Intervening C i absorption towards the quasar J1439+1117: spectrum (black curve) and simultaneous fit to the four transitions (red curve). The bottom black curve in each panel corresponds to the low noise level (rms ≃ 1.7%). At v_helio = 0 km s^-1, the redshift is z = 2.418372: the corresponding C i component has the highest column density. The blue tick marks in the C iλ1656 panel (lower one) correspond to the stronger seven components. In the C iλ1560 panel, the two tick marks correspond to weaker components at −104 and −118 km s^-1. In the upper panel, the absorption seen in the 50–90 km s^-1 velocity range is a blend of C i^⋆λ1276 and C iλ1277 from the two weak components with the bluest velocity.