CAOSP abstracts, Volume: 26, No.: 1, year: 1996
- Author(s): HRIC, L.; SKOPAL, A.; URBAN, Z.; PETRIK, K.; KOMZIK, R.; CHOCHOL, D.;
PRIBULLA, T.; NIARCHOS, P.; ROVITHIS-LIVANIOU, H.; ROVITHIS, P.; VELIC, Z.;
OKSA, G.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 26,, no. 1, p. 46-64.
- Date: 08/1996
- Title: Photometry of symbiotic stars - an international campaign. VIIa. Z And, EG And, V1413 Aql (AS 338), UV Aur, TX CVn, T CrB, BF Cyg, CH Cyg, V 1016 Cyg, V 1329 Cyg, AG Dra
- Keyword(s): STARS, BINARIES, SYMBIOTIC, SYMBIOTIC-LIKE, PHOTOMETRY
- Pages: 46 -- 64
Abstract:
We present new observations of 11 symbiotic and symbiotic-like stars. The
photoelectric UBV(R) observations described here cover the period spanning
from 1994.75 to 1996.0. Some CCD VRI and photographic data were obtained also
during the earlier times. The main results obtained during this campaign
period can be summarized as follows: Z And: The UBV light curves (LC) indicate
a small brightening of the star around JD 2 449 750. EG And: Standard phase
dependent behavior -- an increase in the star's brightness from orbital phase
phi approx 0 (around JD 2 449 700) to phi approx 0.7 (approx JD 2 450 050) -
is apparent in our light curves. UV Aur: Two approx 390-day cycles were covered
by our observations. Variations in the V and R bands are similar. TX CVn: Very
slow brightness decline from the previous active stage has continued during
the present period. BF Cyg: A minimum around JD 2 449 900 was observed - in
agreement with the ephemeris given by Pucinskas (1970). CH Cyg: During the
period Oct. 15th 1994 -- Jan 16th 1995 a minimum corresponding to the eclipse
of the hot component by the red giant occurred. The sudden fading of the star
in the U and B colours suggests that the 1992 outburst is over. AG Dra: The
present data cover a major part of the recent (1994) outburst. A second
maximum has been observed during the summer of 1995. Afterwards, the system's
brightness has been declining towards the quiescence.
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