More checks on selection

1
More checks on selection

• Reference docs (Atwood)
• Instrument response studies
• Post rome background rejection
• Datasets
• DC1 prep background ntuples
• DC1 prep gamma Merit nutple
• Divide events in particle type gamma(signal),
  gamma(bkg), electronpositron, protons

2
Calorimeter categories

• Definitions
• No cal CalEnergySumlt5.
  CalTotRLn2
• Low Cal CalEnergySumgt5. CalTotRLngt2
• Med Cal CalEnergySumgt350. CalTotRLngt2
• High Cal CalEnergySumlt3500. CalTotRLngt2
• Good Energy events
• good_energy EvtEnergySumOpt-MCEnergy)/MCEnergy
  
• good_energy 35

3
Signal events split
4
Good Energy distribution (g)
5
Gamma
Low Cal
BAD
GOOD
ALL
Sigma(good ene)
High Cal
BAD
GOOD
ALL
MCEnergy
6
Background events split
7
Good energy distribution - background
8
Background all
Low Cal
GOOD
BAD
ALL
Sigma(good ene)
High Cal
ALL
GOOD
BAD
MCEnergy
9
Background gamma
Low Cal
GOOD
ALL
BAD
Sigma(good ene)
High Cal
GOOD
ALL
BAD
MCEnergy
10
Background electrons
Low Cal
ALL
GOOD
BAD
Sigma(good ene)
High Cal
GOOD
ALL
BAD
MCEnergy
11
Background protons
Low Cal
GOOD
ALL
BAD
Sigma(good ene)
High Cal
ALL
GOOD
BAD
MCEnergy
12
Signal events split (after veto)
13
Background (after simple VETO)
14
Stuff from Riccardo after this

• A few comments
• the split in calorimeter cathegories has to be
  the same between Riccardo and Pat
• The number of events after the simple veto has to
  be the same as well since it is a simple straight
  cut also
• Pat numbers have (slightly) changed since Friday
  b/c she was using a slightly different veto and
  for the comparison here has moved to the same
  definition as Rick
• The numbers after the Good energy requirement
  can be different since Pat use straight cuts and
  Riccardo uses CT
• The logic in the tables should be now consistent
• But I do not understand yet some of the fractions
  calculated by rick for the background
• More info at http//sirad.pd.infn.it/glast/ground
  _sw/dc2.html

15
CT approach
ID
predicate
ID
predicate
0/1
16
Signal events split
17
Good Cal E
18
Simple veto, from merit doxygen
19
Good Cal E after veto
20
Good Cal E (signal Gamma)
21
Good Cal E Background (Protons)
22
Good Cal E background (ele)
23
Good Cal E background (gamma)