calibration for coming collisions

diff --git a/T0/AliT0Calibrator.cxx b/T0/AliT0Calibrator.cxx
index b8e1b78dcee989e00adb2150c36ae0fc8b03789a..2b12c6f7db83efe1276857dbc1c0f8d304de4536 100644 (file)
--- a/T0/AliT0Calibrator.cxx
+++ b/T0/AliT0Calibrator.cxx
@@ -107,10 +107,10 @@ Int_t  AliT0Calibrator::WalkCorrection(Int_t refAmp,  Int_t ipmt, Int_t qt, Int_
     grY = fu1->GetY();
     fMaxValue[ipmt]=grY[refAmp-1];
     //    TGraph* fu  = param ->GetAmpLEDRec(i);
-    walk = Int_t (fMaxValue[ipmt]) - Int_t(fu1->Eval(Double_t(qt)));
+    walk = Int_t (fMaxValue[ipmt]) + Int_t(fu1->Eval(Double_t(qt)));
   }
   
-  timeWalk = time + walk   ;
+  timeWalk = time - walk   ;
   timeEq= timeWalk - fTimeDelayCFD[ipmt];
   AliDebug(10,Form(" ipmt %i time before %i timeWalk %i , walk %i  qt %i timeEq %i \n ",
                   ipmt, time,timeWalk, walk, qt, timeEq ));