–λ₁₅ relation for the forced photometry ACT×MaDCoWS catalog. The color bar on the right indicates the redshift of each candidate. The black points indicate the average in bins of richness. We note that these are not quite the same as those computed from stacking in Fig. 5 as those do not include the co-detections. See Sect. 4 for a discussion of why they were not included. The binned uncertainties were computed via bootstrapping, while the λ₁₅ error bars simply show the bin width. The redshift given is the ACT catalog redshift for those clusters detected in ACT; otherwise, it is the MaDCoWS-reported redshift.