CAOSP abstracts, Volume: 29, No.: 2, year: 1999
- Author(s): PRIBULLA, T.; CHOCHOL, D.; PARIMUCHA, S.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 29, no. 2, p. 111-126.
- Date: 10/1999
- Title: Period and light-curve study of the eclipsing contact binary SW Lac
- Keyword(s): BINARIES, PHOTOMETRY
- Pages: 111 -- 126
New photoelectric U,B and V observations of the eclipsing contact binary SW
Lac were taken in 1998 and nine new minima times were determined. The (O-C)
diagram constructed using photographic and photoelectric minima times can be
explained by a secular increase of the period combined with a light-time
effect due to the presence of another two bodies in the system with orbital
periods P_3 = 23 and P_4 =(approx) 90 years. The minimum masses of these bodies
are M_3 = 0.41 +/- 0.03 M_Sun and M_4 = 1.47 +/- 0.03 M_Sun. Photometric
elements of the contact binary are given.
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