Discovery of an Accreting Millisecond X-ray Pulsar in IGR J17511-3057

Details Discovery of an Accreting Millisecond X-ray Pulsar in IGR J17511-3057 Discovery of an Accreting Millisecond X-ray Pulsar in IGR J17511-3057

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.4322m&link_type=abstract

American Astronomical Society, HEAD meeting #11, #43.22

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Scientific paper

In September 2009, RXTE discovered that the gamma-ray source IGR J17511-3057 is an accreting X-ray millisecond pulsar with pulse frequency of 244.833951552(5) Hz. The pulsar is in a 208.12522(1) minute binary orbit around a companion star, with projected semi-major axis 275.185(3) lt-ms. The X-ray pulsed semi-amplitude is about 25%. Based on the orbital solution, the companion star must be a dwarf with minimum mass 0.13 solar masses, making this system similar to another accreting pulsar XTE J1814-338. In this paper, we present further detailed analysis of the X-ray timing data.

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