1. Peter F. Michelson Stanford University Principal Investigator, Large Area Telescope Collaboration peterm@stanford.edu on behalf of the Fermi LAT Collaboration and the Fermi mission

2. GLAST renamed Fermi by NASA on August 26, 2008 http://fermi.gsfc.nasa.gov/ “ Enrico Fermi (1901-1954) was an Italian physicist who immigrated to the United States. He was the first to suggest a viable mechanism for astrophysical particle acceleration. This work is the foundation for our understanding of many types of sources to be studied by the Fermi Gamma-ray Space Telescope, formerly known as GLAST. ” DoE – NASA – international partnership

3. LAT images the sky one photon at a time:  -ray converts in LAT to an electron and a positron ; direction and energy of these particles tell us the direction and energy of the photon GBM

4.  France  IN2P3, CEA/Saclay  Italy  INFN, ASI, INAF  Japan  Hiroshima University  ISAS/JAXA  RIKEN  Tokyo Institute of Technology  Spain  ICREA and Institut de Ciencies de l'Espai  Sweden  Royal Institute of Technology (KTH)  Stockholm University  United States  Stanford University (SLAC and HEPL/Physics)  University of California at Santa Cruz - Santa Cruz Institute for Particle Physics  Goddard Space Flight Center  Naval Research Laboratory  Sonoma State University  Ohio State University  University of Washington Principal Investigator: Peter Michelson (Stanford University) ~270 Members (~90 Affiliated Scientists, 37 Postdocs, and 48 Graduate Students) construction managed by Stanford Linear Accelerator Center (SLAC), Stanford University

5. PRELIMINARY

6. > 2000 AGNs blazars and radiogal = f( ,z) evolution z < 5 Sag A* 10-50GRB/year 10-50 GRB/year GeV afterglow spectra to high energy Cosmic rays and clouds acceleration in Supernova remnants OB associations propagation (Milky Way, M31, LMC, SMC) Interstellar mass tracers in galaxies Possibilities starburst galaxies galaxy clusters measure EBL unIDs Dark Matter neutralino lines sub-halo clumps  -ray binaries Pulsar winds  -quasar jets Pulsars emission from radio and X-ray pulsars blind searches for new Gemingas magnetospheric physics pulsar wind nebulae

7. Years Ang. Res. (100 MeV) Ang. Res. (10 GeV) Eng. Rng. (GeV) A eff Ω (cm 2 sr) #  -rays EGRET1991–005.8°0.5°0.03–10750 1.4 × 10 6 AGILE2007–4.7°0.2°0.03–501,500 4 × 10 6 /yr Fermi LAT 2008–3.5°0.1°0.02–30025,0001 × 10 8 /yr AGILE (ASI) EGRET Fermi / LAT LAT has already surpassed EGRET and AGILE celestial gamma-ray totals Unlike EGRET and AGILE, LAT is an effective All-Sky Monitor whole sky every ~3 hours CGRO EGRET

8. June 11, 2008 12:05 pm (EDT)

10. GLAST Large Area Telescope GLAST First Light Seminar, 26 Aug 2008 10

12. Center of the Milky Way PSR J1706-44

13. Vela (2 cycles, P=89.3 ms)Geminga (2 cycles, P=237.1 ms) Crab pulsar (P=33.4 ms) PSR B1055-52 (2 cycles, P=197 ms)PSR B1706-44 (2 cycles, P=102.4 ms) In a few days, Fermi confirmed the EGRET pulsars and found new  -ray pulsars as well

14. 3C454.3 Supermassive black hole 8 billion light-years from us

15.  The Fermi Gamma-ray Space Telescope is fully operational..  In just a few days, the Large Area Telescope (LAT) corroborated many of the great discoveries of EGRET and AGILE; now finding new sources as well;  Undoubtedly, the most exciting is yet to come as we have just started the all-sky survey phase and with time probe deeper and deeper into the high-energy Universe