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Fig. 6

image

Example spline baseline correction for a typical OTF scan of 84 dumps length. Top left panel: baseline after standard polynomial order 3 baseline correction. The average over 84 dumps is shown in dark blue. Top right panel: waterfall plot of 84 spectra taken during an OTF scan. The dip at −25 km s−1 is common to all spectra. Bottom left panel: baseline after spline correction. The corresponding waterfall plot is shown on the right side. Bottom right panel: waterfall map of 84 spectra after spline correction.

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