5 papers
GX 339-4: the distance, state transitions, hysteresis and spectral correlations
Andrzej A. Zdziarski, Marek Gierlinski, Joanna Mikolajewska +4
We study X-ray and variability and distance of GX 339-4. We derive d>7 kpc, based on recent determination of the binary parameters. We study data from the Ginga/ASM, the CGRO/BATSE…
GRS 1915+105: The brightest Galactic black hole
C. Done, G. Wardzinski, M. Gierlinski
We compare the evolution of spectral shape with luminosity in GRS 1915+105 with that of 'normal' black holes. The pathological time variability of GRS 1915+105 does not indicate th…
X-ray and gamma-ray spectra and variability of the black-hole candidate GX 339-4
Grzegorz Wardzinski, Andrzej A. Zdziarski, Marek Gierlinski +3
We analyse five observations of the X-ray binary GX 339-4 by the soft gamma-ray OSSE detector on board CGRO simultaneous with either Ginga or RXTE observations. The source was brig…
Effects of non-thermal tails in Maxwellian electron distributions on synchrotron and Compton processes
Grzegorz Wardzinski, Andrzej A. Zdziarski
We investigate how the presence of a non-thermal tail beyond a Maxwellian electron distribution affects the synchrotron process as well as Comptonization in plasmas with parameters…
Thermal synchrotron radiation and its Comptonization in compact X-ray sources
Grzegorz Wardzinski, Andrzej A. Zdziarski
We investigate thermal synchrotron radiation at semi-relativistic and relativistic temperatures. We find an analytic expression for the angle-averaged emission coefficient, and sho…