Catching Up on State Transitions in Cygnus X-1
Abstract
In 2005 February we observed Cygnus X-1 over a period of 10 days quasi-continuously with the Rossi X-ray Timing Explorer and 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. The observation provided a more complete picture of a state transition than before, especially concerning the evolution of the time lags, due to unique transition coverage and analysis with high time resolution.
Keywords
Cite
@article{arxiv.0811.2357,
title = {Catching Up on State Transitions in Cygnus X-1},
author = {Moritz Boeck and Manfred Hanke and Joern Wilms and Victoria Grinberg and Katja Pottschmidt and Sera Markoff and Michael A. Nowak and Stefan Pirner and Guy Pooley},
journal= {arXiv preprint arXiv:0811.2357},
year = {2009}
}
Comments
5 pages, contributed poster at the 7th Microquasar Workshop, Foca, Turkey, Sept. 1-5, 2008