The Location of the Most Intense Unidentified X-Ray Source on the Celestial Sphere

Details The Location of the Most Intense Unidentified X-Ray Source on the Celestial Sphere The Location of the Most Intense Unidentified X-Ray Source on the Celestial Sphere

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..187m&link_type=abstract

Chandra Proposal ID #01400904

Physics

Chandra Proposal Id #01400904

Scientific paper

We propose to use the unprecedented X-ray spatial resolution and aspect determination accuracy of AXAF to obtain the optical/IR identification of what may be the most intense but as yet unidentified steady X-ray source on the celestial sphere, GX17+2 (=X1813-140). Although this object is a prototype of the important Z-sources (which include Sco X-1 and Cyg X-2), evidence is now very strong that the long-accepted optical identification is incorrect. We have recently obtained HST NICMOS observations of the field which point the way towards reopening this perplexing problem of 25 years duration. The proposed observations will simultaneously provide a high-quality X-ray spectrum.

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