Comparison of the effective temperature obtained from the FSF with literature values in the C07 system. The squares and circles are those stars with literature values from either C07, S10 or C97 already in the C07 system, for which parameters are computed using their stellar type. The black data points are stars that do not have literature values in C07, S10 or C97. The red line is the one-to-one relation. The blue and green lines mark the 1σ and 2σ confidence intervals, respectively. The residuals (FSF – Lit _C07system) are presented in the lower panel.