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A major outburst from the X-ray binary RX J0520.5-6932

W. R. T. Edge·M. J. Coe·J. L. Galache·A. B. Hill
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Abstract

We report on the analysis of 8 years of MAssive Compact Halo Objects (MACHO) data for the source RX J0520.5-6932. A regular period of 24.4 days has been confirmed, however this is manifest almost entirely in the red part of the spectrum. A major outburst, lasting approximately 200 days, was observed which increased the apparent brightness of the object by approximately 0.15 magnitudes without significantly altering its V-R colour index. This outburst was also seen in X-ray data. The evidence from this analysis points to the identification of this object as a Be/X-ray binary with a periodically variable circumstellar disk and a very early optical counterpart.

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W. R. T. Edge, M. J. Coe, J. L. Galache, A. B. Hill. 2004-01-26. A major outburst from the X-ray binary RX J0520.5-6932. https://doi.org/10.1111/j.1365-2966.2004.07606.x

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