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  1. No Access

    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...

    M. I. Agafonov, E. A. Karitskaya, O. I. Sharova, N. G. Bochkarev… in Astronomy Reports (2018)

  2. No Access

    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...

    M. I. Agafonov, E. A. Karitskaya, O. I. Sharova, N. G. Bochkarev… in Astronomy Reports (2018)

  3. No Access

    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...

    V. V. Shimanskii, E. A. Karitskaya, N. G. Bochkarev… in Astronomy Reports (2012)

  4. No Access

    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...

    E. A. Karitskaya, N. G. Bochkarev, A. V. Bondar’, G. A. Galazutdinov… in Astronomy Reports (2008)

  5. No Access

    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...

    E. A. Karitskaya, I. B. Voloshina, V. P. Goranskii, K. N. Grankin… in Astronomy Reports (2001)

  6. No Access

    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...

    E. A. Karitskaya, V. P. Goranskii, K. N. Grankin, S. Yu. Mel'nikov in Astronomy Letters (2000)

  7. No Access

    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...

    N. G. Bochkarev, E. A. Karitskaya, V. M. Lyuty in The Hot Universe (1998)

  8. No Access

    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...

    N. G. Bochkarev, E. A. Karitskaya in Astrophysics and Space Science (1985)

  9. No Access

    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...

    N. Bochkarev, E. A. Karitskaya, N. A. Sakhibullin in Astrophysics and Space Science (1985)

  10. No Access

    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 ...

    N. G. Bochkarev, E. A. Karitskaya, N. I. Shakura in Astrophysics and Space Science (1985)

  11. No Access

    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...

    N. G. Bochkarev, E. A. Karitskaya in Radio Stars (1985)