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Fig. A.2

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Variation of the mean absolute residual (MAR) between observed and modelled RVS spectra, calculated within the DIB window (861.2−866.0 nm), with the spectral S/N. The dashed green lines indicate S/N = 50 and MAR = 0.02, respectively. The dashed black line is fitted to MAR and S/N on a logarithmic scale.
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