff power law and a second hard component.
Document ID
19970024537
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Gierlinski, Marek
(Jagellonian Univ. Cracow, Poland)
Zdziarski, A.
(Polish Academy of Sciences Warsaw, Poland)
Johnson, W. Neil
(Naval Research Lab. Washington, DC United States)
Philips, Bernard F.
(Naval Research Lab. Washington, DC United States)
Ebisawa, Ken
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Done, Chris
(Durham Univ. United Kingdom)
Date Acquired
August 17, 2013
Publication Date
February 1, 1996
Publication Information
Publication: Conference proceedings of the International Conference on X-Ray Astronomy and Astrophysics
Subject Category
Astronomy
Accession Number
97N24294
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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