Abstract
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-August 1996 Cyg X-l was in high soft X-ray state and after August 9, 1996 it returned to its ordinary state but with some evidences of X-ray activity.
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References
Karitskaya, E.A., Goranskij, V.P. and Grankin, K.N. (1997) Properties of Optical Brightness Variations of Cyg X-1 in 1995-1996 Including X-ray Hard and Soft States, JENAM-97, Thessaloniki, Greece; (in preparation to Pisrna v Astron. Zh.)
Kemp, J. (1980) On the Allowed Size of an Accretion Disk in Cygnus X-l, Astro-physical Journal, 235 pp. 595–602
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© 1998 Springer Science+Business Media Dordrecht
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Bochkarev, N.G., Karitskaya, E.A., Lyuty, V.M. (1998). Optical Flares of Cygnus X-1. In: Koyama, K., Kitamoto, S., Itoh, M. (eds) The Hot Universe. International Astronomical Union / Union Astronomique Internationale, vol 188. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4970-9_135
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DOI: https://doi.org/10.1007/978-94-011-4970-9_135
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