Fig. A.1.
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Examples of spectra (grey) and the median Gaussian fit (red solid line) used to image the intensity maps in Sect. 3.1. The channels used to create the intensity maps (i.e., FWHM ± σFWHM of the median Gaussian fit) are highlighted with the light-brown shaded area. The horizontal dashed line shows the 1σ noise level of the spectrum.
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