Fig. 1
Spatially integrated APEX/SEPIA5 spectra of the three lensed sources, targets of this work. The red lines represent the Gaussian fitting to the emission lines (CO(7–6) at approximately zero velocity and CI(2–1)). Zero velocity is set to the CO(1–0) and CO(3–2) line sky frequencies according to the previously measured spectroscopy redshifts given in Table 1.
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