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Accretion disks and coronae in the X-ray flashlight
N. Degenaar, D. R. Ballantyne, T. Belloni +10
Plasma accreted onto the surface of a neutron star can ignite due to unstable thermonuclear burning and produce a bright flash of X-ray emission called a Type-I X-ray burst. Such e…
An elevation of 0.1 light-seconds for the optical jet base in an accreting Galactic black hole system
Poshak Gandhi, Matteo Bachetti, Vik S. Dhillon +25
Relativistic plasma jets are observed in many accreting black holes. According to theory, coiled magnetic fields close to the black hole accelerate and collimate the plasma, leadin…
INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational Wave Event GW170817
V. Savchenko, C. Ferrigno, E. Kuulkers +20
We report the e INTernational Gamma-ray Astrophysics Laboratory (INTEGRAL) detection of the short gamma-ray burst GRB 170817A (discovered by Fermi-GBM) with a signal-to-noise ratio…
Neutron star cooling and the rp process in thermonuclear X-ray bursts
J. J. M. in 't Zand, M. E. B. Visser, D. K. Galloway +5
When the upper layer of an accreting neutron star experiences a thermonuclear runaway of helium and hydrogen, it exhibits an X-ray burst of a few keV with a cool-down phase of typi…
INTEGRAL observations of GW170104
V. Savchenko, C. Ferrigno, E. Bozzo +16
We used data from the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) to set upper-limits on the -ray and hard X-ray prompt emission associated with the gravitational…
Swift observations of V404 Cyg during the 2015 outburst: X-ray outflows from super-Eddington accretion
S. E. Motta, J. J. E. Kajava, C. Sánchez-Fernández +11
The black-hole binary V404 Cyg entered the outburst phase in June 2015 after 26 years of X-ray quiescence, and with its behaviour broke the outburst evolution pattern typical of mo…
Flux decay during thermonuclear X-ray bursts analysed with the dynamic power-law index method
J. Kuuttila, J. J. E. Kajava, J. Nättilä +5
The cooling of type-I X-ray bursts can be used to probe the nuclear burning conditions in neutron star envelopes. The flux decay of the bursts has been traditionally modelled with…