Relativistic reflection features are commonly observed in the X-ray spectra of accreting black
holes. In the presence of high quality data and with the correct astrophysical model, X-ray …

Current models of the spectrum of X-rays reflected from accretion discs around black holes
and other compact objects are commonly calculated assuming that the density of the disc …

Aims. The only relativistic reflection model that implements a parameter relating the intensity
incident on an accretion disk to the observed intensity is relxill. The parameter used in …

We analyze simultaneously six composite RXTE spectra of GX 339–4 in the hard state
comprising 77 million counts collected over 196 ks. The source spectra are ordered by …

X-ray studies of stellar mass black holes in X-ray binaries and mass-accreting supermassive
black holes in Active Galactic Nuclei have achieved a high degree of maturity and have …

We obtained 16 VLT/X-shooter observations of GX 339− 4 in quiescence during the period
2016 May–September and detected absorption lines from the donor star in its NIR spectrum …

Characterizing the fast variability in black hole low-mass X-ray binaries (BHXBs) can help us
to understand the geometrical and physical nature of the innermost regions of these …

We investigate the relation between the optical extinction (AV) and the hydrogen column
density (NH) determined from X-ray observations of a large sample of Galactic sightlines …

We present a multi-epoch hard X-ray analysis of Cygnus X-1 in its soft state based on four
observations with the Nuclear Spectroscopic Telescope Array (NuSTAR). Despite the basic …

Context. We present a systematic X-ray spectral-timing study of the recently discovered,
exceptionally bright black hole X-ray binary system MAXI J1820+ 070. Our analysis focuses …