Photometric profile example of a validated impact flash using pseudocolors before (left) and after (right) the lunar background subtraction. Images include an area of 100 × 100 pixels around the flash with the colors to denote the intensity (red for flash). Left image: should be noticed the inhomogeneity of the background around the flash that makes the subtraction of the background determined in an annulus inaccurate. Right image: background around the flash is more smooth and more uniform and contains only the residual noise. For more details, see text.