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 …

Black holes are among the most extreme objects that can be found in the Universe and an
ideal laboratory for testing fundamental physics. Here, the basic properties of black holes as …

We present a high density disc reflection spectral analysis of a sample of 17 Seyfert 1
galaxies to study the inner disc densities at different black hole mass scales and accretion …

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 …

We present a broad-band spectral analysis of the black hole binary GX 339-4 with NuSTAR
and Swift using high-density reflection model. The observations were taken when the source …

Einstein's theory of General Relativity predicts that the spacetime metric around
astrophysical black holes is described by the Kerr solution. In this work, we employ state-of …

We present first results from a series of NuSTAR observations of the black hole X-ray binary
V404 Cyg obtained during its summer 2015 outburst, primarily focusing on observations …

We analyze simultaneous observations with NuSTAR and Swift of the black hole binary GX
339–4 in which we clearly detect both a strong thermal component and prominent relativistic …

The black hole X-ray binary H1743− 322 lies in a region of the Galaxy with high extinction,
and therefore it has not been possible to make a dynamical mass measurement. In this …