Spectra of additional line emitters identified in ALMA datacubes. Left panel: CO(4–3) line of C2 (QSO-SE) detected in the ALMA band 3 spectral scan of C4, corrected for the PB response. Right panel: [CI]_609 μm line of C6 identified in the ALMA band 6 datacube. Data and the best-fit model are shown in yellow and red, respectively. The ±1σ RMS noise range of the data is indicated by the gray shaded area. The top scales report the expected line redshifts.