Radially-dependent weights used to combine Chandra, XMM-Newton, and eROSITA images. The main goals of this weighting scheme are (i) to preserve Chandra’s high angular resolution in the core region, where S/N is very high, and (ii) to suppress the noisy edges of the areas covered by Chandra and XMM-Newton. The images were recalibrated to produce the same total flux from the core region covered by all three instruments.