ECAL hit timing with Run1 and Run2 energy reconstruction in early 25ns data at 13 TeV

In the following hit time distributions in the electromagnetic calorimeter barrel are presented for hits with measured energy larger than 1 GeV in collision data at \sqrt(s)=13 TeV and 25 ns bunch spacing. Hit time distributions are presented using two different methods for energy reconstruction: the "weights method" (default during Run 1) and the "multifit method" (developed for Run 2). With the weights method the energy deposits in bunch crossings (BX) different from the one firing the trigger contribute to the hit energy. The multifit method largely reduces the contribution to the hit energy from out of time energy deposits. The time reconstruction method is the same as used in Run I and does not depend on the method used for energy reconstruction (multifit or weights). The reconstructed hit energy has an influence on the timing plots due to the energy cut applied (1 GeV) in order to avoid possible noise contamination.