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Fig. 2
All observed spectra, rebinned to a resolution of 0.5 km s-1. From bottom to top in each panel, the spectra are CO 6−5 (red), [C i] 1−0 (blue) and [C i] 2−1 (black). The measured fluxes and noise levels are listed in Table 1. Vertical offsets of 1 K have been applied for clarity.
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