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GLAST LAT Project SLAC Jan. 12, 2004 Hammer-Aitoff map.

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Presentation on theme: "GLAST LAT Project SLAC Jan. 12, 2004 Hammer-Aitoff map."— Presentation transcript:

1 GLAST LAT Project SLAC Jan. 12, 2004 Hammer-Aitoff map

2 GLAST LAT Project SLAC Jan. 12, 2004 GRBs

3 GLAST LAT Project SLAC Jan. 12, 2004 Galactic Center Energy (MeV) Counts Something is going on there! Wimps

4 GLAST LAT Project SLAC Jan. 12, 2004

5 3C2733C279 This one is off!

6 GLAST LAT Project SLAC Jan. 12, 2004 CrabExtragalactic Diffuse Emission Galactic Diffuse emission GemingaPKS0528p134 0.02197.79e-059.010.0400.010618 2.223.472.281.632.16 0.1421.181609220.19870.100 2.282.012.282.102.26 226--35294 2.19--1.662.46 Egret Flux (10 -8 cm -2 s -1 ) Egret Index TsMap for the anticenter region “ Tutorial ” DC1 Flux Index Anticenter region Optimizer:drmngb

7 GLAST LAT Project SLAC Jan. 12, 2004 GRB1 GRB2 GRB3 3C273 3EGJ0210-5055 3EGJ1635+38133EGJ0237+1635 3EGJ0241+6103 3EGJ1835+5918 3EGJ2243+1509 Vela Geminga Crab 3EGJ1027-5817 3EGJ1746+2851 Ra (deg.) Dec (deg.)

8 GLAST LAT Project SLAC Jan. 12, 2004 1.84 118.8 2.73 2.27 0.058 0.037 3EGJ0340 -0201 1.99 85.5 2.21 2.46 0.091 0.141 3EGJ0210 -5055 2.21 2.151.85- 69.3107.565.173.1 1.96 2.10 2.38 2.39 - 2.33 2.05 2.10 0.107 0.135 0.146 0.049 - 0.055 0.106 0.110 3EGJ0241 +6103 3EGJ1635 +3813 3EGJ0237 +1635 3EGJ2243 +1509 Drmngb return code: 4 = RELATIVE FUNCTION CONVERGENCE Prefactor always winds up close to initial value with drmngb ?! Convergence? Minuit seems to work better! Flux (drmngb) Flux (minuit) Egret Flux (10 -8 cm -2 s -1 ) Index (drmngb) Index (minuit) Egret Index 2.03 0.138 3EGJ1746 -2851 2.22 0.017 PKS2155-304 2.341.892.20 0.0140.0240.375 Mrk501Mrk421Vela 3EGJ1835 -5918 1.90 0.033 Flux (minuit) Index ( minuit) 835 1.69 13.9 1.57 - - 30.4 2.35 Egret Flux (10 -8 cm -2 s -1 ) Egret Index 119.9 1.70 60.6 1.69 Likelihood results

9 GLAST LAT Project SLAC Jan. 12, 2004 On a given day, what sources are active? A rough estimate of the flux of the bright known transient sources (AGNs) would be useful (DC2 and later). One needs to visually check the quality of the fit provided by the likelihood tool. The latter is not yet foolproof. Some problems with the DRMNGB optimizer and TsMap (crashes). Pointing history in the root Ntuple will be useful to produce “normalized” fluxes with root.

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