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Institute for the Physics and Mathematics of the UniverseWPI

IPMU seminar

Date: October 30, 2008, 13:30 - 14:30
Place: Seminar Room at IPMU Prefab. B, Kashiwa Campus of the University of Tokyo
Speaker: Hiromitsu Takahashi (GLAST)
Title: The Fermi Gamma-ray Space Telescope [PDF]
Abstract: The Fermi Gamma-ray Space Telescope, formerly called GLAST, is a mission to measure the cosmic gamma-ray flux in the energy range 20 MeV to >300 GeV, with supporting measurements for gamma-ray bursts from 8 keV to 30 MeV. The main instrument Large Area Telescope (LAT) is a pair conversion telescope built by a large international collaboration, using silicon micro-strip detectors for tracking of photon pair conversion products, a CsI calorimeter with large dynamic range of energy readout and a high efficiency, segmented anti-coincidence shield for charged particle background rejection. The LAT has a large instantaneous field of view allowing it to sweep the entire sky every 2 orbits (approx. 190 minutes), with an energy resolution between 5% and 15%, and an angular resolution of a few degrees at 100MeV and rapidly improving to less than 1 degree at 1GeV and 0.1 degrees at 100GeV. With its recent launch on 11 June 2008, Fermi now opens a new and important window on a wide variety of phenomena, including pulsars, black holes and active galactic nuclei, gamma-ray bursts, the origin of cosmic rays and supernova remnants, and searches for hypothetica new phenomena such as supersymmetric dark matter annihilations. This talk includes early scientific results as well as a description of the instruments and the mission status.