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Symbiotic Nova V1016 Cyg as Interacting Binary
Chochol, D.; Pribulla, T.; Parimucha, S.
Long-term UBV photoelectric and photographic photometry of the symbiotic nova V1016 Cyg is discussed. The pre-outburst brightening in 1949, main nova-like outburst in 1964 and two small brightenings in 1980 and 1994 suggest 15.1±0.2 years period of activity. It is shown that a variation in the (J-K) colour index as well as that in the UV continuum…
BM Eri - SR-type Variable Star
Brukhanov, I. S.
BD +20o 1171 (= NSV 16732 = TYCHO 1320 91 1 = HD 39785 = SAO 077726) is a long-periodic pulsating variable star of SRc-type with a period of 20930d, range of variations in B 8.8m - 10.3m, and the most realiable maximum is JD 2443410.5
The Investigation of Semi-Regular Variable UV Boo
Brukhanov, I. S.; Kudashkina, L. S.; Pikhun, A. I.
Periodogram analysis of the photographic observations of UV Boo based on Hipparcos data has showd two photometric periods: 596d± 47d and 11.74d± 0.01d and the same high peak on the value 10.60d± 0.02d. On Odessa plates data have showed three periods: 351.10d± 1.50d, 196.14d± 0.41d, 10.442d± 0.002d.