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.
Cite
@article{arxiv.astro-ph/9702119,
title = {Optical photometry of the eclipsing Large Magellanic Cloud supersoft source CAL 87},
author = {C. Alcock},
journal= {arXiv preprint arXiv:astro-ph/9702119},
year = {2015}
}