Fig. 1

Redshift distribution of the target SMGs divided into three subsamples: the red and green histograms show the spectroscopic and photometric redshifts, respectively, while the blue histogram shows the redshift values derived from the radio-to-submm spectral index (see Table 1). The redshift bins have a width of Δz = 0.4. The lower redshift limits were placed in the bins corresponding to those values.
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