101 citations · 729 across the 25 of their papers we have counts for
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X-ray Observations of Optically Selected Giant Elliptical-Dominated Galaxy Groups
Alexey Voevodkin, Christopher J. Miller, Konstantin Borozdin +4
We present a combined optical and X-ray analysis of three optically selected X-ray bright groups with giant elliptical galaxies in the center. These massive ellipticals were target…
RX J0042.3+4115: a stellar mass black hole binary identified in M31
R. Barnard, J. P. Osborne, U. Kolb +1
Four XMM-Newton X-ray observations of the central region of the Andromeda Galaxy (M31) have revealed an X-ray source that varies in luminosity over \~1--3, 10^{38} erg s^{-1} betwe…
Fast X-ray Transients and Their Connection to Gamma-Ray Bursts
Vadim A. Arefiev, William C. Priedhorsky, Konstantin N. Borozdin
Fast X-ray transients (FXTs) with timescales from seconds to hours have been seen by numerous space instruments. We have assembled archival data from Ariel-5, HEAO-1 (A-1 and A-2),…
SkyDOT (Sky Database for Objects in the Time Domain): A Virtual Observatory for Variability Studies at LANL
P. Wozniak, K. Borozdin, M. Galassi +5
The mining of Virtual Observatories (VOs) is becoming a powerful new method for discovery in astronomy. Here we report on the development of SkyDOT (Sky Database for Objects in the…
Real-Time Detection of Optical Transients with RAPTOR
Konstantin Borozdin, Steven Brumby, Mark Galassi +6
Fast variability of optical objects is an interesting though poorly explored subject in modern astronomy. Real-time data processing and identification of transient celestial events…
A Distributed Control System for Rapid Astronomical Transient Detection
J. Wren, K. Borozdin, S. Brumby +7
The Rapid Telescope for Optical Response (RAPTOR) program consists of a network of robotic telescopes dedicated to the search for fast optical transients. The pilot project is comp…
The discovery of 2.78 hour periodic modulation of the X-ray flux from globular cluster source Bo 158 in M31
S. Trudolyubov, K. Borozdin, W. Priedhorsky +4
We report the discovery of periodic intensity dips in the X-ray source XMMU J004314.1+410724, in the globular cluster Bo158 in M31. The X-ray flux was modulated by ~83% at a period…
The RAPTOR Experiment: A System for Monitoring the Optical Sky in Real Time
W. T. Vestrand, K. Borozdin, S. Brumby +10
The Rapid Telescopes for Optical Response (RAPTOR) experiment is a spatially distributed system of autonomous robotic telescopes that is designed to monitor the sky for optical tra…
Observations of the X-ray Afterglows of GRB011211 and GRB001025 by XMM-Newton
Konstantin N. Borozdin, Sergey P. Trudolyubov
We present the XMM-Newton observations of X-ray afterglows of the gamma-ray bursts GRB 011211 and GRB 001025. For GRB 011211 XMM detected fading X-ray object with an average flux i…
On the X-ray source luminosity distributions in the bulge and disk of M31: First results from XMM-Newton survey
Sergey Trudolyubov, Konstantin Borozdin, William Priedhorsky +2
We present luminosity distributions for the X-ray sources detected with XMM-Newton in the bulge and disk of the Andromeda Galaxy (M31). The disk is clearly lacking the brighter sou…
The central region of M31 observed with XMM-Newton. II. Variability of the individual sources
J. P. Osborne, K. N. Borozdin, S. P. Trudolyubov +13
We present the results of a study of the variability of X-ray sources in the central 30' of the nearby Andromeda Galaxy (M31) based on XMM Performance Verification observations. Tw…
The central region of M31 observed with XMM-Newton (I. Group properties and diffuse emission)
R. Shirey, R. Soria, K. Borozdin +13
We present the results of a study based on an XMM-Newton Performance Verification observation of the central 30 arcmin of the nearby spiral galaxy M31. In the 34-ks European Photon…
XMM-Newton observations of NGC 253: Resolving the emission components in the disk and nuclear area
W. Pietsch, T. P. Roberts, M. J. Freyberg +11
The high XMM-Newton throughput allows a detailed investigation of the spatial, spectral and variability properties of the extended and point source emission of the starburst galaxy…
On the Integrated Spectrum of the X-ray Binaries and the Origin of Soft X-ray Emission from the Bulge of M31
Konstantin N. Borozdin, William C. Priedhorsky
Using ROSAT PSPC data, we have performed several tests aimed at understanding the origin of the soft X-ray spectral component detected from the bulge of M31. We find that a signifi…
Discovery of 0.08 Hz QPO in the power spectrum of black hole candidate XTE J1118+480
M. Revnivtsev, R. Sunyaev, K. Borozdin
We found a strong QPO feature at 0.085+/-0.002 Hz in the power spectrum of X-ray transient XTE J1118+480. The QPO was detected in PCA/RXTE data with an amplitude close to 10% rms,…
RXTE observations of 4U 1630-47 during the peak of its 1998 outburst
Sergey P. Trudolyubov, Konstantin N. Borozdin, William C. Priedhorsky
We present an analysis of the RXTE observations of 4U 1630-47 during its outburst of 1998. The light curve and the spectral evolution of the outburst were distinctly different from…
RXTE Observations of an Outburst of Recurrent X-ray Nova GS 1354-644
Mikhail G. Revnivtsev, Konstantin N. Borozdin, William C. Priedhorsky +1
We present the results of Rossi X-ray Timing Explorer observations of GS 1354-644 during a modest outburst in 1997-1998. The source is one of a handful of black hole X-ray transien…
The X-ray Nova GRS 1739-278 near the Galactic Center
K. N. Borozdin, M. G. Revnivtsev, S. P. Trudolyubov +3
The soft X-ray nova GRS 1739-278 flared up in 1996 near the Galactic center. We present the observations of this interesting source, a black-hole candidate, with the instruments on…
Do the Spectra of Soft X-ray Transients Reveal Bulk Motion Inflow Phenomenon?
Konstantin Borozdin, Mikhail Revnivtsev, Sergey Trudolyubov +2
We present our analysis of the high-energy radiation from black hole (BH) transients, using archival data obtained primarily with RXTE observatory, and a comprehensive test of the…
X-ray Spectrum of the Black Hole Candidate X1755-338
H. C. Pan, G. K. Skinner, R. A. Sunyaev +1
We report the first detection of a hard power-law tail in the X-ray spectrum of the black hole candidate (BHC) binary X1755-338, which was observed in 1989 March-September during t…