Observations of the Transient X-Ray Pulsar 2s 1845-024

Details Observations of the Transient X-Ray Pulsar 2s 1845-024 Observations of the Transient X-Ray Pulsar 2s 1845-024

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..803f&link_type=abstract

Chandra Proposal ID #03400303

Astronomy and Astrophysics

Astronomy

Chandra Proposal Id #03400303

Scientific paper

2S 1845-024 is a 94 second transient X-ray pulsar which outbursts near the periastron passage of its highly eccentric, 242 day binary orbit. Its yet unidentified companion is likely a Be star. The source's outbursts have occurred regularly each orbit for at least the last 10 years. The source is unique in showing both evidence for its companion's equator being inclined with respect to the orbital plane, and in showing evidence for accretion disk formation during recurrent outbursts. Our proposal is to make Chandra ACIS-S/HETG observations during the outburst expected in September 2002 to study the spectral evolution associated with the disk formation. A secondary objective of our proposal is to obtain an accurate source position so that the optical companion may be identified.

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