Index: trunk/MagicSoft/Mars/mhvstime/MHPixVsTime.cc
===================================================================
--- trunk/MagicSoft/Mars/mhvstime/MHPixVsTime.cc	(revision 5756)
+++ trunk/MagicSoft/Mars/mhvstime/MHPixVsTime.cc	(revision 6977)
@@ -206,5 +206,5 @@
 // Return histogram of TGraph
 //
-TH1 *MHPixVsTime::GetHistByName(const TString name)
+TH1 *MHPixVsTime::GetHistByName(const TString name) const
 {
     return fGraph->GetHistogram();
Index: trunk/MagicSoft/Mars/mhvstime/MHPixVsTime.h
===================================================================
--- trunk/MagicSoft/Mars/mhvstime/MHPixVsTime.h	(revision 5756)
+++ trunk/MagicSoft/Mars/mhvstime/MHPixVsTime.h	(revision 6977)
@@ -52,5 +52,5 @@
     void SetTitle(const char *title);
 
-    TH1 *GetHistByName(const TString name="");
+    TH1 *GetHistByName(const TString name="") const;
     TGraph *GetGraph() { return fGraph; }
 
Index: trunk/MagicSoft/Mars/mhvstime/MHSectorVsTime.cc
===================================================================
--- trunk/MagicSoft/Mars/mhvstime/MHSectorVsTime.cc	(revision 5756)
+++ trunk/MagicSoft/Mars/mhvstime/MHSectorVsTime.cc	(revision 6977)
@@ -231,5 +231,5 @@
 // Return fHistogram from TGraph
 //
-TH1 *MHSectorVsTime::GetHistByName(const TString name)
+TH1 *MHSectorVsTime::GetHistByName(const TString name) const
 {
     return fGraph->GetHistogram();
Index: trunk/MagicSoft/Mars/mhvstime/MHSectorVsTime.h
===================================================================
--- trunk/MagicSoft/Mars/mhvstime/MHSectorVsTime.h	(revision 5756)
+++ trunk/MagicSoft/Mars/mhvstime/MHSectorVsTime.h	(revision 6977)
@@ -64,5 +64,5 @@
     void SetAreaIndex(const TArrayI &a)  { fAreaIndex=a; }
 
-    TH1 *GetHistByName(const TString name="");
+    TH1 *GetHistByName(const TString name="") const;
     //TGraph *GetGraph() { return fGraph; }