Integral observation of Cyg X-1 in an intermediate state

2004/11/02 by J. Malzac, Malzac, J., P. O. Petrucci +28
Engineering · Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Particle Accelerators and Free-Electron Lasers #Particle accelerators and beam dynamics #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0411069

4 pages, 8 figures, to appear in the proceedings of the 5th INTEGRAL workshop "The INTEGRAL Universe", (Munich, February 2004), ESA Special Publication SP-552

arxiv created 2004/11/02 · arxiv updated 2009/12/01

Abstract

We present preliminary results of an observation of Cygnus X-1 with INTEGRAL performed on June 7-11 2003. Both spectral and variability properties of the source indicate that Cygnus X-1 was in an intermediate state. As expected during state transitions, we find an anticorrelation between the 3-10 keV and the 15 GHz radio fluxes and a strong correlation between the 3-200 keV hardness and radio flux.

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