Figure 7

[Color online]Study using a toy Monte Carlo simulation of the convergence of the iterative calibration procedure based on equalization of the $\pi^0$ peak position. The residual de-calibration $\sigma_{\rm c}$ is shown as a function of the iteration number. Two values of calorimeter energy resolution are considered, standard ($\sigma_{E}$) and twice as poor ($2\sigma_{E}$).