Index: trunk/MagicSoft/Mars/mhcalib/MHPedestalCam.cc
===================================================================
--- trunk/MagicSoft/Mars/mhcalib/MHPedestalCam.cc	(revision 8489)
+++ trunk/MagicSoft/Mars/mhcalib/MHPedestalCam.cc	(revision 8490)
@@ -773,8 +773,10 @@
     return kFALSE;
 
-  const Float_t ped      = (*fPedestalsOut)[idx].GetPedestal();
-  const Float_t rms      = (*fPedestalsOut)[idx].GetPedestalRms();
-
-  const Float_t entsqr    =  TMath::Sqrt((Float_t)fPedestalsOut->GetTotalEntries());
+  const MPedestalPix &ppix = (*fPedestalsOut)[idx];
+
+  const Float_t ped = ppix.GetPedestal();
+  const Float_t rms = ppix.GetPedestalRms();
+
+  const Float_t entsqr =  TMath::Sqrt((Float_t)fPedestalsOut->GetNumSlices()*ppix.GetNumEvents());
 
   const Float_t pederr   = rms/entsqr;