Fig. 3.

Spectroscopic redshift offset between submillimeter and optical or near-IR observations. Bottom: the blue filled circles indicate the new zspec, submm determinations for trustable emission lines detected by ALMA against the optical or near-IR zspec, opt from the COSMOS master compilation (Salvato et al., in prep.). The solid black line marks the locus of zspec, submm = zspec, opt. Top: vsubmm − vopt difference as a function of zspec, opt, excluding three catastrophic strong outliers and an ascertained misidentification. The solid and dotted lines mark the mean and the 1σ dispersion of the sample.
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