A study of RXTE and BeppoSAX observations of Cyg X-3

Details A study of RXTE and BeppoSAX observations of Cyg X-3 A study of RXTE and BeppoSAX observations of Cyg X-3

2004-01-14

arxiv.org/abs/astro-ph/0401265v1

Astronomy and Astrophysics

Astrophysics

4 pages, 7 figures, to appear in the Proceedings of the Conference "X-Ray Timing 2003: Rossi and Beyond", Cambridge, November

Scientific paper

We present an analysis of Cyg X-3 data from RXTE/PCA,HEXTE and ASM, supplemented by a selected spectrum from BeppoSAX. We fit the PCA/HEXTE spectra from 1996-2000 by a model including hybrid Comptonization, reflection and absorption, and classify them into hard, intermediate and soft states. Apart from the very strong absorption in Cyg X-3, the spectra resemble those of GRS 1915+105. The soft and intermediate state spectra require the presence of nonthermal Comptonizing electrons. We then study the radiative processes at soft X-rays with a hard-state spectrum from BeppoSAX modeled including emission from a photoionized plasma.

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