An Accurate Position for the Black Hole Candidate XTE J1908+094

Details An Accurate Position for the Black Hole Candidate XTE J1908+094 An Accurate Position for the Black Hole Candidate XTE J1908+094

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop.1062r&link_type=abstract

Chandra Proposal ID #03408089

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Chandra Proposal Id #03408089

Scientific paper

We request a 1 ksec ACIS-S scan of the new transient J1908+094, to obtain an accurate position to pin down a possible IR/radio counterpart, as well as a quick X-ray spectrum. The source was detected by chance during PCA observations of SGR 1900+014 on 21 Feb 2002; a scan on 18 Mar gave a 2' error box ~24' from the SGR, and showed it had risen from 26 to 64 mCrab (IAUC 7856). The timing characteristics (IAUC 7856) and a strong hard tail (IAUC 7861) make this a strong black hole candidate. The field is quite confused in the near IR, and although our INT I image (19 Mar) suggests a possible faint counterpart, our VLA data (21-22 Mar) show no radio source at that position, though there is another (~1 mJy) source within the RXTE error box. We need a Chandra position to either confirm the IR or radio counterpart, or to allow much deeper limits based on more accurate astrometry. There are other possibilities; the I band image for instance does not rule out a blue counterpart as in J1655-40.

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