Abstract
The long-term light curves of the AM Her type binary BY Cam and the nova-like variable PG 2133+115 are presented. The BVR observations were carried out at a 0.5 m telescope equipped with a high sensitive TV tube superisocon (Abramenko et al. 1978), the UBV photoelectric data were obtained at 0.6 and 1.25 m telescopes and the photographic estimates were made from the negatives obtained at the 0.4m astrograph in Crimea.
Both stars show high and low brightness states. They show similar behaviour in some respects: the ampliture between high ang low states was about two magnitudes in B, but the duration of low states was approximately two months for BY Cam and 1⋯2 years for PG2133+115.
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References
Abramenko, A.M., Prokofeva, V.V., Bondar, N.I.1988, Bull, of the Crimean Astroph. Obs., 78, 189
Green, R.F., Ferguson, D., Liebert J., 1982, PASP, 94, 560
Misselt, K.A., Shafter, A.W., 1995, AJ, 109, 1757
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© 1996 Kluwer Academic Publishers
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Sokolov, D.A., Shugarov, S.Y., Pavlenko, E.P. (1996). Long-Term Brightness Changes of Two CVS. In: Evans, A., Wood, J.H. (eds) Cataclysmic Variables and Related Objects. Astrophysics and Space Science Library, vol 208. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0325-8_65
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DOI: https://doi.org/10.1007/978-94-009-0325-8_65
Publisher Name: Springer, Dordrecht
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