Astronomy Letters

, Volume 27, Issue 8, pp 516–520 | Cite as

A photometric study of BQ Camelopardalis an optical counterpart of the X-ray source V0332+53

  • V. P. Goranskii


Eighteen-year-long photometric B, V, and R observations (1983–2000) have revealed variability of the light from BQ Cam with a \(0\mathop .\limits^m 6\) amplitude. During the first half of this time interval, we observed two brightening cycles with cycle duration of 1600 days. Such brightenings usually occur in Be stars and are attributable to shell episodes. The shorter X-ray outbursts in 1983 and 1989 coincide with the maxima of these cycles. During the second half of the observing interval, the object was faint; its brightness gradually increased, and no X-ray outbursts were observed. In quiescence, variability was detected on a time scale of several days with an amplitude no larger than \(0\mathop .\limits^m 15V\), which does not depend on orbital phase.

Key words

X-ray and gamma-ray sources pulsars, neutron stars, and black holes 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    R. W. Argyle, IAU Circ., No. 3897 (1983).Google Scholar
  2. 2.
    P. L. Bernacca, T. Iijima, and R. Stagni, IAU Circ., No. 3897 (1983).Google Scholar
  3. 3.
    P. L. Bernacca, T. Iijima, and R. Stagni, Astron. Astrophys. 132, L8 (1984).ADSGoogle Scholar
  4. 4.
    P. W. J. L. Brand, T. R. Geballe, and M. P. Toner, IAU Circ., No. 3893 (1983).Google Scholar
  5. 5.
    M. J. Coe, A. J. Longmore, B. J. Paygne, and C. G. Hanson, Mon. Not. R. Astron. Soc. 226, 455 (1987).ADSGoogle Scholar
  6. 6.
    R. H. D. Corbet, J. W. Woo, and F. Nagase, Astron. Astrophys. 276, 52 (1993).ADSGoogle Scholar
  7. 7.
    T. J. Deeming, Astrophys. Space Sci. 36, 137 (1975).CrossRefADSzbMATHMathSciNetGoogle Scholar
  8. 8.
    C. Heintz, H. Bradt, G. Clark, et al., IAU Circ., No. 2540 (1973).Google Scholar
  9. 9.
    M. Iye and K. Kodaira, Publ. Astron. Soc. Pac. 97, 1186 (1985).CrossRefADSGoogle Scholar
  10. 10.
    K. Kodaira, IAU Circ., No. 3897 (1983).Google Scholar
  11. 11.
    V. G. Kornilov and A. V. Krylov, Astron. Zh. 67, 173 (1990) [Sov. Astron. 34, 90 (1990)].ADSGoogle Scholar
  12. 12.
    J. Lafler and T. D. Kinman, Astrophys. J., Suppl. Ser. 11, 216 (1965).CrossRefADSGoogle Scholar
  13. 13.
    V. M. Lyuty and G. V. Zaitseva, Pis’ma Astron. Zh. 26, 13 (2000) [Astron. Lett. 26, 9 (2000)].Google Scholar
  14. 14.
    K. Makeshima, T. Ohashi, N. Kawai, et al., Publ. Astron. Soc. Jpn. 42, 295 (1990).ADSGoogle Scholar
  15. 15.
    J. Terrell and W.C. Predhorsky, Astrophys. J. Lett. 285, L15 (1985).ADSGoogle Scholar

Copyright information

© MAIK "Nauka/Interperiodica" 2001

Authors and Affiliations

  • V. P. Goranskii
    • 1
  1. 1.Sternberg Astronomical InstituteMoscowRussia

Personalised recommendations