Mean (left) and peak (right) signal-to-noise ratios (S/N) for our candidates in the ALMA maps. The LBG candidates are separated into three photometric redshift sub-samples, represented by distinct colors. The mean value is centered around S/N ∼ 0 (vertical dark line) and is roughly Gaussian. The peak values are centered around S/N ∼ 1, rather than S/N ∼ 0 (vertical dark line), due to the selection of the peak pixel which arises within half a beamwidth; this conservatively biases the maximum flux associated with a candidate to higher values.