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

B.A. Harmon; C. Kouveliotou; D.J. Crary; D.M. Scott; F. van der Hooft; J. van Paradijs; M.H. Finger; M. van der Klis; W.H.G. Lewin; W.S. Paciesas

arxiv: astro-ph/9603112 · v1 · submitted 1996-03-20 · 🌌 astro-ph

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

D.J. Crary , C. Kouveliotou , J. van Paradijs , F. van der Hooft , D.M. Scott , W.S. Paciesas , M. van der Klis , M.H. Finger

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B.A. Harmon W.H.G. Lewin

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keywords hardx-raybatsecygnusrapidslopespectralaccretion

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

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