26″ × 26″ cutouts of the group and the surrounding region, with the master mask overlaid (it is important to note the different orientation). This mask was used for photometric measurements of the IHL. From top to bottom, left to right, the three HST bands are shown, followed by the seven JWST bands, with the filters indicated in the bottom left. We show a large region of the sky to demonstrate the masking of galaxies and lack of diffuse light outside of the group. To the north of the group is a large (lower-redshift) galaxy with a tidal stream that we do not believe is part of the group. We therefore do not show this part of the sky, for clarity.