The PSZ-MCMF catalogue of Planck clusters over the DES region

Hernández-Lang, D.; Klein, M.; Mohr, J. J.; Grandis, S.; Melin, J. -B.; Tarrío, P.; Arnaud, M.; Pratt, G. W.; Abbott, T. M. C.; Aguena, M.; Alves, O.; Andrade-Oliveira, F.; Bacon, D.; Bertin, E.; Brooks, D.; Burke, D. L.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Castander, F. J.; Costanzi, M.; Da Costa, L. N.; Pereira, M. E. S.; Desai, S.; Diehl, H. T.; Doel, P.; Everett, S.; Ferrero, I.; Flaugher, B.; Frieman, J.; García-Bellido, J.; Gruen, D.; Gruendl, R. A.; Gschwend, J.; Gutierrez, G.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; James, D. J.; Kuehn, K.; Kuropatkin, N.; Lahav, O.; Lidman, C.; Melchior, P.; Mena-Fernández, J.; Menanteau, F.; Miquel, R.; Palmese, A.; Paz-Chinchón, F.; Pieres, A.; Plazas Malagón, A. A.; Raveri, M.; Rodriguez-Monroy, M.; Romer, A. K.; Scarpine, V.; Sevilla-Noarbe, I.; Smith, M.; Suchyta, E.; Tarle, G.; Thomas, D.; Weaverdyck, N.; Collaboration, Des

doi:10.1093/mnras/stad2319

We present the first systematic follow-up of Planck Sunyaev-Zeldovich effect (SZE) selected candidates down to signal-to-noise (S/N) of 3 over the 5000 deg(2) covered by the Dark Energy Survey. Using the MCMF cluster confirmation algorithm, we identify optical counterparts, determine photometric redshifts, and richnesses and assign a parameter, f(cont), that reflects the probability that each SZE-optical pairing represents a random superposition of physically unassociated systems rather than a real cluster. The new PSZ-MCMF cluster catalogue consists of 853 MCMF confirmed clusters and has a purity of 90 per cent. We present the properties of subsamples of the PSZ-MCMF catalogue that have purities ranging from 90 per cent to 97.5 per cent, depending on the adopted f(cont) threshold. Halo mass estimates M-500, redshifts, richnesses, and optical centres are presented for all PSZ-MCMF clusters. The PSZ-MCMF catalogue adds 589 previously unknown Planck identified clusters over the DES footprint and provides redshifts for an additional 50 previously published Planck-selected clusters with S/N>4.5. Using the subsample with spectroscopic redshifts, we demonstrate excellent cluster photo-z performance with an RMS scatter in Delta z/(1 + z) of 0.47 per cent. Our MCMF based analysis allows us to infer the contamination fraction of the initial S/N>3 Planck-selected candidate list, which is & SIM;50 per cent. We present a method of estimating the completeness of the PSZ-MCMF cluster sample. In comparison to the previously published Planck cluster catalogues, this new S/N>3 MCMF confirmed cluster catalogue populates the lower mass regime at all redshifts and includes clusters up to z similar to 1.3.

The PSZ-MCMF catalogue of Planck clusters over the DES region / Hernández-Lang, D., Klein, M., Mohr, J.J., Grandis, S., Melin, J.-B., Tarrío, P., Arnaud, M., Pratt, G.W., Abbott, T.M.C., Aguena, M., Alves, O., Andrade-Oliveira, F., Bacon, D., Bertin, E., Brooks, D., Burke, D.L., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Castander, F.J., et al.. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - 525:1(2023), pp. 24-43. [10.1093/mnras/stad2319]