1. 2005 Unbinned Neutrino Point Source Search with AMANDA-II
Jim Braun
IceCube Spring 2007 Collaboration Meeting

2. Resources Unblinding Request 2005 Filtering
Currently circulating in ps-wg
2005 Filtering

3. 2005 AMANDA m-DAQ Data 2005 very similar to 2004 2005 L3 Filtering
Zenith[JAMS] > 70 L2
Zenith[DW] > 80 L3
Zenith[32 Iter. SPE]* > 80
*WIMP stream events allowed
into L3 if reconstructed Zenith>80
 2005: 5.2M L3 Events
(2004: 2.1M L3 Events)
Otherwise
2005 very similar to 2004

4. 2005 Final Cuts Normalization 0.82 889 Events (Zenith > 100)
Optimized for minimum MRF in the binned search
Cuts similar to Zeuthen 00-04
DJKChi, Paraboloid error, S_phit, Ldirb
Normalization 0.82
(PTD, Lipari Atm. n)
889 Events (Zenith > 100)
Live Time: d

5. Methodology Simulate E-2 source with F~2.5*10-7, d~42.5o, a~12h
6 events survive filtering chain and final cuts
3.3s
>5s

6. Utilizing Event Energy
Signal and Background Distribution Functions:
Minimize -Log(L) with respect to s (signal strength) and g (source spectral index)
Compute likelihood ratio of L relative to L(s=0).

7. Evaluating Significance

8. Evaluating Sensitivity

9. Randomized 2005 P-Value Skymap

10. 2005 Sensitivity

11. 2005 Discovery Potential

12. Other Benefits of Unbinned Method
Minimization of Log(L) with respect to g allows simultaneous estimation of spectral index
Simultaneously define 1s, 2s position confidence contours

13. E2 dF/dE (nm) < 3*10-8 GeV cm-2 s-1
Analysis Roadmap
ICRC
2007
2005
2006
AMANDA-B10 + AMANDA-II
Final 2006 Analysis:
E2 dF/dE (nm) < 3*10-8 GeV cm-2 s-1
Estimated Sensitivity:

14. Sensitivities

16. Bin Radius

17. Point Spread

18. 2005 Effective Area

19. Normalization