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Fig. B.1

image

Spectra of the unblended lines of NH2CN detected with ALMA towards IRAS 16293 B at the full-beam offset position (left), at the half-beam offset position (middle), and at the peak continuum position (right). The best-fit model for Tex = 300 K at the full-beam offset position is shown in red in the left panels. The identification of the other lines is indicated in blue. The dashed lines in the middle and right panels indicate the average velocity of the absorptions, 3.8 km s−1. The dotted lines show the level 0.

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