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Positron annihilation spectrum from the Galactic Center region observed by SPI/INTEGRAL
E. Churazov, R. Sunyaev, S. Sazonov +2
The electron-positron annihilation spectrum observed by SPI/INTEGRAL during deep Galactic Center region exposure is reported. The line energy (510.9540.075 keV) is consistent…
Radiative feedback from quasars and the growth of massive black holes in stellar spheroids
S. Yu. Sazonov, J. P. Ostriker, L. Ciotti +1
We discuss the importance of feedback via photoionization and Compton heating on the co-evolution of massive black holes (MBHs) at the center of spheroidal galaxies and their stell…
Radiative Feedback from Quasars and the Growth of Supermassive Black Holes
S. Yu. Sazonov, J. P. Ostriker, L. Ciotti +1
We discuss the role of feedback via photoionization and Compton heating in the co-evolution of massive black holes at the center of spheroidal galaxies and their stellar and gaseou…
Broadband Observations of the Transient X-ray Pulsar SAX J2103.5+4545
E. V. Filippova, A. A. Lutovinov, P. E. Shtykovsky +5
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…
INTEGRAL detection of a long powerful burst from SLX1735-269
S. Molkov, M. Revnivtsev, A. Lutovinov +1
We present results of analysis of a bursting behavior of a low mass X-ray binary system SLX 1735-269 during INTEGRAL observations of the Galactic Center region in 2003. There were…
Hard X-ray view of the past activity of Sgr A* in a natural Compton mirror
M. G. Revnivtsev, E. M. Churazov, S. Yu. Sazonov +6
We report the association of the recently discovered hard X-ray source IGR J17475-2822 with the giant molecular cloud Sgr B2 in the Galactic Center region. The broad band (3-200 ke…
Scattering in the vicinity of relativistic jets: a method for constraining jet parameters
Conrad Cramphorn, Sergey Sazonov, Rashid Sunyaev
Relativistic jets of radio loud active galactic nuclei (AGN) produce highly directed, intense beams of radiation. A fraction of this beamed radiation scatters on the thermal plasma…
Coordinated INTEGRAL and optical observations of SS433
A. M. Cherepashchuk, R. A. Sunyaev, S. N. Fabrika +14
Results of simultaneous {\it INTEGRAL} and optical observations of galactic microquasar SS433 in May 2003 are presented. The analysis of the X-ray and optical eclipse duration and…
Broadband X-ray spectrum of XTE J1550-564 during 2003 outburst
V. A. Arefiev, M. G. Revnivtsev, A. A. Lutovinov +1
Results of broadband INTEGRAL and RXTE observations of the Galactic microquasar XTE J1550-564 during outburst in spring 2003 are presented. During the outburst the source was found…
Superposition of blackbodies and the dipole anisotropy: A possibility to calibrate CMB experiments
J. Chluba, R. A. Sunyaev
The CMB angular temperature fluctuations observed by COBE and WMAP enable us to place a lower limit on the spectral distortions of the CMB at any angular scale. These distortions a…
Broadband X-ray spectrum of intermediate polar V1223 Sgr
M. Revnivtsev, A. Lutovinov, V. Suleimanov +2
We present the broadband phase averaged spectrum of one of the brightest intermediate polars V1223 Sgr, obtained with INTEGRAL and RXTE observatories (3-100 keV). Good statistical…
Hard X-ray sky survey with the SIGMA telescope aboard GRANAT observatory
M. G. Revnivtsev, R. A. Sunyaev, M. R. Gilfanov +5
During the lifetime of GRANAT orbital observatory the SIGMA telescope collected X-ray images of more than 1/4 of the whole sky. Among these regions the Galactic Center had largest…