Top panel: histogram of the difference between logg and log g_iso. The blue line corresponds to the Gaussian distribution fit performed, with mean and sigma equal to μ = −0.004 and σ = 0.112, respectively. Bottom panel: difference between logg and log g_iso vs log g. Filled circlesare the stars laying within 2σ of the Gaussian fit performed to the histogram. Empty circles are the points laying beyond the 2σ level, for which the computation was performed a second time, but setting log g = log g_iso.