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The Soft Gamma-Ray Spectral Variability of Cygnus X-1
M. L. McConnell, A. A. Zdziarski, K. Bennett +11
We have used observations of Cygnus X-1 from the Compton Gamma-Ray Observatory (CGRO) and BeppoSAX to study the variation in the MeV gamma-ray emission between the hard and soft sp…
Relativistic Kinetic Equation for Induced Compton Scattering of Polarized Radiation
Dmitrij I. Nagirner, Juri Poutanen
The relativistic kinetic equations describing time evolution and space dependence of the density matrices of polarized photons and electrons interacting via Compton scattering are…
Gamma-Ray Spectral Variability of Cygnus X-1
M. L. McConnell, K. Bennett, H. Bloemen +11
We have used observations from CGRO to study the variation in the MeV emission of Cygnus X-1 between its low and high X-ray states. These data provide a measurement of the spectral…
Impact of reverberation in flared accretion discs on temporal characteristics of X-ray binaries
Juri Poutanen
Observations suggest that accretion discs in many X-ray binaries are likely flared. An outer edge of the disc intercepts radiation from the central X-ray source. Part of that radia…
X-ray spectra of accretion discs with dynamic coronae
Julien Malzac, Andrei M. Beloborodov, Juri Poutanen
We compute the X-ray spectra produced by non-static coronae atop accretion discs around black holes and neutron stars. The hot corona is radiatively coupled to the underlying disc…
Understanding Spectral Variability and Time Lags in Accreting Black Holes
Juri Poutanen
I review the temporal/spectral data of accreting black hole sources paying most attention to the properties of the temporal variability such as photon energy dependent auto- and cr…