Abstract
The EXOSAT Medium Energy instrument has been used with the new HER6 mode to study the rapid variability of Cygnus X-1. It was found that the fluctuations in the higher energy band (5–14 keV) lagged behind those in the lower band (2–5 keV) by about 6 milliseconds. This confirms predictions of the inverse Compton model and gives an upper limit to the scale-size of the hot gas clouds.
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References
Guilbert, P.W. and Fabian, A.C. (1982) Nature 296, 226.
Liang, E.P. and Nolan, P.L. (1984) Space Sci. Rev. 38, 353.
Nolan, P.L. et al (1981) Astrophys. J. 246, 494.
Page, C.G. et al (1982) Space Sci. Rev. 30, 369.
Priedhorsky, W. et al (1979) Astrophys.J. 233, 350.
Shapiro, S.L. et al (1976) Astrophys.J. 204, 187.
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Page, C.G. Study of rapid variability in Cygnus X-1. Space Sci Rev 40, 387–390 (1985). https://doi.org/10.1007/BF00179846
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DOI: https://doi.org/10.1007/BF00179846