Precise astrometry of the X-ray sources 4U1700+24 and 4U1954+319

Details Precise astrometry of the X-ray sources 4U1700+24 and 4U1954+319 Precise astrometry of the X-ray sources 4U1700+24 and 4U1954+319

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1668m&link_type=abstract

Chandra Proposal ID #06400127

Astronomy and Astrophysics

Astronomy

Chandra Proposal Id #06400127

Scientific paper

We propose to observe two peculiar galactic X-ray sources, 4U1700+24 and 4U1954+319, which are suspected to have an M-type giant star as optical counterpart, in order to get an high-precision astrometric position for both of them. This would definitely settle the issue of the identification of their true optical counterpart, which is important given that X-ray binary systems with a red giant as confirmed companion are extremely rare. Two very short (`snapshot') observations with Chandra will secure this result.

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