SMC X-ray source SXP85.4 is revealed to be the same source as SXP91.1

Astronomy and Astrophysics – Astronomy

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X-Ray, Binary, Neutron Star, Transient, Pulsar

Scientific paper

Following on the report of a proposed new Be/X-ray binary pulsar system in the SMC (ATel #2813), an INTEGRAL ToO observation was carried out on 20 May 2011 after RXTE had detected the source again on 13 May 2011. The INTEGRAL observations revealed a clear source in the JEM-X detectors at RA,Dec (2000)=(12.727,-72.237) with a significance of 4.7 sigma and an uncertainty of a few arcminutes. This position is consistent with a previously known Be/X-ray system SXP91.1 which we believed had not been detected in our RXTE monitoring of the SMC for several years.

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