Optical photometry of the eclipsing Large Magellanic Cloud supersoft source CAL 87

Preprint

13 February 1997

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/9702119

Abstract

We present optical photometry of the eclipsing supersoft source, CAL87. These observations comprise long term data accumulated as a by-product of the MACHO Project, and high speed white light photometry of a single eclipse. We (i) derive an improved ephemeris of To = HJD 2450111.5144(3) + 0.44267714(6)E for the time of minimum light, (ii) find the eclipse structure to be stable over a period of 4 years, and (iii) investigate the colour variation as a function of orbital phase. The resolution afforded by the high speed nature of the white light observations enables us to see new structure in the light curve morphology.

Keywords

All Related Versions

Version 1, 1997-02-13, ArXiv
Published version: Monthly Notices of the Royal Astronomical Society, 287 (3), 699.

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