CAOSP abstracts, Volume: 23, year: 1993
- Author(s): HRIC, V.; SKOPAL, A.; URBAN, Z.; KOMZIK, R.; LUTHARDT, R.; PAPOUSEK, J.;
HANZL, D.; BLANCO, C; NIARCHOS, P.; VELIC Z.; SCHWEITZER, E.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 23, p. 73-106.
- Date: 07/1993
- Title: Photometry of symbiotic stars - an international campaign IV. Z And, EG And, R Aqr, UV Aur, TX CVn, T CrB, BF Cyg, CH Cyg, CI Cyg, V 1016 Cyg, AG Dra, CQ Dra (4 Dra), YY Her, V 443 Her, SS Lep, AG Peg, AX Per, FG Sge, V 1017 Sgr, FG Ser (AS 296), PU Vul, AS 338, AS 360, MWC 560, GH Gem, He2-468
- Keyword(s): STARS, BINARIES, SYMBIOTIC, PHOTOMETRY
- Pages: 73 -- 106
Abstract:
We present new observations of 26 symbiotic and symbiotic-like stars. The
photoelectric UBV observations were made during the years 1982-92, the
photographic in 1989-92 and visual in 1989-92. The most interesting results
can be summarized as follows: EG And: There is an apparent increase in all
three colours corresponding to the ascending branch of the secondary minimum.
UV Aur: The long-term photoelectric photometry supports our earlier
identification of the red giant component as the primary cause of light
variations. BF Cyg: UBV data cover well the last active phase of the star with
maximum around 1990 July. CH Cyg: The photoelectric data cover the sudden
light brightening starting in Feb-Mar 1992 and decline in Sep 1992. CI Cyg:
Long-term UBV observations are presented. AG Dra: UBV photometry cover almost
all the interval since the last outburst. CQ Dra: The star's brightness has
been decreasing monotonically during the present observational period. AX Per:
Our UBV data reveal an outburst (maximum around Nov 1989) with a total of five
minima occurring during the observational interval.
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