1. HAWC Sensitivity Andrew Smith April 20-21,2007 Collaboration Meeting

2. Sensitivity with vs trigger threshold. No gamma/hadron separation

3. Sensitivity after gamma/hadron separation. Require at least 20 bkg events passing cuts.

4. nTop/cxPE distributions for various thresholds

5. Sensitivity after g/h separation. Based on extrapolation of fits to the bkg. Require >30% of gammas pass. No nTop/cxPE cuts>12. G/h separation breaks down for large events.

6. Relative sensitivity (compared to Milagro at 22 o ) as a function of source transit angle.

7. Sensitivity of HAWC: Integral sensitivity for Crab spectrum.

8. Do same analysis with slices in nTop instead of >trigger threshold. Combining slices in quadrature --> 117  /year

9. Effect of Elevation Raises threshold -> Changes Physics ~5x less EM energy at Milagro elevation compared to 4100m -> ~sqrt(5) lower sensitivity Using a 100 PMT trigger compare sensitivity: Eff of background is ~2x better at lower elev. Reletive sensitivity ~1.6

10. Effect of Curtains