Upper panel: comparison between effective temperatures derived from spectroscopy and photometry. The solid red solid represents the bisecting line. Bottom panel: residuals, computed as $\mathrm{\Delta }{T}_{\text{eff}}=T_{\mathrm{eff}}^{\mathrm{Phot}}-T_{\mathrm{eff}}^{\mathrm{Spec}}$. They show a mean offset of −90 ± 200 K. The solid red line represents the null difference (ΔT_eff = 0), and the dashed blue line shows the mean residual (−90 K). The region of ±1σ scatter is delimited by dotted blue lines.