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Planck 2015 results. XXVII. The Second Planck Catalogue of Sunyaev-Zeldovich Sources

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 > 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 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.
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Contributor : Sabine Starita <>
Submitted on : Tuesday, February 10, 2015 - 5:25:11 PM
Last modification on : Wednesday, January 6, 2021 - 9:14:04 AM

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P.A.R. Ade, A. Benoit, F. Couchot, S. Henrot-Versillé, A. Mangilli, et al.. Planck 2015 results. XXVII. The Second Planck Catalogue of Sunyaev-Zeldovich Sources. Astronomy and Astrophysics - A&A, EDP Sciences, 2016, 594, pp.A27. ⟨10.1051/0004-6361/201525823⟩. ⟨in2p3-01115296⟩



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