Cutouts of source ID = 16479 of the CANDELS/GOODS-North field in the U band (left) and in the R band (center) observed by the LBC instrument. The cutout on the right shows the same sky area observed by HST in the V606 filter. The position of the galaxy with spectroscopic redshift at z = 3.371 is indicated by the green circle. The green arrow in the U band marks the position of the centroid of source ID = 16479 derived from the R-band image. At ~ 1.0 arcsec from the z ~ 3.3 source, towards the right, there is a faint galaxy at z_phot = 2.2 that is clearly detected in all three bands. Close to the main target there are also two very faint blobs in the HST image, which are blended with the z ~ 3.3 galaxy in the ground-based LBC images. The size of each image is 17 arcsec by 17 arcsec.