Relative error on the determination of T_eff (e_Teff) as a function of the restoration factor (top) for all simulated planets, stars, and separations, and both coronagraphs (LSC in blue, ALSC in orange). The gray area corresponds to a ±20% interval. The bottom plot gives the fraction of planets for which e_Teff is within ±20%, as a function of the restoration factor. The restoration factors below which 68% and 95% of the models have e_Teff within ±20% on T_eff are 48% and 10%, respectively.