NASA NTRS · 19940033355
The X-ray eclipse of the LMC binary CAL 87
Abstract
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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Schmidtke, P. C., Mcgrath, T. K., Cowley, A. P., Frattare, L. M.. 1993-08-01. The X-ray eclipse of the LMC binary CAL 87. https://ntrs.nasa.gov/citations/19940033355
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