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A catalogue of unusually long thermonuclear bursts on neutron stars
Khaled Alizai, Jérôme Chenevez, Andrew Cumming +10
Rare, energetic (long) thermonuclear (Type I) X-ray bursts are classified either as intermediate-duration or superbursts, based on their duration. Intermediate-duration bursts last…
First wide field-of-view X-ray observations by a lobster eye focusing telescope in orbit
C. Zhang, Z. X. Ling, X. J. Sun +75
As a novel X-ray focusing technology, lobster eye micro-pore optics (MPO) feature both a wide observing field of view and true imaging capability, promising sky monitoring with sig…
The INTEGRAL view on Black Hole X-ray Binaries
S. E. Motta, J. Rodriguez, E. Jourdain +11
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-energy…
15 years of Galactic surveys and hard X-ray Background measurements
Roman A. Krivonos, Antony J. Bird, Eugene M. Churazov +15
The INTEGRAL hard X-ray surveys have proven to be of fundamental importance. INTEGRAL has mapped the Galactic plane with its large field of view and excellent sensitivity. Such har…
The X-ray bursts of XTE J1739-285: a NICER sample
Peter Bult, Diego Altamirano, Zaven Arzoumanian +10
In this work we report on observations with the Neutron Star Interior Composition Explorer of the known neutron star X-ray transient XTE J1739-285. We observed the source in 2020 F…
Multi-messenger astronomy with INTEGRAL
C. Ferrigno, V. Savchenko, A. Coleiro +19
At the time of defining the science objectives of the INTernational Gamma-Ray Astrophysics Laboratory (INTEGRAL), such a rapid and spectacular development of multi-messenger astron…
The Swift Bulge Survey: Motivation, Strategy, and First X-ray Results
A. Bahramian, C. O. Heinke, J. A. Kennea +12
Very faint X-ray transients (VFXTs) are X-ray transients with peak X-ray luminosities () of erg/s, which are not well-understood. We carried out a survey…
The Galactic LMXB Population and the Galactic Centre Region
S. Sazonov, A. Paizis, A. Bazzano +21
Seventeen years of hard X-ray observations with the instruments of the INTEGRAL observatory, with a focus on the Milky Way and in particular on the Galactic Centre region, have pro…
The Multi-INstrument Burst ARchive (MINBAR)
D. K. Galloway, J. J. M. in 't Zand, J. Chenevez +7
We present the largest sample of type-I (thermonuclear) X-ray bursts yet assembled, comprising 7083 bursts from 85 bursting sources. The sample is drawn from observations with Xeno…
Burst-induced coronal cooling in GS 1826-24 The clock wagging its tail
C. Sánchez-Fernández, J. J. E. Kajava, J. Poutanen +2
Type I X-ray bursts in GS 1826-24, and in several other systems, may induce cooling of the hot inner accretion flow that surrounds the bursting neutron star. Given that GS 1826-24…
The Swift Bulge Survey: optical and near-IR follow-up featuring a likely symbiotic X-ray binary & a focused wind CV
A. W. Shaw, C. O. Heinke, T. J. Maccarone +13
The nature of very faint X-ray transients (VFXTs) - transient X-ray sources that peak at luminosities - is poorly understood. The faint and of…
Data-Driven Modelling of the Van Allen Belts: The 5DRBM Model for Trapped Electrons
Lionel Métrailler, Guillaume Bélanger, Peter Kretschmar +10
The magnetosphere sustained by the rotation of the Earth's liquid iron core traps charged particles, mostly electrons and protons, into structures referred to as the Van Allen belt…
XMMU J181227.8-181234: a new ultracompact X-ray binary candidate
A. J. Goodwin, D. K. Galloway, J. J. M. in 't Zand +3
We report the discovery of Type I (thermonuclear) X-ray bursts from the transient source XMMU J181227.8-181234 = XTE J1812-182. We found 7 X-ray bursts in Rossi X-ray Timing Explor…
An embedded X-ray source shines through the aspherical AT2018cow: revealing the inner workings of the most luminous fast-evolving optical transients
Raffaella Margutti, B. D. Metzger, R. Chornock +41
We present the first extensive radio to gamma-ray observations of a fast-rising blue optical transient (FBOT), AT2018cow, over its first ~100 days. AT2018cow rose over a few days t…
The Influence of Stellar Spin on Ignition of Thermonuclear Runaways
Duncan K. Galloway, Jean J. M. in 't Zand, Jérôme Chenevez +7
Runaway thermonuclear burning of a layer of accumulated fuel on the surface of a compact star provides a brief but intense display of stellar nuclear processes. For neutron stars a…
The December 2015 re-brightening of V404 Cyg: Variable absorption from the accretion disc outflow
J. J. E. Kajava, S. E. Motta, C. Sánchez-Fernández +1
In December 2015 the black hole binary V404 Cyg underwent a secondary outburst after the main June 2015 event. We monitored this re-brightening with the INTEGRAL and Swift satellit…
INTEGRAL results on the electromagnetic counterparts of gravitational waves
S. Mereghetti, V. Savchenko, C. Ferrigno +18
Thanks to its high orbit and a set of complementary detectors providing continuous coverage of the whole sky, the INTEGRAL satellite has unique capabilities for the identification…
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…