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The X-ray eclipse of the LMC binary CAL 87ROSAT-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.
Document ID
19940033355
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Schmidtke, P. C.
(NASA Headquarters Washington, DC United States)
Mcgrath, T. K.
(NASA Headquarters Washington, DC United States)
Cowley, A. P.
(NASA Headquarters Washington, DC United States)
Frattare, L. M.
(Arizona State Univ. Tempe, United States)
Date Acquired
August 16, 2013
Publication Date
August 1, 1993
Publication Information
Publication: Astronomical Society of the Pacific, Publications
Volume: 105
Issue: 690
ISSN: 0004-6280
Subject Category
Astronomy
Accession Number
94A10010
Distribution Limits
Public
Copyright
Other

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