B and V Lightcurves of the Very Shortperiod Binary V523-Cassiopeiae

Details B and V Lightcurves of the Very Shortperiod Binary V523-Cassiopeiae B and V Lightcurves of the Very Shortperiod Binary V523-Cassiopeiae

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99.1310s&link_type=abstract

Publications of the Astronomical Society of the Pacific, Vol. 99, NO. 622/DEC, P.1310, 1987

Astronomy and Astrophysics

Astronomy

10

Scientific paper

The very short-period eclipsing binary system V523 Cas was observed on three consecutive nights with the facilities at Lowell Observatory. The observations covering the eclipse portions of the light curves yielded six epochs of minimum light and an imprnved ephemeris. A period study covering more than 23,000 cycles revealed that a period increase took place about ten years ago. The light curves, defined by 460 observations with the B filter and 458 with the V filter, are of the W Ursae Majoris type and are asymmetric. The maximum following the primary minimum averages 0m.02 fainter and 0m.005 redder than the maximum following the secondary minimum. There is evidence of an O'Connell effect with a possible period of about five years.

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