diff --git a/dataClasses/AEvent.cpp b/dataClasses/AEvent.cpp
index 2d97aa58938625f5ab45379335815384484af331..972e6100ff2f648559d3ed44c352d1f03328a0a2 100644
--- a/dataClasses/AEvent.cpp
+++ b/dataClasses/AEvent.cpp
@@ -81,6 +81,7 @@ void AEvent::Reset() {
 	}
 
 	fEdgeSlope=0.;
+	fEdgeXi=0.;
 	fEdgeSlope=-100.;
 	fTime10=0.;
 	fTime90=0.;
@@ -212,6 +213,7 @@ void AEvent::FindFrontProperties() {
 //	fGraphSignal->Fit(fit1,"RQ","goff");
 	fGraphSignal->Fit(fit1,"RQN","goff");
 	fEdgeSlope = fit1->GetParameter(1);
+	fEdgeXi = fit1->GetChisquare();
 
 	delete fit1;
 }
@@ -279,6 +281,10 @@ Double_t AEvent::GetEdgeSlope() {
 		return fEdgeSlope;
 }
 
+Double_t AEvent::GetEdgeXi() {
+		return fEdgeXi;
+}
+
 void AEvent::SetMaxAmplitudes() {
 	Double_t maxAmp = 0.;
 	Double_t maxAmpT = 0.;
diff --git a/dataClasses/AEvent.h b/dataClasses/AEvent.h
index e6d996cb3fab4123fb13825228c20b0510520566..a3ead24a132478add8c8cecc19c72855ae3c64ea 100644
--- a/dataClasses/AEvent.h
+++ b/dataClasses/AEvent.h
@@ -39,6 +39,7 @@ private:
 	Double_t fAmpMax;
 	Double_t fTimeAmpMax;
 	Double_t fZeroLevel;
+	Double_t fEdgeXi;
 	Double_t fEdgeSlope;	//slope coefficient for the rising edge of the signal
 	Double_t fTime10;		//time of 10% of rising edge amplitude in ns
 	Double_t fTime90;		//time of 10% of rising edge amplitude in ns
@@ -73,6 +74,8 @@ public:
 	Double_t GetEdgeSlope();
 	//returns slope coefficient for the rising edge of the signal
 
+	Double_t GetEdgeXi();
+
 	Double_t GetfCFD();
 	Double_t GetOnefTime(Int_t i);
 	Double_t GetOnefAmpPos(Int_t i);
diff --git a/macros/histCorr.C b/macros/histCorr.C
index 27fd1e8455738f3b0db237ee84c141406d83ef01..4c900e3b47625872c30def1bcbc2358fd35c5f7f 100644
--- a/macros/histCorr.C
+++ b/macros/histCorr.C
@@ -1,10 +1,10 @@
 //#include "TCanvas.h"
 
-void histCorr(const Bool_t can1 = 1, const Bool_t can2 = 1, const Bool_t can3 = 1)
+void histCorr(const Bool_t can1 = 0, const Bool_t can2 = 0, const Bool_t can3 = 0, const Bool_t can4 = 1)
 {
 	gSystem->Load("../libData.so");
 //	TFile *f = new TFile("../data/dataDSR4/analysis_07_8.root");
-	TFile *f = new TFile("../data/dataDSR4/analysis_08_2.root");
+	TFile *f = new TFile("../data/dataDSR4/test18.root");
 	TTree *t = (TTree*)f->Get("atree");
 
 	if (can1) {
@@ -96,7 +96,8 @@ void histCorr(const Bool_t can1 = 1, const Bool_t can2 = 1, const Bool_t can3 =
 		TH2F *h9 = new TH2F("h9", "Time difference between 90 and 10: ch0 vs ch1", 100, 0., 5., 100, 0., 5.);
 
 		c3->cd(1);
-		t->Draw("Ach0.fTime90 - Ach0.fTime10 >> h7","(Ach0.fTime90-Ach0.fTime10)>=0","col");
+		t->Draw("Ach1.fTime90 - Ach1.fTime10 >> h7","((Ach1.fTime90-Ach1.fTime10)>=0)","col");
+		t->Draw("Ach1.fTime90 - Ach1.fTime10 >> h7","((Ach1.fTime90-Ach1.fTime10)>=0) && (Ach1.fEdgeXi < 0.0015)","col");
 //		t->Draw("Ach0.fTime90 - Ach0.fTime10 >> h7","","col");
 		//x
 		h7->GetXaxis()->SetTitle("\\Delta \\tau_{0}^{(rise)} [ns]");
@@ -104,7 +105,7 @@ void histCorr(const Bool_t can1 = 1, const Bool_t can2 = 1, const Bool_t can3 =
 		c3->Update();
 
