         let energy = getEnergy(event, type: .recoil)
         let info = [kEnergy: energy,
                     kDeltaTime: deltaTime,
-                    kEventNumber: eventNumber()] as [String : Any]
+                    kEventNumber: eventNumber(),
+                    kMarker: getMarker(event)] as [String : Any]
         recoilsFrontPerAct.append(info)
     }
     

                    kStrip0_15: strip_0_15,
                    kEnergy: energy,
                    kEventNumber: eventNumber(),
                    kDeltaTime: deltaTime] as [String : Any]
        fissionsAlphaBackPerAct.append(info)
    }
    

    fileprivate let kDeltaTime = "delta_time"
    fileprivate let kChannel = "channel"
    fileprivate let kEventNumber = "event_number"
    fileprivate let kMarker = "marker"
    
    // public during migration to Swift phase
    fileprivate var file: UnsafeMutablePointer<FILE>!
