2010/11/29 by Aurelien Bouvier, Bouvier, Aurelien · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Astrophysical Phenomena (astro-ph.HE) #Particle Detector Development and Performance
paper · pdf · doi:10.48550/arxiv.1012.0558
openalex publication_date 2010/11/29 · openalex created_date 2022/10/01 · openalex updated_date 2026/07/28
The Fermi Gamma-ray Space Telescope with its main instrument onboard, the\nLarge Area Telescope (LAT), opened a new era in high-energy astrophysics and in\nparticular for the study of Gamma-Ray Bursts (GRBs), which are short flashes of\n-rays associated with the brightest and most distant events ever observed in\nour universe after the Big Bang. My thesis work focused primarily on the\nobservations of this phenomenon with the LAT (20 MeV - 300 GeV) and the\nGamma-ray Burst Monitor (10 keV - 40 MeV) onboard the Fermi satellite. After\ndescribing the procedure used for detection and analysis of LAT GRBs, I will\nprovide an overview of the temporal and spectral features observed during the\nprompt emission of these events after one year and a half of operation for\nFermi. GRBs can also be used as a tool to probe interesting physics. My focus\nwill be on the detection of very high energy photons (typically above 10 GeV)\nassociated with LAT GRBs and which were used to set significant constraints\nboth on a possible violation of Lorentz invariance - which postulates that all\nobservers measure exactly the same speed of light in vacuum, independently of\nphoton energy - and on the Optical-Ultraviolet extragalactic background light\nin the Universe.\n