message: add the pt reweight spectrum
diff: @@ -475,6 +475,7 @@ class AliReducedVarManager : public TObject {
  // Common pair/track variables
  kPt=kNEventVars,
  kPtMC,
  + kPt_weight,
  kPtMCfromLegs, // MC truth pt computed using the decay leg kinematics
  kP,
  kPMC,
  @@ -842,6 +843,8 @@ class AliReducedVarManager : public TObject {
  static void SetRecenterTPCqVector(Bool_t option);
  static void SetEventResolution(Bool_t option);
  static Int_t GetCorrectedMultiplicity( Int_t estimator = kMultiplicity, Int_t correction = 0, Int_t reference = 0, Int_t smearing = 0 );
  + static void Set_pT_re_weight(TH1F *pT_centrality_0_10);
  + static Double_t calculate_weight_factor(Double_t Mcpt, Double_t Centrality);
  private:
  static Int_t fgCurrentRunNumber; // current run number
  @@ -910,6 +913,7 @@ class AliReducedVarManager : public TObject {
  static Bool_t fgOptionRecenterVZEROqVec; //option to do Q vector recentering for V0
  static Bool_t fgOptionRecenterTPCqVec; //option to do Q vector recentering for TPC
  static Bool_t fgOptionEventRes; //option to divide by resolution
  + static TH1F* fgpT_reweight_centrality_0_10; // ratio between nature pt shape and gernareted pT shape
  AliReducedVarManager(AliReducedVarManager const&);
  AliReducedVarManager& operator=(AliReducedVarManager const&);
  