Observations of Gamma-Ray Bursts at high energies by the Fermi Large Area Telescope--two years review

Details Observations of Gamma-Ray Bursts at high energies by the Fermi Large Area Telescope--two years review Observations of Gamma-Ray Bursts at high energies by the Fermi Large Area Telescope--two years review

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aipc.1358...41p&link_type=abstract

GAMMA RAY BURSTS 2010. AIP Conference Proceedings, Volume 1358, pp. 41-46 (2011).

Computer Science

1

Telescopes, Spectroscopy, Lorentz Transformation, Spectral Analysis, Space-Based Ultraviolet, Optical, And Infrared Telescopes, Spectroscopy And Spectrophotometry, Lorentz And Poincare Invariance, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification

Scientific paper

The Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope is a pair-conversion detector of high-energy γ rays of energies ranging from 20 MeV to more than 300 GeV. It operates in synergy with the Gamma-ray Burst Monitor (GBM), which covers the entire unocculted sky and is designed for γ-ray transients' detection and spectroscopy between 8 keV and 40 MeV. Since July 2008, the GBM detected over 500 Gamma-Ray Bursts (GRB), 21 of them had a significant emission in LAT data. The present proceeding is an overview of the features revealed in the GBM/LAT combined analyses of these GRB: additional spectral components, searches for spectral cutoffs at the highest energies, delays between low- and high-energy γ-ray emissions, long-lived emissions at GeV energies. Finally, we will discuss some implications of these observations: emission mechanisms, limits on the jet's bulk Lorentz factor from opacity constraints, limits on Lorentz invariance violation models.

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