Data analysis of the Fermi Large Area Telescope Massimiliano Razzano (INFN-Pisa)‏ On behalf of the Fermi-LAT collaboration (With the kind contribution of many LAT people) MAPS - Perugia (22 October 2009)‏ Launch! •  Launch from Cape Canaveral Air Force Station 11 June 2008 at 12:05PM EDT •  Circular orbit, 565 km altitude (96 min period), 25.6 deg inclination. The Observatory Large AreaTelescope (LAT) 20 MeV - >300 GeV Gamma-ray Burst Monitor (GBM) NaI and BGO Detectors 8 keV - 30 MeV KEY FEATURES •  Huge field of view Spacecraft Partner: – LAT: 20% of the sky at any General Dynamics instant; in sky survey mode, expose all parts of sky for ~30 minutes every 3 hours. GBM: whole unocculted sky at any time. •  Huge energy range, including largely unexplored band 10 GeV - 100 GeV. Total of >7 energy decades! •  Large leap in all key capabilities. Great discovery potential. Overview of LAT: How it works γ Tracker e+ e– ACD [surrounds Calorimeter 4x4 array of TKR towers] Atwood et al, ApJ submitted