Left: original CFHTLS and WIRCAM images in the considered bands. Right: residual image from OV_WAV. Red contour is the 2.5σ level from the residual image. Blue contours start at the 3σ level (from the residual image) and progress by steps of 1σ. These contours are computed with the residual images and reported on both residual and original images. The cyan circle (80 kpc in diameter) shows one of the empty residual fields we considered. It also gives the physical size of the figure. Pink ellipses are the areas where we summed the flux of the diffuse light in the residual image. The green cross shows the BCG. From top to bottom: u*, g′, r′ bands.
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