Localization of Optically-Dark Gamma-Ray bursts by Chandra and HST

Details Localization of Optically-Dark Gamma-Ray bursts by Chandra and HST Localization of Optically-Dark Gamma-Ray bursts by Chandra and HST

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9276r&link_type=abstract

HST Proposal ID #9276

Physics

Hst Proposal Id #9276

Scientific paper

We propose Chandra {CXO} observations of 4 GRBs detected by the HETE soft X-ray camera, with contemporaneous observations with HST. These observations are "relaxed" TOOs, performed 7-16 days after burst detection. To optimize the chance of isolating Z>10 GRBs, we will select "dark GRBs" for which no optical counterpart has been found by ground-based searches withing 2 days of GRB onset. Previous CXO GRB searches have required that observations start within 24 hours of burst onset, placing an enormous strain on CXO operations. We have determined that 30 ks observations made 7-16 days after burst onset will detect sufficient photons to allow <0.7" locatization of the GRB afterglow. We will immediately place all CXO and HST positions and intensities in the public domain via the GCN.

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