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Fig. A.2


PV diagrams of individual HCO+ and HNC transitions (contours at 2σ). The HCO+ 1–0 PV diagram uses a combination of PdBI A-array and B-array observations. The HCO+ 2–1 PV diagram is made from PdBI D-array observations. The HNC 1–0 PV diagram uses PdBI B-array observations.

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