diff --git a/NPLib/VDetector/DetectorManager.cxx b/NPLib/VDetector/DetectorManager.cxx
index 86bbd6a2ee7de4751c31069cfd276d01c1c52c66..232ffd148336e6bb4402c48faa1b6b8579c86d07 100644
--- a/NPLib/VDetector/DetectorManager.cxx
+++ b/NPLib/VDetector/DetectorManager.cxx
@@ -748,3 +748,16 @@ void DetectorManager::InitSpectra(){
     it->second->InitSpectra();
 }
 
+/////////////////////////////////////////////////////////////////////////////////////////////////   
+vector< map< vector<TString>, TH1* > > DetectorManager::GetSpectra()
+{
+   vector< map< vector<TString>, TH1* > > myVector;
+
+   map<string,VDetector*>::iterator it;
+   // loop on detectors
+   for (it = m_Detector.begin(); it != m_Detector.end(); ++it) {
+      myVector.push_back(it->second->GetSpectra());
+   }
+
+   return myVector;
+}
diff --git a/NPLib/VDetector/DetectorManager.h b/NPLib/VDetector/DetectorManager.h
index cb3d7488a3efa84441e6bdee5fffae969fbbf180..137bc7539710284710ad7fca60ad02b21ae922ef 100644
--- a/NPLib/VDetector/DetectorManager.h
+++ b/NPLib/VDetector/DetectorManager.h
@@ -23,11 +23,15 @@
 //   NPL
 #include "VDetector.h"
 
+// ROOT
+#include "TH1.h"
+#include "TString.h"
+
 //   STL
 #include <string>
 #include <map>
-
 using namespace std ;
+
 using namespace NPA ;
 
 // This class manage a map of virtual detector
@@ -49,6 +53,7 @@ namespace NPA{
       void        ClearEventPhysics();
       void        ClearEventData();
       void        InitSpectra();
+      vector< map< vector<TString>, TH1* > > GetSpectra();  
 
     private:   
       // The map containning all detectors
diff --git a/NPLib/VDetector/VDetector.h b/NPLib/VDetector/VDetector.h
index eaf1876dfc83b48efba5fd02d63541a5def8668c..6d36b74b11e354f5b1401c5e4f86d5b9bde31681 100644
--- a/NPLib/VDetector/VDetector.h
+++ b/NPLib/VDetector/VDetector.h
@@ -25,8 +25,14 @@
  *                                                                           *  
  *   Adding Fill Spectra Method to fill control Histogramm                   *
  *****************************************************************************/
+
+// ROOT headers
+#include "TH1.h"
+
 //   STL header
 #include <string>
+#include <vector>
+#include <map>
 using namespace std;
 
 namespace NPA {
@@ -76,6 +82,8 @@ namespace NPA {
       virtual void CheckSpectra() {};
       // Used for Online only, clear all the spectra hold by the Spectra class
       virtual void ClearSpectra() {};
+      // Used for Online only, get all the spectra hold by the Spectra class
+      virtual  map< vector<TString> , TH1*> GetSpectra() {map< vector<TString>, TH1* > x; return x;};
 
     private:   //   The list below is here to help you building your own detector
       /*