The X-ray eclipse of the LMC binary CAL 87

Details The X-ray eclipse of the LMC binary CAL 87 The X-ray eclipse of the LMC binary CAL 87

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105..863s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 690, p. 863-866.

Astronomy and Astrophysics

Astronomy

37

Eclipsing Binary Stars, Magellanic Clouds, X Ray Binaries, Accretion Disks, Light Curve, Stellar Coronas, Stellar Orbits, Stellar Spectrophotometry

Scientific paper

ROSAT-PSPC observations of the LMC eclipsing binary CAL 87 show a short-duration, shallow X-ray eclipse which coincides in phase with the primary optical minimum. Characteristics of the eclipse suggest the X-ray emitting region is only partially occulted. Similarities with the eclipse of the accretion-disk corona in X 1822-37 are discussed. However, no temperature variation through eclipse is found for CAL 87. A revised orbital period, combining published data and recent optical photometry, is given.

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