Normalized line profiles of carbon-bearing species, illustrating their different kinematics. The solid vertical line marks the source velocity of 11.4 km s^-1. The short vertical dashed lines show the CH hyperfine components except the one the v_lsr is centered on. No CASSIS model was made for CH, see text. The CII absorption at 11...15 km s^-1 is an artefact due to contamination in the reference spectra. The dip in CI at ~10 km s^-1 as also due to reference beam contamination.