Discovery of a possible anomalous X-ray pulsar in the small magellanic cloud

R. C. Lamb, D. W. Fox, D. J. Macomb, T. A. Prince

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Abstract

We report the serendipitous detection of a previously unreported pulsar from the direction of the Small Magellanic Cloud using data from the Chandra X-Ray Observatory. Because of its luminosity (∼1.5 × 1035 ergs s-1), its near lack of variability for more than 20 yr, and its very soft spectrum, we propose that it is an anomalous X-ray pulsar (AXP). Data from the ROSAT PSPC in conjunction with the Chandra data give a period, P, of 5.44 s and a spin-down time, P/Ṗ, of 11 kyr. If this is a correct identification, it will be the first extragalactic AXP and the fastest yet discovered.

Original languageEnglish (US)
Pages (from-to)L29-L32
JournalAstrophysical Journal
Volume574
Issue number1 II
DOIs
StatePublished - Jul 20 2002

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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