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Energy Release on the Surface of a Rapidly Rotating Neutron Star during Disk Accretion: A Thermodynamic Approach
N. Sibgatullin, R. Sunyaev
The total energy E of a star as a function of its angular momentum J and mass M in the Newtonian theory: E = E(J, M) [in general relativity, the gravitational mass M of a star as a…
Energy Release During Disk Accretion onto a Rapidly Rotating Neutron Star
N. R. Sibgatullin, R. A. Sunyaev
The energy release L_s on the surface of a neutron star (NS) with a weak magnetic field and the energy release L_d in the surrounding accretion disk depend on two independent param…
New class of low frequency QPOs: signature of nuclear burning or accretion disk instabilities?
M. Revnivtsev, E. Churazov, M. Gilfanov +1
We report the discovery of a new class of low frequency quasi--periodic variations of the X-ray flux in the X-ray bursters 4U1608-52 and 4U1636-536. We also report an occasional de…
X-Ray Bursters A1742-294 and SLX1744-299/300 Near the Galactic Center
A. A. Lutovinov, S. A. Grebenev, M. N. Pavlinsky +1
We present a study of two X-ray bursters in the Galactic Center field with the ART-P telescope onboard GRANAT. During 1990-1992 approximately 100 X-ray bursts were detected from th…
Observations of the Soft Gamma-Ray early Afterglow emission from Two Bright Gamma-ray Bursts
A. Tkachenko, O. Terekhov, R. Sunyaev +4
We present the results of observations of the soft gamma-ray early afterglows with the energy above 100keV from two bright Gamma-ray bursts detected by the PHEBUS instrument of the…
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,…