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Fig. A.3

image

Spectra of HC15N, HN13C, H15NC, and H13CN observed with IRAM 30 m towards IRDC G. Only the main component of H13CN was fitted with a single-Gaussian component profile, which was then used to calculate the column densities. The red line indicates the best Gaussian fit and these spectra were scaled to fit into each individual panel.

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