In this work, we present and characterize the galaxy cluster catalog detected by the cluster finder, which is based on photometric redshifts rather than red-sequence identification, on the full six years of observations of the Dark Energy Survey (DES-Y6). The full catalog contains over 400k detected clusters with richnesses, ̊ich, above 5 and that reach redshifts up to z=1. 3. We also provide a version of the catalog where the observation depth and richness computation are homogenized to be used for cosmology, containing 33k rich (̊ich>25) clusters. We compare our results with the previous catalog obtained from the DES first-year data release (DES-Y1). We find that essentially all clusters within the common footprint and depth limit are recovered. The deeper observations on DES-Y6 and the more complete available spectroscopic redshift sample lead to improvements in the redshifts of the clusters, resulting in an average scatter of 1. 4% and offset of 0. 2%. The optical clusters are also cross matched with Sunyaev Zel'dovich Effect (cluster samples detected by the South Pole Telescope (SPT) and the Atacama Cosmology Telescope (ACT). We find that essentially all clusters with reasonable overlapping footprint have a corresponding cluster. Conversely, 90% of the optical detections with richness greater than 150 have a counterpart in the deeper regions of the surveys. Based on cross match with the catalogs, we also find that 15-20% of the matched systems have more than one possible counterpart at the same redshift and within the R₅00c, indicating possible interacting or unrelaxed systems. Finally, given the optical and beams, and centerings are found to be consistent. A more detailed study of the mass-richness relation will be presented in a separate paper.
Benoist et al. (Tue,) studied this question.