Top panel: histogram of z _h7, redshifts from this work where there is a good fit with z > 0. Middle panel: other catalog spectroscopic redshifts z _s compared to z _h7, colored according to the number of features detected; galaxies without spectroscopic redshifts from other catalogs are set to z _s = 0, and galaxies without a good fit from HALO7D spectra are set to z _h7 = 0. Bottom: redshift difference between z _s and z _h7, normalized by 1 + z _s .