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Optical studies of two LMC X-ray transients : RX J0544.1-7100 and RX J0520.5-6932

M. J. Coe·I. Negueruela·D. A. H. Buckley·N. J. Haigh·S. G. T. Laycock
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Abstract

We report observations which confirm the identities of the optical counterpart to the transient sources RX J0544.1-7100 and RX J0520.5-6932. The counterparts are suggested to be a B-type stars. Optical data from the observations carried out at ESO and SAAO, together with results from the OGLE data base, are presented. In addition, X-ray data from the RXTE all-sky monitor are investigated for long term periodicities. A strong suggestion for a binary period of 24.4d is seen in RX J0520.5-6932 from the OGLE data.

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M. J. Coe, I. Negueruela, D. A. H. Buckley, N. J. Haigh, S. G. T. Laycock. 2001-01-11. Optical studies of two LMC X-ray transients : RX J0544.1-7100 and RX J0520.5-6932. https://doi.org/10.1046/j.1365-8711.2001.04327.x

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