Massive stars, at least∼ 10 \sim10 times more massive than the Sun, have two key
properties that make them the main drivers of evolution of star clusters, galaxies, and the …

INTEGRAL is an ESA mission in fundamental astrophysics that was launched in October
2002. It has been in orbit for over 18 years, during which it has been observing the high …

We report new radio observations of a sample of 36 neutron star (NS) X-ray binaries, more
than doubling the sample in the literature observed at current-day sensitivities. These …

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 …

Aims. We probe the high-energy (> 60 MeV) emission from the black hole X-ray binary
system, Cygnus X-1, and investigate its origin. Methods. We analyzed 7.5 yr of data by Fermi …

Cygnus X–1 is the first Galactic source confirmed to host an accreting black hole. It has been
detected across the entire electromagnetic spectrum from radio to GeV gamma-rays. The …

Context. Clumping in the radiation-driven winds of hot, massive stars severly affects the
derivation of synthetic observables across the electromagnetic spectrum. Aims. We …

The geometry of the accretion flow in black hole X-ray binaries in the hard state, in particular
the position of the disc inner edge, has been a subject of intense debate in recent years. We …

The Neutron Star Interior Composition Explorer (NICER) monitoring campaign of Cyg X-1
allows us to study its spectral-timing behavior at energies< 1 keV across all states. The hard …

ABSTRACT Polarization of the $\gtrsim 400$ keV hard tail of the microquasar Cygnus X-1
has been independently reported by INTEGRAL/Imager on Board the INTEGRAL Satellite …