Abstract:

The Large Area Telescope (LAT) on the Fermi Gammay-ray Space Telescope mission began routine science operations in early August 2008 and has already detected several times more celestial high-energy gamma rays (20 MeV to >300 GeV) than all current and past instruments in this energy range combined. In addition, the very large acceptance of the LAT and the unique scanning mode of observation provide complete sky coverage ~8 times per day, an important capability for observing the dynamic high-energy sky. The status and early results from the LAT, including the LAT Bright Source List and diffuse gamma-ray mission, will be summarized.