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Article
Analysis of 3D Doppler Tomography of the X-ray Binary System Cygnus X-1 from Spectral Observations in 2007 in the HeII λ 4686 Å Line
This is the second paper in a series dedicated to studies of the X-ray binary Cyg X-1 in the HeII λ 4686 Å line using 3D Doppler tomography. A detailed analysis of the tomogram constructed has made it possible...
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Article
3D Doppler Tomography of the X-Ray Binary System Cygnus X-1 from Spectral Observations in 2007 in the HeII λ 4686 Å Line
The results of a 3D Doppler tomography analysis for the X-ray binary system Cyg X-1 in the HeII λ 4686 Å line are presented. Information about the motions of gaseous flows outside the orbital plane has been ob...
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Article
Analysis of optical spectra of V1357 Cyg≡Cyg X-1
Optical spectra and light curves of the massive X-ray binary V1357 Cyg are analyzed. The calculations were based on models of irradiated plane-parallel stellar atmospheres, taking into account reflection of th...
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Article
Spectroscopic monitoring of V1357 Cyg = Cyg X-1 in 2002–2004
We discuss the results of optical spectroscopic monitoring of Cyg X-1 = HDE 226868/V1357 Cyg in 2002–2004. Our spectroscopy was carried out at the Terskol Observatory (Kabarda-Balkaria, Russia; the resolving p...
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Article
Photometric and spectroscopic study of nova Cassiopeiae 1995 (V723 Cas)
We report an 11-year long series of U BV RI observations and the results of our monitoring of the classical slow nova V723 Cas. We analyze the spectra of this star taken using the 6-m telescope of the Special Ast...
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Article
Coordinated observations of Cyg X-1 (V1357 Cyg) from 1994–1998 in the commonwealth of independent states
We present observations of Cyg X-1 obtained during the coordinated international campaign “Optical Monitoring of Unique Astrophysical Objects,” carried out in observatories of CIS countries (Georgia, Kazakhsta...
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Article
Variability of Cyg X-1 (V1357 Cyg) in 1995–1996 during the hard and soft X-ray spectral states
We report photoelectric UBVR observations of Cyg X-1 with the 1-m Tien-Shan and 48-cm Mount Maidanak reflectors from October 1995 through November 1996. The orbital light curve is represented by the model of a ti...
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Chapter and Conference Paper
Optical Flares of Cygnus X-1
Photoelectric observations of Cyg X-l in 1996-97 fulfilled in Tien-Shan, Kazakhstan (WBVR), Mt. Maidanak, Uzbekistan (UBVR) and in Crimea, Ukraine (UBV) have detected unusual optical flare activity. During May...
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Article
Optical pre-nova identification for the X-ray Nova GRO J0422+32 (Nova Persei, 1992)
The X-ray Nova GRO J0422+32 in its low brightness has been identified with a B∼ 21 m , R∼20 m star on Palomar Sky Survey glass copies. The scan...
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Article
Polarization of intrinsic radiation of tidally distorted stars with electron-scattering atmospheres
Linear polarization of radiation emitted by tidally distorted stars as a function of the binary system phase is computed, taking into account true absorption and the scattering of light on free and bound elect...
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Article
Distribution of polarization and intensity of radiation across the stellar disk and numberical values of atmospheric characteristics governing this distribution
Computations of polarization and intensity of radiation from a unit stellar surface area are presented, as well as a study of the numerical characteristics of atmospheres — single-scattering albedo Ωλ and the ini...
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Article
Polarization of intrinsic radiation of tidally distorted stars with electron-scattering atmospheres
The variable linear polarization of the intrinsic radiation emitted by tidally distorted stars was computed with approximation of pure electron or Rayleigh scattering in the atmospheres. A precise form of the ...
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Chapter and Conference Paper
Parameters of the SS433 Accretion Disk from Photometry and Polarimetry
Photometric and polarimetric data for SS433 show the presence of a geometrically and optically thick slaved disk oriented normally to the jets. The observed matter is a hot, outflowing gas spreading mainly alo...