Chandra Identification of the X-Ray Counterpart of GRB020127

Details Chandra Identification of the X-Ray Counterpart of GRB020127 Chandra Identification of the X-Ray Counterpart of GRB020127

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop.1046f&link_type=abstract

Chandra Proposal ID #03508073

Physics

Chandra Proposal Id #03508073

Scientific paper

Roughly one-third of arcminute-scale gamma-ray burst (GRB) error boxes fail to yield any optical transient in spite of intensive ground-based follow-up efforts. These so-called "dark GRBs" are likely extinguished in the optical by dust and gas in their host galaxy: in the one dark GRB identified (in the radio) so far, GRB970828, modeling efforts indicate an extinction of >10 mags in R-band (Djorgovski et al. 2001). Such large extinctions are characteristic of molecular clouds and star-forming regions, and thus shed light on the nature of GRB progenitors. The 8-arcminute-radius error circle of GRB020127 was reported by the HETE-II team within 4.5 hours of the burst (GCN 1229), was well-placed for immediate observations, and was observed from at least two facilities (GCNs 1230, 1234), without identification of a counterpart. Our best hope for counterpart identification thus lies with the Chandra observations proposed here.

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