Comparison of the ICL, X-ray, and double-membership analyses. The contours of the ICL in the F160W are plotted in blue, and those of the hot-gas distribution are shown in green, as in previous figures. The red circles mark the position of the galaxies that are identified as SPT0615 members, and yellow circles indicate the members of the foreground structure at z ∼ 0.44 according to our ML algorithm. The SPT0615 BCG and two of the three brightest galaxies of the foreground structure are marked with additional white and cyan diamonds, respectively. The third brightest galaxy at z ∼ 0.44 is beyond the F160W footprint, at ∼654 kpc (at z = 0.44) away from the other two, to the southwest. North is up, and east is left.