+ Bool_t fComputeMultiplicity; // flag to switch on/off tracklet calculation
+ Bool_t fUseModule[kNSPDMod]; // flag for enabling/disabling SPD modules
+ AliITSDetTypeRec *fDetTypeRec; //! pointer to DetTypeRec
+ Int_t fMinTrackletsForPilup; // min. n. of tracklets for pilup definition
+ Bool_t fIsPileup; // flag for pileup
+ Int_t fNTrpuv; // tracklets in pile-up vertex
+ Float_t fZpuv; // Z of second pile-up vertex
+ Int_t fNoVertices; //! number of vertices found
+ AliESDVertex* fVertArray; //! vertices (main+pileupped)
+