Physics
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cxo..prop.1845h&link_type=abstract
Chandra Proposal ID #05508186
Physics
Chandra Proposal Id #05508186
Scientific paper
We propose to examine the error box of the second unidentified TeV gamma-ray source. The IACT array H.E.S.S. has discovered a source in the 0.6-10 TeV range, designated VHE J1303-63. It is 0.65 deg north of the famous Be/X-ray pulsar PSR B1259-63, which was also detected. But the new source is even brighter than the pulsar, about 0.1 Crab, and its statistical significance is at least 13 sigma (Beilicke, et al. 2004 Heidelberg Gamma-Ray Meeting, and Beilicke, Aharonian, Heinzelmann, Hofmann, Wagner, private comm.) The error box of VHE J1303-63 was covered only by a ROSAT observation, which does not show any counterpart within the error circle. Since this source is in the Galactic plane (as is the first unidentified TeV source J2032+4130), it is likely that its X-ray counterpart is highly absorbed. In a Chandra DDT observation of TeV J2032+4130, we found a possible hard X-ray counterpart (Mukherjee et al. 2003, ApJ, 589, 487). We propose a similar search for VHE J1303-63.
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