X-ray and gamma-ray spectra of Cyg X-1 in the soft state
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🌌 astro-ph
keywords
softx-raydiskgamma-rayspectrastateaccretionalpha
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We present X-ray/gamma-ray observations of Cyg X-1 in the soft state during 1996 May-June. We analyze ASCA, RXTE and OSSE data. The spectrum consists of soft X-ray blackbody emission of an optically thick accretion disk in the vicinity of a black hole and a power law with an energy index alpha around 1.2-1.5 extending to at least several hundred keV. In the spectra, we find the presence of strong Compton reflection, which probably comes from the disk.
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