Electron and photon energy measurement calibration with the ATLAS detector

An accurate calibration of the energy measurement of electrons and photons is paramount for many ATLAS physics analyses. The calibration of the energy measurement is performed $in$-$situ$ using a large statistics of $Z \rightarrow ee$ events. The results obtained with the $pp$ collisions data recorded in 2015 and 2016 at $\sqrt{s}=13$ TeV, corresponding to an integrated luminosity of 3.2 fb$^{-1}$ and 2.7 fb$^{-1}$ respectively, as well as the corresponding uncertainties on the electron and photon energy scales, are presented