Optical Light Curve of the X-ray Pulsar Swift J0513.4-6547

Astronomy and Astrophysics – Astronomy

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Optical, X-Ray, Binaries, Neutron Stars, Pulsars

Scientific paper

We have identified the optical counterpart of the X-ray pulsar Swift J0513.4-6547 (Krimm et al. 2009, ATel #2011) as LMC star 59.5431.442 in the MACHO database, with R(mean)~15.6 and V-R~+0.05. The source shows ~0.3 mag (swooping) variations on time scales of a few hundred days. Such behavior is typical of some X-ray/pulsar systems. A detailed period analysis reveals no coherent periodicities between 0.3 and 1000 days.

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