Analysis of the dependence of the iron detection on the model used to compute the CCF. Top: four-epoch co-added CCFs for Fe I computed with different templates that correspond to each P-T profile (bottom left panel). Bottom left: P-T profiles (see also Fig. B.1 and Table B.1). Bottom right: maximum S/N value of Gaussian fit to co-added CCFs of four epochs, computed with the Fe I template corresponding to each P-T profile.