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XMM-Newton discovery of a sharp spectral feature at ~7 keV in the Narrow-Line Seyfert 1 galaxy 1H 0707-495
Th. Boller, A. C. Fabian, R. Sunyaev +6
We report the first detection of a sharp spectral feature in a Narrow-Line Seyfert 1 galaxy. Using XMM-Newton we have observed 1H0707-495 and find a drop in flux by a factor of mor…
V4641Sgr - Super-Eddington source enshrouded by an extended envelope
M. Revnivtsev, R. Sunyaev, M. Gilfanov +1
An optical spectroscopy of an unusual fast transient V4641 Sgr constrains its mass to 8.7-11.7M_sun (9.6M_sun is the best fit value) and the distance to 7.4--12.3 kpc (Orosz et al.…
An upper limit on the X-ray luminosity of the black hole - microlens OGLE-1999-BUL-32
M. Revnivtsev, R. Sunyaev
We present an upper limit on the 3--20 keV X-ray flux from the black hole - microlens OGLE-1999-BUL-32, based on RXTE/PCA scans over the Galactic Center region in 1999-2000. It is…
The Milky Way in X-rays for an outside observer: Log(N)-Log(S) and Luminosity Function of X-ray binaries from RXTE/ASM data
H. -J. Grimm, M. Gilfanov, R. Sunyaev
We study the Log(N)-Log(S) and X-ray luminosity function in the 2-10 keV energy band, and the spatial (3-D) distribution of bright, log(L_X) > 34-35 erg/s, X-ray binaries in the Mi…
Possible 38 day X-ray period of KS1731-260
M. Revnivtsev, R. Sunyaev
We report the detection of a 38 day period in the X-ray flux of the transient burster KS1731-260. The narrow peak of periodicity was detected during ~TJD 10150--11050 when the sour…
The X-ray Source SLX 1732-304 in the Globular Cluster Terzan 1: The Spectral States and an X-ray Burst
M. N. Pavlinsky, S. A. Grebenev, A. A. Lutovinov +2
The results of ART-P/Granat observations of the X-ray burster SLX1732-304 in the globular cluster Terzan 1 are presented. The X-ray (3-20 keV) fluxes from the source differed by mo…