Determination of the Position of the Millisecond Pulsar XTE J1807-294

Details Determination of the Position of the Millisecond Pulsar XTE J1807-294 Determination of the Position of the Millisecond Pulsar XTE J1807-294

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1358m&link_type=abstract

Chandra Proposal ID #04408141

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Chandra Proposal Id #04408141

Scientific paper

Millisecond pulsars are probably the endpoint of evolution of low mass X-ray binaries (LMXBs). However, the actual detection of neutron star spin frequencies in LMXBs has been problematic. To date, four accreting millisecond pulsars have been found, with the fourth, XTE J1807-294 having been discovered 25 Feb 2003. Three of the four known pulsars have orbital periods of 35-43 min, which suggests that there is a common evolutionary origin. We request Chandra HRC-S observations in "Imaging Mode" primarily to determine the position. This will enable observations at other wavelengths. Detection of an optical counterpart of XTE J1807-294, in outburst or quiescence, can aid in determining the system size and inclination, but because of the confused galactic center region, it is important to have a precise a priori position.

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