The High Latitude Neutron Star X-Ray Transient XTE J2123-058

Details The High Latitude Neutron Star X-Ray Transient XTE J2123-058 The High Latitude Neutron Star X-Ray Transient XTE J2123-058

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..811t&link_type=abstract

Chandra Proposal ID #03400614

Physics

Chandra Proposal Id #03400614

Scientific paper

XTE J2123-058 is a high Galactic latitude neutron star transient. The high latitude of the source provides the observational advantage of low extinction, which is critical for soft X-ray and optical observations. From optical spectroscopy, we find that the source distance is near 8.9 kpc, making it unusually far from the Galactic plane for an LMXB. We previously obtained an X-ray luminosity upper limit of 3.6E33 erg/s for this source with BeppoSAX, and more sensitive observations are required. I propose to observe XTE J2123-058 with Chandra to measure its luminosity. Although a detection is likely, a non-detection will provide a luminosity upper limit of 3E31 erg/s, which has implications for the question of whether quiescent black hole systems are dimmer than neutron star systems.

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