Fig. C.1

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Spectra acquired from different radial regimes with GoFish. The radial regimes for each spectrum are indicated in the top left. From top to bottom are shown DCO+ J=4-3, H2CO J=42,3-32,2, and H2CO J=42,2-32,1. The horizontal red dashed line in each spectrum indicates the 3σ RMS level, while the vertical black dashed line indicates the systemic velocity of 3.6 km s−1.
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