Illustration of the residual contamination correction for the exposure 2022-11-05 UT 01:22:25. This corresponds to the case with the highest contamination. Top panel: residual contamination factor (black) smoothed with a 10 px wide-moving Gaussian box (red) and its associated error bars (black-shaded region). Middle panel: companion spectrum as the output of the extraction process (black) with the contamination contribution (red) and the contamination-corrected companion spectrum (green). All black-shaded regions were excluded from the fit; they correspond to emission lines and detector edges. Third row: contamination contribution within emission lines (same colors). The contamination removal process is able to remove most of the residual primary flux in the companion spectrum, which accounts for ∼10% of the lines flux depending on the exposure.