Electron energy reconstruction in the ATLAS electromagnetic End-Cap calorimeter using calibration hits

The Large Hadron Collider, the most powerfull proton-proton collider existing so far, produced its first collisions during the months of November and December of 2009 and it is currently starting its first year of running. The high center of mass energy, high luminosity and several physic channels present at the LHC put a set of requirements in the expected performance of the ATLAS detector.