Optical identification of the LMC supersoft source RX J0527.8-6954 from MACHO project photometry
Open Access
- 11 October 1997
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 291 (1) , L13-L16
- https://doi.org/10.1093/mnras/291.1.l13
Abstract
We identify the likely optical counterpart to the Large Magellanic Cloud (LMC) supersoft X-ray source RX J0527.8–6954, and hence recover HV 2554. This identification is based on an analysis of ~ 4 yr of optical photometry obtained serendipitously via the MACHO project. We see a steady fading of the star of ~0.5 mag over the duration of the observations. Evidence is also presented for an orbital modulation of ~0.05-mag semi-amplitude on a period of P = 0.39262 ± 0.00015 d. Our optical observations are consistent with the suggestion that the X-ray decline in this system is caused by cooling after a weak shell flash.Keywords
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