diff --git a/Projects/S034/Calibration/Nebula/gamma.cxx b/Projects/S034/Calibration/Nebula/gamma.cxx
new file mode 100644
index 0000000000000000000000000000000000000000..d8a7d0d647104074b6a93ec8cb09a3cb1ff6fbf5
--- /dev/null
+++ b/Projects/S034/Calibration/Nebula/gamma.cxx
@@ -0,0 +1,8 @@
+void gamma(){
+
+  auto chain = new TChain("PhysicsTree");
+  chain->Add("root/analysis/gamma/run418.root");
+
+  chain->Draw("Nebula.Time:Nebula.DetectorNumber>>h(150,0,150,1000,0,150)","","colz");
+
+  }