Mean of the log₁₀(E_rec[T_i]/E_mean) values for selected γ-ray-like events and its standard deviation, for each telescope and season, where E_rec[T_i] is the reconstructed energy of telescope i and E_mean the average reconstructed energy from the entire array, using the same weights for all telescopes. For a given epoch, the energies reconstructed by the different telescopes do not deviate on average more than ∼10% with respect to the mean energy reconstructed with the entire array.