class AliAnalysisTaskPi0Flow: public AliAnalysisTaskSE

 Create histograms
 Called once

empty, MC extensions should override

 Main loop, called for each event
 Analyze ESD/AOD

 Define centrality bins by their edges

Check if this channel belogs to the good ones

 Fill cell occupancy per module

 clear (or create) array for holding events photons/clusters

Now we either add current events to stack or remove
If no photons in current event - no need to add it to mixed

FillHistogram

FillHistogram

Fills 1D histograms with key

Fills 1D histograms with key

 fCentBin=1+Int_t(centralityV0M/100. *kNCenBins) ;
  if(centralityV0M < 5. || fCentBin < 0)
   fCentBin=0 ;
  if(fCentBin > kNCenBins-1)
    fCentBin = kNCenBins-1 ;

 if(fDebug > 1) {
   AliInfo(Form("step %d completed", step));
 }
 the +0.5 is not realy neccisarry, but oh well... -henrik

Parameterization of LHC10h period
_true if neutral_

Read objects with flattening parameters

calculate energy of the cluster in the circle with radius distanceCut around the maximum

 return true if absId are "Neighbors" (adjacent, including diagornaly,)
 false if not.

Re-clusterize to make continues cluster

 sets the misalignment vertex if ESD

 assigns: fMultV0, fV0Cpol, fV0Apol, fMeanQ, and fWidthQ

 Initialize the PHOS geometry

 assigns: fHaveTPCRP and fRP
 also does a few histogram fills

 set: fRPV0A and fRPV0C

calculate dispecrsion of the cluster in the circle with radius distanceCut around the maximum

Evaluates if lambdas correspond to photon cluster
Tuned using pp date
For core radius R=4.5

virtual void   Terminate(Option_t *);

Where to read AODB object with EP calibration if not default