The extreme late-time light curve of GRB 060729

Details The extreme late-time light curve of GRB 060729 The extreme late-time light curve of GRB 060729

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2385g&link_type=abstract

Chandra Proposal ID #09500130

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Chandra Proposal Id #09500130

Scientific paper

Conflicting results from optical measurements on one hand and recent Swift X-ray observations on the other challenging the predictions from the standard 'fireball' model of Gamma-Ray Bursts (GRBs) that jet openning angles can be determined from the light curve's break times: While optical light curves suggest early break times and therefore small opening angles, the Swift XRT observations show no jet breaks in the majority of afterglow light curves, even weeks after the trigger. Here we propose to observe the bright X-ray afterglow of GRB 060729 twice with Chandra for 80 ks at the beginning and 120 ks at the end of the AO-9 to extend its light curve beyond any X-ray afterglow that has ever been observed, putting strong constrains on the opening angle and GRB theory.

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