CAOSP abstracts, Volume: 29, No.: 2, year: 1999

Abstract: 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.

Full text version of this article in PostScript (600dpi) format compressed by gzip; or in PDF.

Back to:
CAOSP Vol. 29 No. 2 index
CAOSP archive main index
CAOSP main page
Astronomical Institute home page

Valid HTML 4.01! Valid CSS!

Last update: February 20, 2003