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Fig. A.1


Line profiles of identified species toward each IRDC, ordered in groups as described in Sect. 3.2.2. The green line is from a single-Gaussian fit. “**” denotes a species with hyperfine multiplets whose HFS fits are plotted in Fig. 5. Profiles in blue denote the lines we detect from the “extra band” where the rms are higher than the others owing to less observation time.

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