Ultraviolet photometry from the Orbiting Astronomical Observatory. XII. The eclipsing binary LY Aurigae.

The eclipsing binary LY Aur (09.5 III) was observed over a period of four days in 1972 March with the Wisconsin instrumentation on OAO-2. Complete light curves were obtained at the following wavelengths: 4250, 3320, 2980, 2460, 1910, and 1550 A. The difference in phase between successive observations was 0.017. Where there is overlap (A4250 and A3320), the satellite observations agree with ground-based observations within the uncertainties of the data. The light curves at all wavelengths indicate the presence of strong tidal interaction. The primary eclipse depth increases in the ultraviolet, while the secondary eclipse depth remains almost constant. Subject headings: early-type stars - eclipsing binaries - stars, individual - ultraviolet