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Viewing the High-Energy Universe with the Fermi Gamma-ray Space Telescope

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Abstract

The Fermi Gamma-ray Space Telescope (Fermi) was launched by NASA on June 11, 2008 and began its first year sky survey on August 11, 2008. The Large Area Telescope (LAT), a wide field-of-view pair-conversion telescope covering the energy range from 20 MeV to more than 300 GeV, is the primary instrument on Fermi. The Gamma-ray Burst Monitor (GBM) complements the LAT in its observations of transient sources and is sensitive to X-rays and γ-rays with energies between 8 keV and 40 MeV. During the first 2 years in orbit, Fermi has observed a large number of sources that include active galaxies, pulsars, compact binaries, globular clusters, γ-ray bursts (GRBs), as well as the Sun and the Moon. Fermi has also made important new measurements of the Galactic diffuse radiation and has made precise measurements of the spectrum of cosmic-ray electrons and positrons from 20 GeV to 1 TeV.

© 2010 Optical Society of America

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