69 citations · 316 across the 15 of their papers we have counts for
15 papers
Unprecedentedly bright X-ray flaring in Cygnus X-1 observed by INTEGRAL
P. Thalhammer, T. Bouchet, J. Rodriguez +15
We study three extraordinarily bright X-ray flares originating from Cyg X-1 seen on 2023 July 10 detected with INTEGRAL. The flares had a duration on the order of only ten minutes…
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…
Rapid spectral transition of the black hole binary V404 Cyg
J. J. E. Kajava, C. Sánchez-Fernández, J. Alfonso-Garzón +2
During the June 2015 outburst of the black hole binary V404 Cyg, rapid changes in the X-ray brightness and spectra were common. The INTEGRAL monitoring campaign detected spectacula…
Optical/X-ray correlations during the V404 Cyg June 2015 outburst
J. Alfonso-Garzón, C. Sánchez-Fernández, P. A. Charles +6
We present a multiwavelength analysis of the simultaneous optical and X-ray light curves of the microquasar V404 Cyg during the June 2015 outburst. We have performed a comprehensiv…
A faint outburst of the accreting millisecond X-ray pulsar SAX J1748.9-2021 in NGC 6440
F. Pintore, A. Sanna, A. Riggio +6
SAX J1748.9-2021 is an accreting X-ray millisecond pulsar observed in outburst five times since its discovery in 1998. In early October 2017, the source started its sixth outburst,…
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…
Long-term optical and X-ray variability of the Be/X-ray binary H 1145-619: discovery of an on-going retrograde density wave
J. Alfonso-Garzón, J. Fabregat, P. Reig +7
Multiwavelength monitoring of Be/X-ray binaries is crucial to understand the mechanisms producing their outbursts. H 1145-619 is one of these systems, which has recently displayed…
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…
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…
X-ray burst induced spectral variability in 4U 1728-34
J. J. E. Kajava, C. Sánchez-Fernández, E. Kuulkers +1
Aims. INTEGRAL has been monitoring the Galactic center region for more than a decade. Over this time INTEGRAL has detected hundreds of type-I X-ray bursts from the neutron star low…
Detection of Very Low-Frequency Quasi-Periodic Oscillations in the 2015 Outburst of V404 Cygni
D. Huppenkothen, G. Younes, A. Ingram +12
In June 2015, the black hole X-ray binary (BHXRB) V404 Cygni went into outburst for the first time since 1989. Here, we present a comprehensive search for quasi-periodic oscillatio…
The black hole binary V404 Cygni: an obscured AGN analogue
S. E. Motta, J. J. E. Kajava, C. Sánchez-Fernández +2
Typical black hole binaries in outburst show spectral states and transitions, characterized by a clear connection between the inflow onto the black hole and outflow from its vicini…
New insights into the quasi-periodic X-ray burster GS 0836-429
E. Aranzana, C. Sánchez-Fernández, E. Kuulkers
GS 0836-429 is a neutron star X-ray transient that displays Type-I X-ray bursts. In 2003 and 2004 it experienced two outbursts in X-rays. We present here an analysis of the system…
Automatic classification of eclipsing binaries light curves using neural networks
L. M. Sarro, C. Sánchez-Fernández, A. Giménez
In this work we present a system for the automatic classification of the light curves of eclipsing binaries. This system is based on a classification scheme that aims to separate e…