7th Microquasar Workshop 2008

Foça/Izmir, Turkey
2008 September 1st–5th

[MQW6, MQW5, MQW4, MQW3]

Multi-Satellite Observations of Cygnus X-1

Talk by Manfred Hanke

On 2008 April 18/19 we observed Cygnus X-1 in a multi-satellite campaign encompassing XMM-Newton, Chandra, Suzaku, RXTE, Swift, and INTEGRAL as well as simultaneous coverage in the radio during orbital phase 0. The measurement represents the best broad-band spectrum of Cyg X-1 ever achieved. In this contribution we present first results from the analysis of the observation, focusing on the soft X-ray spectrum and the interaction of the black hole with the strong stellar wind of its donor star through absorption line studies.


ADS Proceedings

Catching up on state transitions in Cygnus X-1

Moritz Böck, Jörn Wilms, Victoria Grinberg, Katja Pottschmidt, Manfred Hanke, Sera Markoff, Michael A. Nowak, Stefan Pirner, Guy Pooley

In 2005 February we observed Cygnus X-1 for a total of 10 days quasi-continuously with the Rossi X-ray Timing Explorerand the Ryle telescope. We present the results of the spectral and timing analysis on a timescale of 90 min and show that the behavior of Cyg X-1 is similar to that found during our years long monitoring campaign. As a highlight we present evidence for a full transition from the hard to the soft state that happened during less than three hours.

    poster   (7.1 MB),           print version (letter)   (7.1 MB)

ADS Proceedings

Suzaku Observations of Cyg X-1

Talk by Michael A. Nowak

ADS Proceedings