Fig. A.3

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Spectra of molecules obtained by averaging several lines observed with IRAM-30m in comet C/2021 A1 between 8 and 13 December 2021. The vertical axis is main beam brightness temperature in K. The horizontal axis is the Doppler velocity in the rest frame of the comet. The number of lines averaged is provided for each molecule, either in the 2 mm band (147–153 and 163–171 GHz) or 1 mm band (209–272 GHz).
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