Correlation Between BATSE Hard X-ray Spectral and Timing Properties of Cygnus X-1

Details Correlation Between BATSE Hard X-ray Spectral and Timing Properties of Cygnus X-1 Correlation Between BATSE Hard X-ray Spectral and Timing Properties of Cygnus X-1

1996-03-20

arxiv.org/abs/astro-ph/9603112v1

Astronomy and Astrophysics

Astrophysics

17 pages, 3 Postscript figures, uses aasms4.sty. Accepted for publication in Astrophysical Journal Letters

Scientific paper

10.1086/310039

We have analyzed approximately 1100 days of Cygnus X-1 hard X-ray data obtained with BATSE to study its rapid variability. We find for the first time correlations between the slope of the spectrum and the hard X-ray intensity, and between the spectral slope and the amplitude of the rapid variations of the hard X-ray flux. We compare our results with expectations from current theories of accretion onto black holes.

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