Fig. 4
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Spectra, in black, of DNC(3–2), NS+ (4–3), PN(5–4), HCNH+ (3–2) shown as filled grey histograms. The dashed red line shows the systemic velocity of the source at –43.13 kms−1 (Csengeri et al. 2018). The blue line represents the best Gaussian fit for each line. Eup represents the upper-level energy of the transition in temperature units.
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