ABOUT BOOK

The Fermi Gamma-ray Space Telescope, which was launched by NASA in June 2008, is a powerful space observatory which studies the high-energy gamma-ray sky Atwood (2009). ~ ~Fermi’s main instrument, the Large Area Telescope (LAT), detects photons in an energy range ~ ~between 20 MeV to greater than 300 GeV. The LAT is much more sensitive than its predecessor, ~ ~the EGRET telescope on the Compton Gamma Ray Observatory, and is expected to find ~ ~several thousand gamma-ray point sources, which is an order of magnitude more than its ~ ~predecessor EGRET Hartman et al. (1999).