1. Neutrino Point Source Searches with AMANDA-II m-DAQ
Jim Braun

2. m-DAQ Point Source Searches
Y.-R. Wang: Phys.Rev.D71:
2000
2001
2002
2003
2004
2005
2006
D. Steele: Phys.Rev.Lett.92:
M. Ackermann: Phys.Rev.D75:
Unblinded in 2007 by J. Braun
AMANDA-II complete
m-DAQ decommissioned
Would like to combine all years into a reasonably unified final event sample and publish point source result in early 2008
Sample will also be used by John K. and others

3. Data Filtering Two main data sets:
: Filtered to L3 (~1G events  ~1M events) with Zeuthen scheme
: Filtered to L3 with UW scheme
Zeuthen and UW filtering very similar
Do not need to refilter to achieve a reasonably uniform event sample

4. Final Event Sample Final event samples are significantly different!
Zuethen
Strong likelihood difference cut (downgoing vs. unconstrained)
Strong P_hit smoothness cut
Strong paraboloid error cut
~1K events/year
High Purity UW
Weaker likelihood difference cut at horizon
Weaker P_hit smoothness cut
Strong paraboloid error cut
Weak direct length cut
Maximum sensitivity near horizon

5. Event Selection Choose Zeuthen cuts for final event sample
Need a uniform event selection for all years
Non-uniform selection is confusing
Non-uniform selection would tend to combine the undesirable properties of both selections
Choose Zeuthen cuts for final event sample
Match publication
91% of events from with Zeuthen cuts are already contained in UW sample

6. Final Event Sample
6166 Total events in final sample

7. Normalization
Data normalized to average of Barr et al. and Honda 2006 model atmospheric neutrino predictions
Corrects for uncertainties in MC
(e.g. ice properties, OM sensitivity)
Final normalization: 0.901
 Ratio of starting/final normalization indicates sample is 97% pure

8. Final Sample

9. Final Sample