SXP523 = Suzaku J0102-7204 = 2XMM J010247.4-720449, a Be/X-ray binary pulsar in the SMC
ATel #4648; F. Haberl, R. Sturm (Max Planck Institute for extraterrestrial Physics), M. Tsujimoto (JAXA/ISAS), Q. Wada, K. Ebisawa (Univ. Tokyo, JAXA/ISAS), E. Miller (MIT), M. J. Coe, H. Klus (Univ. of Southampton), A. P. Beardmore (Univ. Leicester)
on 13 Dec 2012; 19:54 UT
Credential Certification: Frank Haberl (fwh@mpe.mpg.de)
Subjects: Optical, X-ray, Binary, Neutron Star, Transient
Referred to by ATel #: 4719
After application of an attitude correction to the Suzaku observation of the supernova remnant 1E 0102.2-7219 described in ATel #4628, we derive an improved position for the X-ray pulsar Suzaku J0102-7204 of R.A. = 01:02:46.8, and Dec. = -72:04:56 (J2000, 1 sigma uncertainty of 20 arcsec). The new position is consistent with that of the Be/X-ray binary 2XMM J010247.4-720449 in the Small Magellanic Cloud seen by XMM-Newton, Swift and Chandra (ATel #3761) and most likely all detections are from the same source. The X-ray luminosity during the Suzaku observation was a factor of 2.6 higher than seen during the Swift observation, resulting in a flux ratio between outburst and quiescence of at least 80.
Observations from the SAAO 1.9m on 8 Dec. 2012 detected evidence for a weak Hα emission line from the candidate star proposed in ATel #3761 with an equivalent width of 4 +/- 1 Å. This indicates the presence of a small circumstellar disk which would have been responsible for fuelling the X-ray outburst 6 weeks earlier.
