Jean Ballet, Isabelle Grenier CEA Saclay DSM/IRFU/SAp

1. Jean Ballet, Isabelle Grenier CEA Saclay DSM/IRFU/SAp GLAST: schedule and science program on behalf of the LAT collaboration

2. GLASTObservatory • Large Area Telescope (LAT) • 20 MeV – 300 GeV • Gamma-ray Burst Monitor (GBM) • 8 keV – 30 MeV • launch June 2008 • lifetime: 5 + 5 years http://glast.gsfc.nasa.gov/public/resources/images/

3. Reconstruction LAT telescope Simulation of high-energy gamma Validation by beam test at CERN in 2006 on 2 towers Ground event

4. LAT performance • 20 MeV to 300 GeV, sensitivity > 25 x EGRET • 3.2° to 9’ resolution > GeV, 5 ≤ dE/E ≤ 10 % • 2.5 sr, 3/4 sky per orbit, slewing => all sky every 3 h LAT 1 year EGRET

5. the LAT sky > 100 MeV, 1 yr sensitivity x25 localization x10 field x4 > 2000 AGN blazars and radiogal = f(θ,z) evolution z ≤ 5 Sgr A* > 40 pulsars magnetosphere physics pulsar wind nebulae γ-ray binaries pulsar winds µ-qso jets 102 GRB /year GeV afterglow dark matter neutralino lines dark gas cosmic rays acceleration in supernova remnants OB associations, SNOBs propagation (MWay, M31, LMC, SMC) interstellar mass tracers in galaxies hopes starburst galaxies galaxy clusters unIDs

6. FSRQ radio γ-ray blazars • EGRET • 46 FSRQ + 14 Bl Lac • (to be revised) • to z = 4.5 and 5.5 • TeV • 20 sources, z < 0.2 • to Eγ > 30 TeV • + M87 radiogalaxy FSRQ EGRET Sowards-Emmerd et al. ’04 Dermer ‘07

7. γ-ray blazars • LAT • ~ 2000 blazar detections • deep all-sky survey • z ≤ 5 because of Doppler amplification Dermer ’07

8. synchrotron & IC accretion rate ↓ ? Donato ’01

9. variability: multi-λ campaigns

10. γ-ray pulsars: from 6 to tens • ~ 220 radio and X-ray pulsars monitored for ephemerides • Parkes, Jodrell, Greenbank, Nancay, RXTE, XMM ... coord: David Smith • Look for new Gemingas • Search for periodicities in time differences. Atwood et al ‘06 • Extend the relations between: • γ-ray luminosity and spindown power • spectral hardening and age • Look for Pulsar Wind Nebulae: • more difficult than at TeV

11. E>100 MeV E>100 MeV E>100 MeV 55 day simulation M. Razzano LAT team E>100 MeV E>200 MeV E>300 MeV

12. Β e± e± e± E//=0 e± PFF slot gap E// e± polar cap / slot gap / outer gap • population studies • (l,b) distribution • spectra • lightcurve shapes γ+X→ e± γ+B→ e±

13. RX J1713.7-3946 Hadronic and leptonic models for TeV emission predict very different GeV flux Brightest TeVsupernova remnant HESS + X-ray contours

14. GLAST launch and early operations Launch date now early June, after shuttle launch on May 31 • Early operations: • Two weeks turn-on and checkout • Two weeks calibration runs • « First light » (short survey mode) after one month (early July) • Pointed and survey mode tuning for one month • Start year 1 science operations after two months (survey mode with occasional repoints for GRBs or ToOs)

15. GLAST LAT data • to be delivered readily: • γ-ray bursts, bright transients • lightcurves of useful variable sources • after 6 months: • simple conservative 3-months source list for supporting 2nd AO • analysis software suite • after 1 year: • calibrated data, skymaps • interstellar model • full source catalogue (1+2+5 yr)

16. Stay tuned in early June !