Spatial distribution of LAEs in overdensities. LAEs are shown as red circles sized according to the log of their Lyα luminosity. The blue circles in groups 2 and 6 identify the AGN (also sized according the log of their Lyα luminosity). The location of each group member is overlaid on the HST F775W gray scale image. The field locations are shown as a gray circle (MXDF) superimposed on a square (UDF-10). Group ID and redshift are labeled. Fields have the MOSAIC size and orientation, that is 3 arcmin and 42° PA. The blue line at the bottom of each image indicates the 5 cMpc scale.