Planck 2015 results. XXVII. The Second Planck Catalogue of Sunyaev-Zeldovich Sources
Planck Collaboration, P. A. R. Ade, N. Aghanim, M. Arnaud, M. Ashdown, J. Aumont, C. Baccigalupi, A. J. Banday, R. B. Barreiro, R. Barrena, J. G. Bartlett, N. Bartolo, E. Battaner, R. Battye, K. Benabed, A. Benoît, A. Benoit-Lévy, J. -P. Bernard, M. Bersanelli, P. Bielewicz, I. Bikmaev, H. Böhringer, A. Bonaldi, L. Bonavera, J. R. Bond, J. Borrill, F. R. Bouchet, M. Bucher, R. Burenin, C. Burigana, R. C. Butler, E. Calabrese, J. -F. Cardoso, P. Carvalho, A. Catalano, A. Challinor, A. Chamballu, R. -R. Chary, H. C. Chiang, G. Chon, P. R. Christensen, D. L. Clements, S. Colombi, L. P. L. Colombo, C. Combet, B. Comis, F. Couchot, A. Coulais, B. P. Crill, A. Curto, F. Cuttaia, H. Dahle, L. Danese, R. D. Davies, R. J. Davis, P. de Bernardis, A. de Rosa, G. de Zotti, J. Delabrouille, F. -X. Désert, C. Dickinson, J. M. Diego, K. Dolag, H. Dole, S. Donzelli, O. Doré, M. Douspis, A. Ducout, X. Dupac, G. Efstathiou, P. R. M. Eisenhardt, F. Elsner, T. A. Enßlin, H. K. Eriksen, E. Falgarone, J. Fergusson, F. Feroz, A. Ferragamo, F. Finelli, O. Forni, M. Frailis, A. A. Fraisse, E. Franceschi, A. Frejsel, S. Galeotta, S. Galli, K. Ganga, R. T. Génova-Santos, M. Giard, Y. Giraud-Héraud, E. Gjerløw, J. González-Nuevo, K. M. Górski, K. J. B. Grainge, S. Gratton, A. Gregorio, A. Gruppuso, J. E. Gudmundsson, F. K. Hansen, D. Hanson, D. L. Harrison, A. Hempel, S. Henrot-Versillé, C. Hernández-Monteagudo, D. Herranz, S. R. Hildebrandt, E. Hivon, M. Hobson, W. A. Holmes, A. Hornstrup, W. Hovest, K. M. Huffenberger, G. Hurier, A. H. Jaffe, T. R. Jaffe, T. Jin, W. C. Jones, M. Juvela, E. Keihänen, R. Keskitalo, I. Khamitov, T. S. Kisner, R. Kneissl, J. Knoche, M. Kunz, H. Kurki-Suonio, G. Lagache, J. -M. Lamarre, A. Lasenby, M. Lattanzi, C. R. Lawrence, R. Leonardi, J. Lesgourgues, F. Levrier, M. Liguori, P. B. Lilje, M. Linden-Vørnle, M. López-Caniego, P. M. Lubin, J. F. Macías-Pérez, G. Maggio, D. Maino, D. S. Y. Mak, N. Mandolesi, A. Mangilli, P. G. Martin, E. Martínez-González, S. Masi, S. Matarrese, P. Mazzotta, P. McGehee, S. Mei, A. Melchiorri, J. -B. Melin, L. Mendes, A. Mennella, M. Migliaccio, S. Mitra, M. -A. Miville-Deschênes, A. Moneti, L. Montier, G. Morgante, D. Mortlock, A. Moss, D. Munshi, J. A. Murphy, P. Naselsky, A. Nastasi, F. Nati, P. Natoli, C. B. Netterfield, H. U. Nørgaard-Nielsen, F. Noviello, D. Novikov, I. Novikov, M. Olamaie, C. A. Oxborrow, F. Paci, L. Pagano, F. Pajot, D. Paoletti, F. Pasian, G. Patanchon, T. J. Pearson, O. Perdereau, L. Perotto, Y. C. Perrott, F. Perrotta, V. Pettorino, F. Piacentini, M. Piat, E. Pierpaoli, D. Pietrobon, S. Plaszczynski, E. Pointecouteau, G. Polenta, G. W. Pratt, G. Prézeau, S. Prunet, J. -L. Puget, J. P. Rachen, W. T. Reach, R. Rebolo, M. Reinecke, M. Remazeilles, C. Renault, A. Renzi, I. Ristorcelli, G. Rocha, C. Rosset, M. Rossetti, G. Roudier, E. Rozo, J. A. Rubiño-Martín, C. Rumsey, B. Rusholme, E. S. Rykoff, M. Sandri, D. Santos, R. D. E. Saunders, M. Savelainen, G. Savini, M. P. Schammel, D. Scott, M. D. Seiffert, E. P. S. Shellard, T. W. Shimwell, L. D. Spencer, S. A. Stanford, D. Stern, V. Stolyarov, R. Stompor, A. Streblyanska, R. Sudiwala, R. Sunyaev, D. Sutton, A. -S. Suur-Uski, J. -F. Sygnet, J. A. Tauber, L. Terenzi, L. Toffolatti, M. Tomasi, D. Tramonte, M. Tristram, M. Tucci, J. Tuovinen, G. Umana, L. Valenziano, J. Valiviita, B. Van Tent, P. Vielva, F. Villa, L. A. Wade, B. D. Wandelt, I. K. Wehus, S. D. M. White, E. L. Wright, D. Yvon, A. Zacchei, A. Zonca
TL;DR
Planck 2015 results. XXVII delivers PSZ2, the second all-sky SZ cluster catalogue, with 1653 detections (1203 confirmed, 1094 redshifted) across 83.6% of the sky, leveraging three detection pipelines (MMF1, MMF3, PwS) to optimize completeness and reliability. The work comprehensively characterizes the selection function via Monte-Carlo injections, external cross-checks, and neural-network quality assessments, enabling robust cosmological use of the SZ sample. It provides detailed multi-wavelength ancillary information (X-ray MCXC, optical redMaPPer, IRWISE, SPT/ACT cross-matches) and derives SZ-based mass proxies M_{SZ} with Y_{5R500} posteriors, including conversions to Y_{500} under pressure-profile priors. The catalogue reveals a population of low-redshift X-ray underluminous clusters highlighted by SZ selection and emphasizes the importance of pressure-profile priors and completeness modeling for accurate cosmological inferences from SZ-selected clusters.
Abstract
We present the all-sky Planck catalogue of Sunyaev-Zeldovich (SZ) sources detected from the 29 month full-mission data. The catalogue (PSZ2) is the largest SZ-selected sample of galaxy clusters yet produced and the deepest all-sky catalogue of galaxy clusters. It contains 1653 detections, of which 1203 are confirmed clusters with identified counterparts in external data-sets, and is the first SZ-selected cluster survey containing > $10^3$ confirmed clusters. We present a detailed analysis of the survey selection function in terms of its completeness and statistical reliability, placing a lower limit of 83% on the purity. Using simulations, we find that the Y5R500 estimates are robust to pressure-profile variation and beam systematics, but accurate conversion to Y500 requires. the use of prior information on the cluster extent. We describe the multi-wavelength search for counterparts in ancillary data, which makes use of radio, microwave, infra-red, optical and X-ray data-sets, and which places emphasis on the robustness of the counterpart match. We discuss the physical properties of the new sample and identify a population of low-redshift X-ray under- luminous clusters revealed by SZ selection. These objects appear in optical and SZ surveys with consistent properties for their mass, but are almost absent from ROSAT X-ray selected samples.