A Search for Jet Breaks in Long GRB afterglows

Details A Search for Jet Breaks in Long GRB afterglows A Search for Jet Breaks in Long GRB afterglows

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2152g&link_type=abstract

Chandra Proposal ID #08500010

Physics

Chandra Proposal Id #08500010

Scientific paper

In the standard 'fireball' model for GRB afterglows, the jet opening angle can be determined from the jet break time. Previous studies have found jet break times of the order of a few days, implying jet angles of < 5 degrees. Surprisingly, the X-ray light curves observed by Swift seem to be in conflict with earlier results, with no observable jet break for many bursts in the first 10 days. This implies far less collimation than previously thought, and has a strong impact on the derived explosion energies. In order to search for late jet breaks, we propose to follow 4 carefully chosen GRB afterglows with late-time observations by Chandra.

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