The first simultaneous X-ray/gamma-ray observations of Cyg X-1 by Ginga and OSSE

Preprint

12 December 1995

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/9512073

Abstract

We present the results of 4 simultaneous observations of Cygnus X-1 by Ginga and OSSE. 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 that energy, or by an exponentially cutoff power law and a second hard component.

Keywords

X RAY/GAMMA RAY
GINGA AND OSSE
POWER LAW
CYG X
OSSE

All Related Versions

Version 1, 1995-12-12, ArXiv
Version 1, 1996-10-21, ArXiv (Unconfirmed version)
Version 2, 1997-02-17, ArXiv (Unconfirmed version)

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