Deep Imaging Of A Candidate Isolated Neutron Star

Details Deep Imaging Of A Candidate Isolated Neutron Star Deep Imaging Of A Candidate Isolated Neutron Star

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..540a&link_type=abstract

NOAO Proposal ID #2008A-0540

Computer Science

Scientific paper

Only seven isolated radio-quiet neutron stars (XINS) emitting thermal X-rays are known, too few to address fundamental issues such as the equation of state of degenerate neutron matter. To expand this sample, we used the Sloan Digital Sky Survey (SDSS) to examine 10,000 ROSAT error circles and identified a dozen X-ray sources lacking plausible optical counterparts. Short Chandra observations of these XINS candidates pinpointed the sources, and the very small Chandra error circle of one observed candidate remained completely optically blank in SDSS, making this source a prime new XINS candidate. A follow-up observation with XMM-Newton provided us with the first measurements of the source's spectral energy distribution, but did not eliminate the possibility that it is a highly obscured AGN or a radio-quiet BL Lac. The deep optical imaging proposed here, which will require only an hour of Gemini North time to reach V~26 mag, will elucidate the nature of this intriguing blank-field X-ray source.

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