Fermi-LAT Observations of GRB 130427A
Abstract
The observations of the exceptionally bright GRB 130427A by the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope are providing new constraints on the nature of these unique astrophysical sources. GRB 130427A had the largest fluence, highest-energy photon (95 GeV), longest γ-ray duration (20 hours), and one of the largest isotropic energy releases ever observed from a GRB. The temporal and spectral analyses of the late-time high-energy emission observed by Fermi-LAT of GRB 130427A challenge the widely accepted model that the non-thermal high-energy emission in the afterglow phase of GRBs is synchrotron emission radiated by electrons accelerated at an external shock.
- Publication:
-
American Astronomical Society Meeting Abstracts #223
- Pub Date:
- January 2014
- Bibcode:
- 2014AAS...22335201Z