Index: /trunk/MagicSoft/Mars/Changelog
===================================================================
--- /trunk/MagicSoft/Mars/Changelog	(revision 2800)
+++ /trunk/MagicSoft/Mars/Changelog	(revision 2801)
@@ -4,4 +4,12 @@
 
                                                  -*-*- END OF LINE -*-*-
+
+ 2004/01/14: Abelardo Moralejo
+
+   * manalysis/MMcCalibrationCalc.cc:
+     - set pedestal rms per FADC slice to 0.01 counts in case it is 0.
+       This can happen (depending on camera simulation parameters), and
+       rms = 0 later resulted in the pixel being eliminated in the 
+       image cleaning.
 
  2004/01/14: Thomas Bretz
Index: /trunk/MagicSoft/Mars/manalysis/MMcCalibrationCalc.cc
===================================================================
--- /trunk/MagicSoft/Mars/manalysis/MMcCalibrationCalc.cc	(revision 2800)
+++ /trunk/MagicSoft/Mars/manalysis/MMcCalibrationCalc.cc	(revision 2801)
@@ -216,7 +216,14 @@
 	  fSignalCam->GetNumUsedHiGainFADCSlices()*fHeaderFadc->GetPedestal(i);
 
+	//
+	// In some cases, depending on the camera simulation parameters, one can have
+	// very little or no noise in the FADC. In the case the rms of pedestal is zero, 
+	// the pixel will be cleaned out later in the image cleaning. To avoid this problem,
+	// we set a default value of 0.01 ADC counts for the RMS per slice:
+	//
+
         const Float_t pedestrms  = sigpix.IsLoGainUsed()? 
-	  sqrt((Double_t)(fSignalCam->GetNumUsedLoGainFADCSlices())) * fHeaderFadc->GetPedestalRmsLow(i) : 
-	  sqrt((Double_t)(fSignalCam->GetNumUsedHiGainFADCSlices())) * fHeaderFadc->GetPedestalRmsHigh(i);
+	  sqrt((Double_t)(fSignalCam->GetNumUsedLoGainFADCSlices())) * TMath::Max(0.01, fHeaderFadc->GetPedestalRmsLow(i)) : 
+	  sqrt((Double_t)(fSignalCam->GetNumUsedHiGainFADCSlices())) * TMath::Max(0.01, fHeaderFadc->GetPedestalRmsHigh(i));
 
         calpix.SetPedestal(pedestmean, pedestrms);