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…
An extension of the Planck galaxy cluster catalogue
Burenin, R. A.
We present a catalogue of galaxy clusters detected in the Planck all-sky Compton parameter maps and identified using data from the WISE and SDSS surveys. The catalogue comprises about 3000 clusters in the SDSS fields. We expect the completeness of this catalogue to be high for clusters with masses larger than M 500 ≈ 3 × 1014…
Kinematics of the galaxy from OB stars with proper motions from the Gaia DR1 catalogue
Bobylev, V. V.; Bajkova, A. T.
We consider two samples of OB stars with different distance scales that we have studied previously. The first and second samples consist of massive spectroscopic binaries with photometric distances and distances determined from interstellar calcium lines, respectively. The OB stars are located at heliocentric distances up to 7 kpc. We have identif…
Kinematics of the galaxy from Cepheids with proper motions from the Gaia DR1 catalogue
Bobylev, V. V.
A sample of classical Cepheids with known distances and line-of-sight velocities has been supplemented with proper motions from the Gaia DR1 catalogue. Based on the velocities of 260 stars, we have found the components of the peculiar solar velocity vector ( U, V, W)⊙ = (7.90, 11.73, 7.39) ± (0.65, 0.77, 0.62) km s-1 and the …
Systematic error of the Gaia DR1 TGAS parallaxes from data for the red giant clump
Gontcharov, G. A.
Based on the Gaia DR1 TGAS parallaxes and photometry from the Tycho-2, Gaia, 2MASS, andWISE catalogues, we have produced a sample of 100 000 clump red giants within 800 pc of the Sun. The systematic variations of the mode of their absolute magnitude as a function of the distance, magnitude, and other parameters have been analyzed. We show that the…
Searching for stars closely encountering with the solar system based on data from the Gaia DR1 and RAVE5 catalogues
Bobylev, V. V.; Bajkova, A. T.
We have searched for the stars that either encountered in the past or will encounter in the future with the Solar system closer than 2 pc. For this purpose, we took more than 216 000 stars with the measured proper motions and trigonometric parallaxes from the Gaia DR1 catalogue and their radial velocities from the RAVE5 catalogue. We have found se…
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…
Optical spectroscopy of candidates for quasars at 3 < z < 5.5 from the XMM-newton X-ray survey. A distant X-ray quasar at z = 5.08
Sazonov, S. Yu.; Eselevich, M. V.; Khorunzhev, G. A. +2 more
We present the results of optical spectroscopy for 19 quasar candidates at photometric redshifts z phot ≳ 3, 18 of which enter into the Khorunzhev et al. (2016) catalog (K16). This is a catalog of quasar candidates and known type 1 quasars selected among the X-ray sources of the 3XMM-DR4 catalog of the XMM-Newton serendipitous survey. W…
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…