Search Publications

Precursors of short gamma-ray bursts in the SPI-ACS/INTEGRAL experiment.

Minaev, P. Yu.; Pozanenko, A. S.

We have analyzed the light curves of 519 short gamma-ray bursts (GRBs) detected in the SPI-ACS/INTEGRAL experiment from December 2002 to May 2014 to search for precursors (a possible activity of the GRB source before the beginning of the main episode). Both the light curves of 519 individual events and the averaged light curve of 372 brightest bur…

Type I X-ray Bursts Detected by the JEM-X Telescope Onboard the INTEGRAL Observatory in 2003-2015

Grebenev, S. A.; Mereminskiy, I. A.; Chelovekov, I. V. +1 more

We present the results of our analysis of the JEM-X/INTEGRAL data obtained from January 2003 to January 2015 aimed at searching for type I X-ray bursts from known and new bursters. Such bursts are caused by thermonuclear explosions on the surface of a neutron star. We have searched for bursts in the records of the count rate of the JEM-X detectors…

IGR J17445-2747—Yet another X-ray burster in the galactic bulge

Sunyaev, R. A.; Grebenev, S. A.; Mereminskiy, I. A.

The discovery of a type I X-ray burst from the faint unidentified transient source IGR J17445-2747 in the Galactic bulge by the JEM-X telescope onboard the INTEGRAL observatory is reported. Type I bursts are believed to be associated with thermonuclear explosions of accreted matter on the surface of a neutron star with a weak magnetic field in a l…

Multiple X-ray bursts and the model of a spreading layer of accreting matter over the neutron star surface

Grebenev, S. A.; Chelovekov, I. V.

We report the detection of series of close type I X-ray bursts consisting of two or three events with a recurrence time much shorter than the characteristic (at the observed mean accretion rate) time of matter accumulation needed for a thermonuclear explosion to be initiated on the neutron star surface during the JEM-X/INTEGRAL observations of sev…

The outburst of the X-ray nova GRS 1739-278 in September 2016

Sunyaev, R. A.; Grebenev, S. A.; Burenin, R. A. +3 more

During the scanning observations of the Galactic center region in late August-September 2016 we detected a new (third) outburst of the historical X-ray nova GRS 1739-278, a presumed black hole in a low-mass X-ray binary. This was reported in the Astronomer's Telegrams (Mereminskiy et al. 2016). In this paper we present the results of INTEGRAL and …