X-ray images of the Perseus cluster obtained by eROSITA, Chandra, and XMM-Newton before combining them using the weights described in the text. Only the central part of the image is shown, where the contributions of all three images are important. For Chandra and XMM-Newton, only the parts of the image where the radially-dependent weight W(r) is greater than ∼2 × 10⁻² are shown. The dashed circle (shown to facilitate visual comparison) has a radius of 6′.