Portion of the spectrum of star CES 1222+1136, showing the G band on the region 4277–4282 Å. The solid curves show the best fit with A(C) = 5.67 (thicker red line), and the red shaded areas display A(C) ± 0.30 dex. The dotted blue line represents the synthesis if C is fully removed. The atmospheric parameters T_eff (K), log ɡ, [Fe/H], and υ_turb (km s⁻¹) are shown in the lower right corner.