207 citations · 1.7k across the 32 of their papers we have counts for
35 papers
X-ray polarization in the soft state of Cyg X-1
A. Niedzwiecki, M. Szanecki, A. Veledina +5
We aim to identify the physical mechanism responsible for the observed X-ray emission and polarization of Cyg X-1 in the soft state. We performed a detailed spectral analysis of X-…
What Is the Black Hole Spin in Cyg X-1?
Andrzej A. Zdziarski, Swadesh Chand, Srimanta Banerjee +6
We perform a detailed study of the black hole spin of Cyg X-1, using accurate broad-band X-ray data obtained in the soft spectral state by simultaneous NICER and NuSTAR observation…
Hybrid Comptonization and Electron-Positron Pair Production in the Black-Hole X-Ray Binary MAXI J1820+070
Andrzej A. Zdziarski, Elisabeth Jourdain, Piotr Lubinski +6
We study X-ray and soft gamma-ray spectra from the hard state of the accreting black-hole binary MAXI J1820+070. We perform analysis of two joint spectra from NuSTAR and INTEGRAL,…
Geometry of the X-ray source 1H 0707-495
Michal Szanecki, Andrzej Niedzwiecki, Chris Done +3
We investigate constraints for the size and location of the X-ray source in 1H 0707-495 determined from the shape of the relativistically smeared reflection from the accretion disc…
A comprehensive analysis of the hard X-ray spectra of bright Seyfert galaxies
P. Lubinski, V. Beckmann, L. Gibaud +7
Hard X-ray spectra of 28 bright Seyfert galaxies observed with INTEGRAL were analyzed together with the X-ray spectra from XMM-Newton, Suzaku and RXTE. These broad-band data were f…
Long-term variability of AGN at hard X-rays
S. Soldi, V. Beckmann, W. H. Baumgartner +6
Variability at all observed wavelengths is a distinctive property of AGN. Hard X-rays provide us with a view of the innermost regions of AGN, mostly unbiased by absorption along th…