The broadband spectrum of Cygnus X-1
Astrophysics
2007-06-15 v1
Abstract
The Black Hole (BH) binary Cygnus X-1 has been observed simultaneously by INTEGRAL, RXTE, and XMM-Newton for four times in November and December 2004, when Cyg X-1 became first observable with XMM-Newton. During these observations the source was found in one of its transitional states between the hard state and the soft state. We obtained a high signal to noise spectrum of Cyg X-1 from 3 keV to 1 MeV which allows us to put constraints on the nature of the Comptonizing plasma by modeling the continuum with Comptonization models as eqpair (Coppi 1992). Using XMM-Newton we were also able to confirm the presence of a relativistically broadened Fe K-alpha line.
Keywords
Cite
@article{arxiv.0706.2137,
title = {The broadband spectrum of Cygnus X-1},
author = {S. Fritz and J. Wilms and K. Pottschmidt and M. A. Nowak and E. Kendziorra and M. G. Kirsch and I. Kreykenbohm and A. Santangelo},
journal= {arXiv preprint arXiv:0706.2137},
year = {2007}
}
Comments
4 pages, 3 figures