Illustration of the 1/f noise correction. Example of an image from NIRSpec NRS2 detector before (left) and after (right) correction for 1/f correlated noise. The box to the right of each image plots the median values of each horizontal slit in the image. The boxes at the bottom show the median values of each vertical slit in the image. The smaller image in the middle corresponds to the map of mean values subtracted from the initial image.