1987•The Astronomical JournalRequires access
The variable light curve of the X-ray transient EXO 0748 - 676
P. C. Schmidtke, A. P. Cowley
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Abstract
An optical light curve of the 3.8 hr eclipsing X-ray transient EXO 0748 - 676 was obtained in November 1985. The curve differs in shape from one observed in February 1985, although the overall brightness of the nova has not changed noticeably. No (B - V) color variation is found in the orbital cycle. Evidence is presented that one optical burst was observed. Possible interpretations of the variable light curve are discussed.