(a) Two simulated point sources A and B in a one‐dimensional image, modelled with the same PSF but different normalizations, represented by the dashed and triple‐dot–dashed curves, respectively. The total flux in the image as a function of position x is given by equation (A1) and is represented by the solid line. (b) The thin black lines are the PSFs, p_A and p_B, centred at x= 200 and 300, respectively. Both PSFs have width σ= 50. The thick grey lines are the PSFs weighted for deblending, q_A and q_B, given by equation (A5). (c) The reconstructed sources given by the image data (solid line in panel a) weighted by the PSFs in the middle panel. The thin black lines are obtained using the unweighted PSFs p in equation (A2), and the thick grey lines using the weighted PSFs q in equation (A6).