CAOSP abstracts, Volume: 25, year: 1995
- Author(s): SKOPAL, A.; HRIC, L.; CHOCHOL, D.; KOMZIK, R.; URBAN, Z.; PETRIK, K.;
NIARCHOS, P.; ROVITHIS-LIVANIOU, H.; ROVITHIS, P.; OPRESCU, G.; DUMITRESCU, A.;
ULYANIKHINA, O.; SCHWEITZER, E.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 25, p. 53-73.
- Date: 09/1995
- Title: Photometry of symbiotic stars - an international campaign. VI. Z And, EG And, V1413 Aql (AS 338), 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, PU Vul
- Keyword(s): STARS, BINARIES, SYMBIOTIC, PHOTOMETRY
- Pages: 53 -- 73
Abstract:
We present new observations of 19 symbiotic and symbiotic-like stars.
Photoelectric UBV(R) observations cover the 1993.75 to 1994.75 period. The
main results can be summarized as follows: Z And: the visual light curve (LC)
indicates a quiet stage of the star. EG And: The primary minimum at
JD 2 449 230 was observed. V 1413 Aql: The recent outburst has probably
finished. UV Aur: Historical photographic LC from 1895 December to 1963 March
is presented. It suggests changes in the periodicity of the brightness
variation being approximately between 395 and 360 days. TX CVn: A slow gradual
decrease in the star's brightness is observed. Historical photographic LC from
1906 May to 1992 March is presented. It indicates an increase in the activity
approximately at JD 2 434 000. T CrB: Observations indicate a decrease of
brightness mainly in U. BF Cyg: The star has returned to quiescence.
Historical photographic LC from 1896 October to 1992 September is presented.
CH Cyg: A gradual increase of the blue continuum during the current outburst
is observed. CI Cyg: The primary minima and a complex behavior around the
orbital phase 0.5 are seen in the recent visual LC. V1016 Cyg: No significant
changes in the UBV continuum are observed. AG Dra: The bright outburst which
began in 1994 June was discovered. CQ Dra:It was achieved the complete
coverage of the orbital cycle within CQ Dra A+B during this observing season.
YY Her: The minimum, probably corresponding to the eclipse of the hot by the
cool component in the binary, is observed in the visual LC at JD 2 449 511.
V443 Her: Visual LC shows the periodic wave-like variation along the orbital
cycle (delta m approx. 0.3) modulated with a variability of the red giant.
SS Lep: Two minima separated by approx. 830 days are seen in the visual LC.
AX Per: A major part of the broad primary minimum is observed. PU Vul: The
eclipse of the hot by the cool component was indicated best in B and V.
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