Abstract
ABSTRACT. During a systematic study of SX Phe stars which is being carried out at the National Observatory at San Pedro Yartir, B.C. Mexico, it has been discovered that the star, LZ Her, previously reported as a class SX Phe star (Frolov and Irkaev 1984), with the following characteristics: V = 14.3 mag, P = 0.199 d, and AV = 0.5 mag, is not a star of that class. The light curve (Figure 2) obtained through differential photometry which was performed at the 1.5-m telescope and with the Danish Photometer (which permits simultaneous obtention of data in the vbq Str6mgren filters), indicates that this is a binary star in contact of the W Ursa Majoris type whose light curves show maxima with great curvature, and minima which are almost as deep. The period determined for LZ Her was 0.3338 d with a temporal coverage of three cycles. t: : STARS-BINARY - STARS-SX PHE - STARS- W UMA
