Left panels: continuum-normalized VIS X-shooter spectrum of Sz 117 in the five regions analyzed with ROTFIT (black full lines) with the best fitting template overplotted (red dotted lines). Right panels: χ² contour maps in the T_eff–log g plane. In each panel, the blue dot indicates the best values of T_eff and log g, while the 1σ confidence level is denoted by the thick red contour. The errorbars on T_eff and log g are also indicated.