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Astrophysics

arXiv:0706.2137 (astro-ph)
[Submitted on 14 Jun 2007]

Title:The broadband spectrum of Cygnus X-1

Authors:S. Fritz, J. Wilms, K. Pottschmidt, M. A. Nowak, E. Kendziorra, M. G. Kirsch, I. Kreykenbohm, A. Santangelo
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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.
Comments: 4 pages, 3 figures
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:0706.2137 [astro-ph]
  (or arXiv:0706.2137v1 [astro-ph] for this version)
  https://doi.org/10.48550/arXiv.0706.2137

Submission history

From: Sonja Fritz [view email]
[v1] Thu, 14 Jun 2007 14:48:10 UTC (75 KB)
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