Discovery of a Possible Anomalous X-Ray Pulsar in the Small Magellanic Cloud | Zendy

R. C. Lamb | Zendy; D. B. Fox | Zendy; D. J. Macomb | Zendy; Thomas A. Prince | Zendy

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Discovery of a Possible Anomalous X-Ray Pulsar in the Small Magellanic Cloud

Author(s) -

R. C. Lamb,

D. B. Fox,

D. J. Macomb,

Thomas A. Prince

Publication year - 2002

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/342352

Subject(s) - pulsar , rosat , physics , astrophysics , luminosity , observatory , large magellanic cloud , astronomy , small magellanic cloud , conjunction (astronomy) , x ray pulsar , stars , galaxy

We report the serendipitous detection of a previously unreported pulsar fromthe direction of the Small Magellanic Cloud using data from the CHANDRA X-RayObservatory. Because of the luminosity of about 1.5x10^35 ergs/s, its near lackof variability for more than 20 years, and its soft spectrum we propose that itis an anomalous X-ray pulsar (AXP). Data from the ROSAT PSPC in conjunctionwith the CHANDRA data give a period, P, of 5.44 s and a spin down time, Pdot/P,of 11 ky. If this is a correct identification it will be the firstextragalactic AXP and the fastest yet discovered.Comment: Current version accepted for publication in the Astrophysical Journal Letter

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