1. C&A 1 May 06 1 Point Source Detection and Localization Update Using the UW HealPixel database on DC2_2 data Toby Burnett University of Washington

2. C&A 1 May 06 2 Procedure Create compact tuple with (ra, dec, energy, event_class) from 55 days. Create Healpixel array with 8 levels (6-13) depending on energy; fill with classA Front only for now –Generate density plots of full sky (AIT), or small regions (ZEA) –Use current catalog list to apply simple maximum likelihood background/signal fits independently to each energy band –If  (TS)>2, adjust position to maximize total likelihood Results are at http://glast.phys.washington.edu/dc2/point/likelihood.htm, tab “catalog-v1r2-DC2-2”: 350 fits, ~30 problems http://glast.phys.washington.edu/dc2/point/likelihood.htm Sort according to position resolution, from 0.0011 to 0.4 deg –Also use for source finding

3. C&A 1 May 06 3 DC2_2 photon density Vela region

4. C&A 1 May 06 4 Around Vela: two very hard pulsars, another hard unknown source Vela 0.0023  (empty for test) MRF0141_v1r2 0.0031  PSR_J0717m1235 0.0016  PSR_J0904m5008 0.0011 

5. C&A 1 May 06 5 Analysis Details, questions See http://glast.phys.washington.edu/dc2/point/li kelihood.htm, tab “Hard PSR” http://glast.phys.washington.edu/dc2/point/li kelihood.htm Would EGRET have seen these sources? Sensitivity? EGRET Astron. Astrophys. 289, 855-867 (1994) Note: EGRET total is 6852 events mostly from 3 weeks of pointed observations during first year scan. The DC2 55-day scan yields 7871 (front only). From the same EGRET paper: “Strong sources can be located to an accuracy of about 0.1  ”.