Simultaneous Chandra and RXTE observations of the nearby bright Seyfert 2 galaxy NGC4945 (2003)
Done, Chris, Madejski, Greg M., Zycki, Piotr T., Greenhill, Lincoln J.
We analyze recent simultaneous Chandra/RXTE observations of the Seyfert 2 galaxy NGC 4945. The unprecedented spatial resolution of Chandra means we are able to separate the spectra of the nucleus,...
The magnetic flare avalanches model of Poutanen & Fabian for X-ray variability of accreting black holes is combined with computations of vertical structure of illuminated accretion discs in...
I review observational data on X-ray energy spectra and variability of Seyfert 1 and Narrow Line Seyfert 1 galaxies, and compare them to black hole binary (BHB) systems. There seems to be greater...
Disk-corona interactions in soft spectral states of black hole binaries (2000)
Re-analysis of some archival X-ray data of black hole binaries in soft spectral states is presented. Results of detailed spectral fitting, including proper physical description of the X-ray...
On the effect of coronal outflow on spectra formation in galactic black hole systems (2000)
Janiuk, Agnieszka, Czerny, Bozena, Zycki, Piotr T.
We present the results of both analytical and numerical calculations of the amplitude of the reflection component in X-ray spectra of galactic black hole systems. We take into account the anisotropy...
Janiuk, Agnieszka, Zycki, Piotr T., Czerny, Bozena
We consider the role of advection in the two-temperature accreting corona with an underlying optically thick disc. The properties of coronal solutions depend significantly on the description of...
An unstable inner disk in Cyg X-1 ? (1998)
We present the first significant detection of relativistic smearing of the X-ray reflection spectrum from the putative accretion disk in the low/hard state of Cyg X--1. The ionization state, and...