Cutouts of source ID = 25155 in the U-band (left) and in the R-band (centre) by the LBC instrument. The cutout on the right shows the same sky area observed by HST in the I814W filter. The position of the spectroscopic redshift is indicated with a green circle. The size of the cutouts is 4.3 arcsec. This object seems isolated in the HST I814W band, but there is a possible hint of the presence of a very faint source in the north-west of the bright galaxy at z ~ 3.3. There is a detection at ~2σ level in the U-band of LBC.