void lowT() {
  gROOT->SetStyle("Plain");

  TCanvas *c1=new TCanvas("c1","Canvas",800,600);
  gStyle->SetOptStat(0);

  TFile *f[4];
  f[0]=TFile::Open("S44_030mV.root");
  f[1]=TFile::Open("S36_030mV.root");
  f[2]=TFile::Open("S42_030mV.root");
  f[3]=TFile::Open("S23_030mV.root");

  for(unsigned i(0);i<4;i++) {
    f[i]->cd();

    PeakSignal->SetTitle(";Peak signal (mV);Number of events/mV");
    if(i==0) PeakSignal->GetXaxis()->SetRangeUser(70,169);
    if(i==1) PeakSignal->GetXaxis()->SetRangeUser(60,159);
    if(i==2) PeakSignal->GetXaxis()->SetRangeUser(60,159);
    if(i==3) PeakSignal->GetXaxis()->SetRangeUser(50,149);
    //PeakSignal->SetLineColor(2);
    PeakSignal->SetLineWidth(2);
    PeakSignal->GetYaxis()->SetTitleOffset(1.2);
    PeakSignal->Draw();

    /*    
    if(i==0) f1->cd();
    if(i==1) f2->cd();
    if(i==2) f3->cd();
    TH1F *h=PeakSignal;
    double factor=1.6;
    for(int j=0;j<300;j++) {
      h->SetBinContent(j+1,factor*h->GetBinContent(j+1));
      //h->SetBinError(j+1,factor*h->GetBinError(j+1));
    }
    
    PeakSignal->SetLineStyle(2);
    PeakSignal->SetLineColor(4);
    PeakSignal->SetLineWidth(2);
    PeakSignal->Draw("same");
    */    
    TLatex t;
    t.SetTextSize(0.04);  
    //t.SetTextColor(2);
    if(i==0) t.DrawLatex(144,420,"Deep P-well");
    if(i==1) t.DrawLatex(144,420,"Without deep P-well");
    if(i==2) t.DrawLatex(144,420,"12{#mu}m hi-res");
    if(i==3) t.DrawLatex(144,420,"18{#mu}m hi-res");
    /*
    t.SetTextColor(4);
    if(i==0) t.DrawLatex(244,380,"Without deep P-well");
    if(i==1) t.DrawLatex(244,380,"With hi-res");
    if(i==2) t.DrawLatex(244,380,"18#mu m hi-res");
    */
    
    c1->Update();
    if(i==0) c1->Print("../lowT0.png");
    if(i==1) c1->Print("../lowT1.png");
    if(i==2) c1->Print("../lowT2.png");
    if(i==3) c1->Print("../lowT3.png");
  }
}