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.
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science