The optical light curve of the eclipsing LMXB EXO 0748-676.

Details The optical light curve of the eclipsing LMXB EXO 0748-676. The optical light curve of the eclipsing LMXB EXO 0748-676.

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc..191s&link_type=abstract

International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 191 - 192

Astronomy and Astrophysics

Astrophysics

X-Ray Binaries: Eclipsing Binaries, X-Ray Binaries: Light Curves, X-Ray Binaries: Photometry

Scientific paper

The authors present optical white-light photometry of the LMXB EXO 0748-676 (Porb = 3.82 h). Their data consist of short (15 s) CCD integrations covering a continuous 3.92 h interval and an eclipse in a later cycle. Structural detail in the eclipses and 2 optical bursts is resolved. From the measured burst frequency and light curve shape, the authors find indirect evidence to support Thomas et al.'s (1993) observation that the X-ray/optical relationship has changed since the initial outburst. They derive 2 optical eclipse centre times. However, the associated uncertainties are such that they cannot discriminate between the proposed X-ray ephemerides for this system.

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