Speaker
Dr
Veronique Pelassa
(University of Alabama in Huntsville)
Description
The Fermi observatory carries two complementary instruments for the observation of the gamma-ray sky, which allow for joint analyses of Gamma-Ray Bursts (GRB) over seven decades of energy. The Gamma-Ray Burst Monitor (GBM) covers the entire unocculted sky and is designed for gamma-ray transients' detection, monitoring and spectroscopy between 8 keV and 40 MeV. The Large Area Telescope (LAT) is a pair-conversion detector of high-energy gamma rays of energies ranging from 20 MeV to more than 300 GeV.
Since July 2008, the GBM detected over 800 GRB, of which 36 had a significant emission in LAT data. I will present GRB observations provided by Fermi and discuss how these fit in with both current and future space- and ground-based multi-messenger experiments: catalogs and population studies, some spectral and temporal characteristics including additional spectral components, searches for spectral cutoffs at high energies, delays between low- and high-energy gamma-ray emissions, long-lived emissions at GeV energies. Theoretical implications of these observations will be discussed: emission mechanisms, limits on the jet's bulk Lorentz factor from opacity constraints, limits on Lorentz invariance violation models.
Primary author
Dr
Veronique Pelassa
(University of Alabama in Huntsville)
