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Planck 2015 results: XXVII. The second Planck catalogue of Sunyaev-Zeldovich sources

  • Author(s): Ade, PAR
  • Aghanim, N
  • Arnaud, M
  • Ashdown, M
  • Aumont, J
  • Baccigalupi, C
  • Banday, AJ
  • Barreiro, RB
  • Barrena, R
  • Bartlett, JG
  • Bartolo, N
  • Battaner, E
  • Battye, R
  • Benabed, K
  • Benoît, A
  • Benoit-Lévy, A
  • Bernard, JP
  • Bersanelli, M
  • Bielewicz, P
  • Bikmaev, I
  • Böhringer, H
  • Bonaldi, A
  • Bonavera, L
  • Bond, JR
  • Borrill, J
  • Bouchet, FR
  • Bucher, M
  • Burenin, R
  • Burigana, C
  • Butler, RC
  • Calabrese, E
  • Cardoso, JF
  • Carvalho, P
  • Catalano, A
  • Challinor, A
  • Chamballu, A
  • Chary, RR
  • Chiang, HC
  • Chon, G
  • Christensen, PR
  • Clements, DL
  • Colombi, S
  • Colombo, LPL
  • Combet, C
  • Comis, B
  • Couchot, F
  • Coulais, A
  • Crill, BP
  • Curto, A
  • Cuttaia, F
  • Dahle, H
  • Danese, L
  • Davies, RD
  • Davis, RJ
  • De Bernardis, P
  • De Rosa, A
  • De Zotti, G
  • Delabrouille, J
  • Désert, FX
  • Dickinson, C
  • Diego, JM
  • Dolag, K
  • Dole, H
  • Donzelli, S
  • et al.
Abstract

© 2016 ESO. 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 systematic all-sky surveyof 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 >103 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 estimates of the SZ strength parameter Y5R500are 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.

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