void pretty_plot_2g_bcal(){ 
  gStyle->SetPadBottomMargin(0.15);
  gStyle->SetPadLeftMargin(0.2);
  gStyle->SetPadRightMargin(0.05);
  TCanvas *c1=new TCanvas("c1","c1",900,800);
  c1->cd();
  TH1D *h1=(TH1D*)BCAL2GammaMassVsE_v2->ProjectionY("h1",11,30);
  h1->GetXaxis()->SetRangeUser(0.,0.3);
  h1->SetFillColor(5);
  TF1 *f1=new TF1("f1","gaus(0)+gaus(3)+pol2(6)",0.02,0.3);
  f1->SetParameters(18000,0.135,0.01,2000,0.135,0.02,100.);
  h1->Fit("f1","r");
  h1->SetXTitle("M_{#gamma#gamma} [GeV/c^{2}]");
  h1->GetXaxis()->SetLabelSize(0.045);
  h1->GetXaxis()->SetTitleSize(0.055);
  h1->SetYTitle("Candidates / 2 MeV/c^{2}");  
  h1->GetYaxis()->SetLabelSize(0.045);
  h1->GetYaxis()->SetTitleSize(0.055);
  h1->GetYaxis()->SetTitleOffset(1.75);
  h1->SetTitle("Barrel Lead-Scintillating Fiber Calorimeter");
  h1->Draw("hist");
  h1->Draw("same");
  TLatex lat1;
  lat1.SetTextSize(0.045);
  lat1.DrawLatex(0.2,16000,"#frac{#sigma(M_{#gamma#gamma})}{M_{#gamma#gamma}}=6.8%");
  lat1.SetTextSize(0.03);
  lat1.DrawLatex(0.18,14000,"1.0 GeV < E_{#gamma#gamma} < 3.0 GeV"); 
  lat1.SetTextSize(0.04);
  lat1.DrawLatex(0.19,9500,"Design goal");
  lat1.SetTextSize(0.03);
  lat1.DrawLatex(0.18,8000,"#frac{#sigma(E)}{E} = #frac{5.4%}{#sqrt{E[GeV]}} #oplus 2.3%");







}