Fig. 3.
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Example for the PCA-driven sky-line residual suppression with CubePCA. We show a coadded spectrum within a 4″ × 4″ region before (black line) and after cleaning (red line) the sky line residuals using CubePCA. Only residuals in the wavelength-range highlighted by the shaded gray area are cleaned while the other wavelengths remain untouched.
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