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A photometric investigation of the optical variability of Markarian 501

  • B. Q. McGimsey
  • H. R. Miller
  • M. T. Carini
  • J. W. Wilson
III. Optical Variability Studies
Part of the Lecture Notes in Physics book series (LNP, volume 307)

Abstract

The optical variability of the BL Lacertae object, Markarian 501, has been monitored from 1976–1987. Long-term optical variations have been detected with an amplitude of 0.65 mag. The long-term small amplitude, color variations which have been observed are found to be weakly correlated with the long-term trends in brightness in the sense that the object appears bluer when it is brighter. No evidence has been found for variability on a time scale of days or less for this object.

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References

  1. Kondo,Y. et al., 1981, Ap.J., 243, 690.Google Scholar
  2. Landolt, A.U. 1973, A.J., 78, 959.Google Scholar
  3. Mufson, S.L. et al. 1984, Ap.J., 285, 571.Google Scholar
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  5. Ulrich, M.-H., Kinman, T.D., Lynds, C.R., Rieke, G.H., Ekers, R.D. 1975, Ap.J., 198, 261.Google Scholar

Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • B. Q. McGimsey
    • 1
  • H. R. Miller
    • 1
  • M. T. Carini
    • 1
  • J. W. Wilson
    • 1
  1. 1.Department of Physics and AstronomyGeorgia State UniversityAtlanta

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