Other
Scientific paper
Sep 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005cxo..prop.2072h&link_type=abstract
Chandra Proposal ID #07408237, p.1
Other
Chandra Proposal Id #07408237
Scientific paper
The transient 15.3 sec X-ray pulsar Swift J1626.6-5156 was discovered late 2005. It shares some properties with anomalous X-ray pulsars,but is most likely a 'normal' X-ray pulsar with some unusual properties. Determining the nature of the companion star could shed light on the mode of accretion (disk vs. wind), which in turn might help explain some of the unusual properties. Recent IR observations seem to rule out a HMXB as the optical counterpart of the source (ATel 713). Further attempts at identifying the optical counterpart are hampered by the uncertainty in the position of the source. The most accurate position has 90% an error circle of ~3.5 arcseconds (ATel 688). However, reliable counterparts to other X-ray sources have been found outside Swift/XRT error circles before (see e.g. Atel 712). The main goal of the proposed short HRC observation is to improve on the Swift/XRT position and thereby provide better constraints for identifying a possible optical/IR counterpart.
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