Graphic representation of solar T_eff values in Table 2. The horizontal line represents the solar T_eff measured by the Stefan-Boltzmann equation. Works that used theoretical models based on 1D atmosphere models are represented by circles, and those that used 3D models are represented by triangles. Grey circles represent works that used the theoretical model of BPO02, and green circles represent works that used a different/enhanced recipe. Works that used KPNO solar atlases are labelled in blue. For them, for comparison purposes, our measurements from corresponding KPNO spectra are included as red crosses in the same line.