GLASTObservatoryLarge Area Telescope (LAT)20 MeV 300 GeVGamma-ray Burst Monitor (GBM)8 keV 30 MeV

launch June 2008 lifetime: 5 + 5 years

http://glast.gsfc.nasa.gov/public/resources/images/

LAT telescopeGround eventSimulation of high-energy gammaValidation by beam test at CERN in 2006 on 2 towersReconstruction

GLAST comparable to ACTs, 1 year all-sky vs a few days in a small fieldhttp://www-glast.slac.stanford.edu/software/IS/glast_lat_performance.htmSensitivity

LAT performance20 MeV to 300 GeV, sensitivity > 25 x EGRET3.2 to 9 resolution > GeV, 5 dE/E 10 %2.5 sr, 3/4 sky per orbit, slewing => all sky every 3 hEGRETLAT 1 year

the LAT sky> 100 MeV, 1 yrsensitivity x25localization x10field x4-raybinariespulsar winds-qso jets> 2000 AGNblazars and radiogal = f(,z)evolution z 5Sgr A*102 GRB /yearGeV afterglowdark matterneutralino linesdark gas> 40 pulsarsmagnetosphere physicspulsar wind nebulaecosmic raysacceleration in supernova remnantsOB associations, SNOBspropagation (MWay, M31, LMC, SMC)interstellar mass tracers in galaxieshopesstarburst galaxiesgalaxy clustersunIDs

-ray blazarsEGRET46 FSRQ + 14 Bl Lac (to be revised)to z = 4.5 and 5.5TeV20 sources, z < 0.2to E > 30 TeV+ M87 radiogalaxySowards-Emmerd et al. 04Dermer 07FSRQ EGRET

-ray blazarsLAT~ 2000 blazar detectionsdeep all-sky surveyz 5 because of Doppler amplificationDermer 07

synchrotron & ICaccretion rate ?Donato 01

variability: multi- campaigns

-ray pulsars: from 6 to tens~ 220 radio and X-ray pulsars monitored for ephemeridesParkes, Jodrell, Greenbank, Nancay, RXTE, XMM ... coord: David SmithLook for new GemingasSearch for periodicities in time differences. Atwood et al 06Extend the relations between:-ray luminosity and spindown powerspectral hardening and ageLook for Pulsar Wind Nebulae:more difficult than at TeV

55 daysimulationE>200 MeVE>100 MeVE>100 MeVE>100 MeVE>100 MeVE>300 MeVM. RazzanoLAT team

polar cap / slot gap / outer gappopulation studies(l,b) distributionspectralightcurve shapes+B e+X e

RX J1713.7-3946HESS + X-ray contoursBrightest TeV supernova remnantHadronic and leptonic models for TeV emission predict very different GeV flux

confused unIDs

GLAST launch and early operationsLaunch date now early June, after shuttle launch on May 31Early operations:Two weeks turn-on and checkoutTwo weeks calibration runsFirst light (short survey mode) after one month (early July)Pointed and survey mode tuning for one monthStart year 1 science operations after two months (survey mode with occasional repoints for GRBs or ToOs)

GLAST LAT datato be delivered readily:-ray bursts, bright transientslightcurves of useful variable sources

after 6 months:simple conservative 3-months source list for supporting 2nd AOanalysis software suite

after 1 year:calibrated data, skymapsinterstellar modelfull source catalogue (1+2+5 yr)

Stay tuned in early June !