Result of background-only reconstruction. Left: posterior mean of the reconstructed background field after two geoVI iterations. Artifacts at the point-source length scale are visible (low-flux coronas around the point sources, wiggles in the diffuse field). Center: position-space excitation field ξ after two geoVI iterations. Detected point-source candidates above the ξ = 0.65 threshold are circled in lime. Right: reconstructed spatial power spectrum. The posterior mean is shown in blue, posterior samples in gray, and the ground truth in lime.