Observations of a Bright GRB

Details Observations of a Bright GRB Observations of a Bright GRB

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1693g&link_type=abstract

Chandra Proposal ID #06500081

Mathematics

Probability

Chandra Proposal Id #06500081

Scientific paper

During Cycle 6, we propose time critical Chandra observations of a very bright gamma-ray burst discovered by HETE, with a fluence of >10^-4 ergs cm-2. HETE has detected one such burst in 3.5 years, so we estimate a probability of 0.3 of observing such an event during Cycle 6. We will search for X-ray spectral lines in such an event, using either ACIS-S/LETG for z<1, or ACIS-S/HETG for z>1, in a 100 ksec observation. The existence of such putative lines is an outstanding question: if real, they can reveal the circumburst chemical composition and geometry. The shape of the decay curve, including any absorption changes, will also bear critically upon the circumburst environment. The Chandra observations will be carried out as soon as is practical (4-12 days after the GRB).

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