Where is OAO 1657-415?

Details Where is OAO 1657-415? Where is OAO 1657-415?

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..594c&link_type=abstract

Chandra Proposal ID #02400927

Computer Science

Chandra Proposal Id #02400927

Scientific paper

The high-mass X-ray binary OAO 1657-415 consists of a 38 s pulsar accreting from a (still unidentified) OB supergiant. The system is only the 7th known eclipsing X-ray binary, and the only one which seems to form a transient accretion disk from the companion's stellar wind. It provides a rare opportunity to measure a neutron star mass, if the optical companion can be identified. However, the X-ray position of this highly absorbed source is only known to 30 arcsec. I propose a short ACIS-HETG observation to determine its position precisely, and probe the stellar wind of the companion using fluorescent X-ray lines.

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