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Fig. 12

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Assessment of instrumental straylight properties. Left panel: saturated image of the lower right corner of the spectral image. Boxes show the vignetted (red), straylight-dominated (green), and signal-dominated (blue) regions. Right panels: histograms of these regions with their respective mean values. For the box containing the spectra, the various contributions can be identified as partially overlapping populations, as indicated in the figure.

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