A new X-ray pulsar has been detected in the SMC using archive Chandra data (CXOU J005323.8-722715).
ATel #220; W. R.T. Edge, M. J. Coe and V. A. McBride (Southampton University)
on 22 Jan 2004; 16:45 UT
Credential Certification: W R T Edge (wrte@astro.soton.ac.uk)
Subjects: X-ray, Binary, Transient, Pulsar
A new X-ray pulsar has been detected in the SMC using archive Chandra data. An examination of Chandra Observation ID 2947, which took place between 2002-07-20 23:03:50 and 2002-07-21 01:46:41 (Zezas et al. astro-ph/0310562, 2003), shows an X-ray source at R.A. = 00h53m23.8s Decl. = -72d27m15s (equinox 2000) with a 90% confidence radial uncertainty of 0.6 arcsec. Timing analysis on this object revealed a period of 138.04 seconds +/- 0.61 seconds with a confidence of 98%. The position of this pulsar is coincident with emission-line star [MA93] 667 and also with MACHO object 207.16202.50 at R.A.=0h53m23.9s Decl.= -72d27m15s (equinox 2000). The latter shows evidence of a period of 125 days +/- 1.5 days. This period would be consistent with that predicted from the Corbet diagram for a 138s Be/X-ray pulsar.
