Spectroscopic vs. photometric redshifts for the CLASH spec-z sample whose magnitude and redshift distributions are shown in Fig. 2. The black squares and blue triangles are the Le Phare and BPZ photo-z for galaxies observed in at least 7 bands with secure spec-z. The grey triangles and grey diamonds are respectively BPZ and Le Phare secure redshifts observed in less than 13 filters. The empty red triangles and diamonds are the spec-z with a brighter neighbour within 3′′ of the closest match to the spec-z. The top figure corresponds to galaxy lensed images behind the cluster at a redshift of zs > zcluster + 0.2. The bottom figure corresponds to galaxy cluster members and foreground galaxies at zs ≤ zcluster + 0.2.
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