Swift J053041.9-665426, the new LMC X-ray transient, has a variable optical counterpart

Details Swift J053041.9-665426, the new LMC X-ray transient, has a variable optical counterpart Swift J053041.9-665426, the new LMC X-ray transient, has a variable optical counterpart

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3751....1c&link_type=abstract

The Astronomer's Telegram, #3751

Astronomy and Astrophysics

Astronomy

Optical, X-Ray, Request For Observations, Binary, Transient

Scientific paper

We have extracted the MACHO blue and red light-curves of the proposed counterpart of this new LMC X-ray transient, Swift J053041.9-665426. These cover the interval MJD49000-51600. The star is highly variable (by up to 0.3 mag) in both bands, and exhibits a ~415d candidate quasi-periodic modulation in the blue (although there are only approximately 4 cycles in the light-curve). Towards the end of the MACHO coverage (~MJD51400) the star has a large (~0.3mag) outburst that lasts ~200d.

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