 		c3->cd(3);
-		t->Draw("  Ach0.fChargeCFD : (Ach0.fTime90 - Ach0.fTime10) >> h8","(Ach0.fTime90 - Ach0.fTime10)>0","col");
+		t->Draw("  Ach1.fChargeCFD : (Ach1.fTime90 - Ach1.fTime10) >> h8","(Ach1.fTime90 - Ach1.fTime10)>0","col");
 		//x
 		h8->GetXaxis()->SetTitle("\\Delta \\tau_{0}^{(rise)} [ns]");
 		h8->GetXaxis()->CenterTitle();
@@ -114,7 +115,7 @@ void histCorr(const Bool_t can1 = 1, const Bool_t can2 = 1, const Bool_t can3 =
 		c3->Update();
 	
 		c3->cd(2);
-		t->Draw("  (Ach1.fTime90 - Ach1.fTime10) : (Ach0.fTime90 - Ach0.fTime10) >> h9","(Ach0.fTime90 - Ach0.fTime10)>0","col");
+		t->Draw("  (Ach1.fTime90 - Ach1.fTime10) : (Ach1.fTime90 - Ach1.fTime10) >> h9","(Ach1.fTime90 - Ach1.fTime10)>0","col");
 		//x
 		h9->GetXaxis()->SetTitle("\\Delta \\tau_{0}^{(rise)} [ns]");
 		h9->GetXaxis()->CenterTitle();
@@ -122,6 +123,28 @@ void histCorr(const Bool_t can1 = 1, const Bool_t can2 = 1, const Bool_t can3 =
 		h9->GetYaxis()->SetTitle("\\Delta \\tau_{1}^{(rise)} [ns]");
 		h9->GetYaxis()->CenterTitle();
 		c3->Update();
+
+		c3->cd(4);
+		t->Draw("Ach1.fTime90 - Ach1.fTime10","((Ach1.fTime90-Ach1.fTime10)>=0)","col");
+		t->SetLineColor(kRed);
+		t->Draw("Ach1.fTime90 - Ach1.fTime10","((Ach1.fTime90-Ach1.fTime10)>=0) && (Ach1.fEdgeXi < 0.0005)","same");
+		c3->Update();
+
 	}
 
+if (can4) {
+		TCanvas *c4 = new TCanvas("c4", "Correlation pictures: rising edge times");
+
+		TH2F *h10 = new TH2F("h10", "Time difference between two channels vs XiSquare of edge",100, -0., 5., 100, 0., 0.005);
+
+		t->Draw("Ach1.fEdgeXi : (Ach1.fTime90 - Ach1.fTime10) >> h10","(Ach1.fTime90 - Ach1.fTime10)>0","col");
+		//x
+		h10->GetXaxis()->SetTitle("\\Delta \\tau_{0}^{(rise)} [ns]");
+		h10->GetXaxis()->CenterTitle();
+		//y
+		h10->GetYaxis()->SetTitle("fEdgeXi");
+		h10->GetYaxis()->CenterTitle();
+		c4->Update();
+}
+
 }
diff --git a/macros/testShowGraphs.cxx b/macros/testShowGraphs.cxx
index c0ca2a46bf69539c60a689d1339334ca9e20610f..af320168f569eb9a8f9ca6637da1056823582c48 100644
--- a/macros/testShowGraphs.cxx
+++ b/macros/testShowGraphs.cxx
@@ -7,7 +7,7 @@ void testShowGraphs()
 
 //	TFile fr("../data/dataDSR4/analysis_07_1.root");
 //	TFile fr("../data/dataDSR4/analysis_07_8.root");
-	TFile fr("../data/dataDSR4/analysis_08_2.root");
+	TFile fr("../data/dataTektronix/exp18.root");
 //	TFile fr("../data/dataTektronix/analysisExp7.root");
 	TTree *tr = (TTree*)fr.Get("atree");