Fig. 4
Examples of reduced and calibrated spectra of observed NH2D lines at 110 and 74 GHz. The bright line of G31.41+0.31 and G34.26+0.15 with a frequency close to 74.15 GHz consists of four blended lines of CH3OCH3; their frequencies are labelled as lines in the spectra. Results of simultaneous modelling of the NH2D transitions at 110 and 74 GHz (see Sect. 3.4) are illustrated in red.
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