Authors:
PENA, JH; HOBART, MA; RODRIGUEZ, E
Journal:
REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA
Abstract:
Recent photoelectric-photometric data of the W UMa system SW Lacertae are reported. From the times of minima obtained in the present paper and those found in the literature, linear, quadratic and harmonic ephemeris are derived; the residuals show that the period variation of this system is not strictly periodic.
Keywords:
STARS ECLIPSING BINARIES; STARS VARIABLES