Column-response non uniformity (CRNU) measured for the same Gaia CCD plotted in Fig. 3 for λ = 400 nm (blue line), 550 nm (black line) and 900 nm (red line). At column 1253 we can see the effect of a dead pixel. The discontinuity around column 1350 is due to the stitch blocks. Data courtesy of ESA – e2V.
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