Lehman1_Ritz_Instrument
CAL(U.S.A., France, Sweden):
Hodoscopic array of 1536 CsI(Tl) scintillators (8 layers in each tower)
Shower
18 X-Y tracking planes,
228um pitch, 8x105 channels
background
self-veto
LAT: Large Area Telescope
100 sec
1 orbit
1 day
20%scanning mode(<--->pointing observation by EGRET and ACTs); burst/transient source
EGRET
LAT
validation
16 Tower ()
Environmental testing: (NRL)2006/3~
Beam Test at CERN: 2006/7~ (Calibration Unit)
Launch: 2007/9

1SSDs
Quality
(nA/cm2)
Objectives:
LAT1

AMS(380km)
e-/e+γ
2 tower
4 tower
6 tower
10 tower
16 tower
bad strips
2005/10 16Tower(@SLAC)
Plot by T. Kawamoto (Hiroshima Univ.)
Page Number

(~8000 cm-2)
Cygnus
Region
3C279
Geminga
Vela
GLAST()
Page Number
Page Number
galactic center region (1msr)
extra galactic diffuse (1msr)
(Kamae et al. 2005, Proc. of International Symposium of High Energy Gamma-ray Astronomy, Heidelberg)
Differential Sensitivity vs. Source Fluxes
30MeV-300GeVEGRET10
Outer gap model
Polar cap model
10-4
10-6
10-8
10-10
GLAST
Sensitivity
GeVcut off
TeVγ(IC)Outer Gap Model:
Page Number
OVV QSO:
()
time lag (soft lag, hard lag)rise time(e.g., Moderski et al. 2004)
3C2791996GLAST
3C2791996
photon index
()

z=0.5
z=1
z=2
z=4
Hard
(Aharonian et al. 2005)
HESS
X
MeV/GeV
TeVγ

XTeVγ
GLAST:
non-linear theory prediction
Cluster of Galaxies: