Stacked radial profiles of the 18 415 sources detected with the U-net in the X-ray ROSAT map as a function of their associated prediction indexes p. The backgrounds of the 18 415 maps were substracted individually to take the galactic plane into account. The cyan dotted line indicates the PSF of ROSAT, normalised to the profile of the first bin. This suggests statistical indications of diffuse gas emission in X-rays for the 18 415 detections, which decreases as a function of their prediction indexes that are output by the U-net. Error bars computed with the bootstrap method ensure the significance by re-sampling the profiles.