Electron and photon energy measurement calibration with the ATLAS detector

An accurate calibration of the energy measurement of electrons and photons is needed for many ATLAS physics analyses. The calibration of the energy measurement is performed in-situ using a large statistics of $Z \to e^{-}e^{+}$ events. A pre-requisite of this calibration is a good understanding of the material in front of the calorimeter and of the inter-calibration of the different calorimeter layers. The $Z \to e^{-}e^{+}$ sample is also used to measure the energy resolution. The results obtained with proton-proton collision data at $\sqrt{s}=13\,\mathrm{TeV}$ in 2015-2017 corresponding to an integrated luminosity of $80\,\mathrm{fb}^{-1}$ are presented as well as the corresponding uncertainties on the electron and photon energy scales.