Hyper-energetic GRBs and GRB Energetics in the Fermi Era

Details Hyper-energetic GRBs and GRB Energetics in the Fermi Era Hyper-energetic GRBs and GRB Energetics in the Fermi Era

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21335201c&link_type=abstract

American Astronomical Society, AAS Meeting #213, #352.01; Bulletin of the American Astronomical Society, Vol. 41, p.492

Astronomy and Astrophysics

Astronomy

Scientific paper

We present broadband (radio - X-ray) observations of the long-duration gamma-ray bursts GRB050525A and GRB060418. Using our multi-parameter fitting software, we model the afterglows to extract constraints on the energetics, geometry, and environments of both events. Like many Swift bursts, we find little evidence for any achromatic jet break from either event to late times. The energetic implications of such widely beamed explosions would be profound, with total energy release in excess of 10e52 erg. We discuss the implications of this emerging class of hyper-energetic Swift GRBs, and the possibility of detecting such events in the future with Large Area Telescope on board Fermi.

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