Photometry of symbiotic stars - an international campaign V. Z And, EG And, V1413 AQL (AS 338), UV Aur, TX CVn, T CrB, BF Cyg, CH Cyg, CI Cyg, V 1016 Cyg, V 1329 Cyg, AG Dra, CQ DRA (4 Dra), YY Her, V 443 Her, SS Lep, AG Peg, AX Per, FG Sge, PU Vul.
We present new observations of 20 symbiotic and symbiotic-like stars. Photoelectric UBV, photographic and visual observations were obtained during the 1992.75 to 93.75, 1955 to 93 and 1991.9 to 93.45 period, respectively. The main results can be summarized as follows: 1413 Aql: the time of the minimum is in a good agreement with the ephemeris; UV Aur: the decrease in the U, B and V brightness was observed about 110 days prior to the primary minimum (0.3 of the orbital period); TX CVn: long-term (about 9-year) variations in the star's brightness reached the minimum around JD 2 449 100; T CrB: the V light curve confirms the double wave during the whole orbital period; BF Cyg: the broad primary minimum observed in the UBV and visual bands agrees with our recent ephemeris; CH Cyg: the gradual increase in the star's brightness indicates the continuation of the current outburst; V 1016 Cyg: the orbital period (about 13-14 years) is probably present in U observations; CI Cyg: the time of the minimum is in a good agreement with the ephemeris; V 1329 Cyg: the long-term photographic observations confirm our ephemeris; CQ Dra: the gradual increase in the U band was observed during the last season; YY Her: the maxima of brightness observed in 1967 and 1993 probably reflect the orbital motion; FG Sge: photographic data obtained during 30 years of observations cover nearly the whole interval of activity of the system.
Contributions of the Astronomical Observatory Skalnate Pleso
- Pub Date:
- August 1994