Search Publications
A Hard X-ray Survey of the Galactic-Center Region with the IBIS Telescope of the INTEGRAL Observatory: A Catalog of Sources
Gilfanov, M. R.; Sunyaev, R. A.; Cherepashchuk, A. M. +6 more
From August 23 through September 24, 2003, the INTEGRAL Observatory conducted a deep survey of the Galactic-Center region with a record-breaking sensitivity at energies above 20 keV. We have analyzed the images of the Galactic-Center region obtained with the ISGRI detector of the IBIS telescope (15-200 keV) and give a catalog of detected sources. …
A Hard X-ray Survey of the Sagittarius Arm Tangent with the IBIS Telescope of the INTEGRAL Observatory: A Catalog of Sources
Sunyaev, R. A.; Postnov, K. A.; Cherepashchuk, A. M. +3 more
We analyze the images of the Sagittarius Arm tangent obtained with the IBIS telescope of the INTEGRAL observatory in the energy range 18-120 keV during its observations in the spring of 2003. We detected 28 sources at a statistically significant level with fluxes above 1.4 mCrab in the energy range 18-60 keV. Of these sources, 16 were previously i…
Broadband X-ray Spectrum of XTE J1550-564 during the Outburst of 2003
Sunyaev, R. A.; Lutovinov, A. A.; Revnivtsev, M. G. +1 more
We present the INTEGRAL and RXTE X-ray observations of XTE J1550-564, a Galactic microquasar and a black hole candidate, during its outburst in the spring of 2003. The source during the outburst was in a canonical hard state, and its spectrum remained constant in both the rise and decay phases.
Broadband Observations of the Transient X-ray Pulsar SAX J2103.5+4545
Sunyaev, R. A.; Lutovinov, A. A.; Revnivtsev, M. G. +5 more
We investigated the optical, X-ray, and gamma-ray variability of the pulsar SAX J2103.5+4545. Our timing and spectral analyses of the X-ray and gamma-ray emissions from the source using RXTE and INTEGRAL data show that the shape of its spectrum in the energy range 3-100 keV is virtually independent of its intensity and the orbital phase. Based on …
Broadband X-ray Spectrum of the Intermediate Polar V2400 Oph
Sunyaev, R. A.; Lutovinov, A. A.; Revnivtsev, M. G. +2 more
We present the results of our analysis of the observations of the intermediate polar V2400 Oph by the INTEGRAL and RXTE observatories. We reconstructed the spectrum of the source over a wide (3-100 keV) energy range. The spectrum obtained can be fitted by a computed theoretical model of the post-shock emitting region with Tmax ~ 22 keV.…