Optical identification of the LMC supersoft source RX J0527.8-6954 from MACHO project photometry

C. Alcock, R. A. Allsman, D. R. Alves, T. S. Axelrod, D. R. Bennett, P. A. Charles, K. H. Cook, K. C. Freeman, K. Griest, M. J. Lehner, M. Livio, S. L. Marshall, D. Minniti, B. A. Peterson, M. R. Pratt, P. J. Quinn, A. W. Rodgers, K. A. Southwell, C. W. Stubbs, W. Sutherland

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)L13-L16
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
Publication statusPublished - 1997


  • Accretion, accretion discs
  • Binaries: Close
  • Binaries: Spectroscopic
  • Stars: Individual: RX J0527.8-6954
  • X-rays: Stars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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