Theoretical accuracy (minimal standard deviation given by the Cramér-Rao lower bounds) δ_x0 on the estimated astrometric location x₀ from PACO and its robust extension presented in this paper around the HIP 72192 star. Here, δ_x0 maps are multiplied by the flux α of the exoplanet (expressed in arcsec × flux). The gain (in percent) brought by the robust approach is given on the right. The six fake sources closest to the host star are denoted by digits ① to ⑥.