--- java/trunk/tracking/src/main/java/org/hps/recon/tracking/TrackDataDriver.java	2014-06-03 14:19:19 UTC (rev 656)
+++ java/trunk/tracking/src/main/java/org/hps/recon/tracking/TrackDataDriver.java	2014-06-03 20:26:57 UTC (rev 657)
@@ -111,6 +111,8 @@

 					
 					// Find the t0 residual and add it to the list of residuals
 					t0Residual = trackTime - cluster.time(); 

+					// Apply correction to t0 residual
+					t0Residual /= Math.sqrt((totalHits - 1)/totalHits);

 					t0Residuals.add(t0Residual);
 				}
 			}