The observations of the exceptionally bright gamma-ray burst (GRB) 130427A by the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope provide constraints on the nature of these unique astrophysical sources. GRB 130427A had the largest fluence, highest-energy photon (95 GeV), longest gamma-ray duration (20 hours), and one of the largest isotropic energy releases ever observed from a GRB. Temporal and spectral analyses of GRB 130427A challenge the widely accepted model that the nonthermal high-energy emission in the afterglow phase of GRBs is synchrotron emission radiated by electrons accelerated at an external shock.

Fermi-LAT Observations of the Gamma-Ray Burst GRB 130427A / Ackermann, M., Ajello, M., Asano, K., Atwood, W.B., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Baring, M.G., Bastieri, D., Bechtol, K., Bellazzini, R., Bissaldi, E., Bonamente, E., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Burgess J., M., Buson, S., et al.. - In: SCIENCE. - ISSN 0036-8075. - 343:6166(2014), pp. 42-47. [10.1126/science.1242353]

Fermi-LAT Observations of the Gamma-Ray Burst GRB 130427A

BISSALDI, Elisabetta;FAVUZZI, Cecilia;GIGLIETTO, Nicola;
2014

Abstract

The observations of the exceptionally bright gamma-ray burst (GRB) 130427A by the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope provide constraints on the nature of these unique astrophysical sources. GRB 130427A had the largest fluence, highest-energy photon (95 GeV), longest gamma-ray duration (20 hours), and one of the largest isotropic energy releases ever observed from a GRB. Temporal and spectral analyses of GRB 130427A challenge the widely accepted model that the nonthermal high-energy emission in the afterglow phase of GRBs is synchrotron emission radiated by electrons accelerated at an external shock.
2014
Fermi-LAT Observations of the Gamma-Ray Burst GRB 130427A / Ackermann, M., Ajello, M., Asano, K., Atwood, W.B., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Baring, M.G., Bastieri, D., Bechtol, K., Bellazzini, R., Bissaldi, E., Bonamente, E., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Burgess J., M., Buson, S., et al.. - In: SCIENCE. - ISSN 0036-8075. - 343:6166(2014), pp. 42-47. [10.1126/science.1242353]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/846
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