{"work":{"id":"bd764317-c79f-4214-a9eb-d89baab372f5","openalex_id":null,"doi":null,"arxiv_id":"1502.01598","raw_key":null,"title":"Planck 2015 results. XXVII. The Second Planck Catalogue of Sunyaev-Zeldovich Sources","authors":null,"authors_text":"Planck Collaboration, P","year":2015,"venue":"astro-ph.CO","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.","external_url":"https://arxiv.org/abs/1502.01598","cited_by_count":null,"metadata_source":"pith","metadata_fetched_at":"2026-07-03T22:19:00.055445+00:00","pith_arxiv_id":"1502.01598","created_at":"2026-05-13T04:22:14.702982+00:00","updated_at":"2026-07-03T22:19:00.055445+00:00","title_quality_ok":true,"display_title":"Planck 2015 results. XXVII. The Second Planck Catalogue of Sunyaev-Zeldovich Sources","render_title":"Planck 2015 results. XXVII. The Second Planck Catalogue of Sunyaev-Zeldovich Sources"},"hub":{"state":{"work_id":"bd764317-c79f-4214-a9eb-d89baab372f5","tier":"hub","tier_reason":"10+ Pith inbound or 1,000+ external citations","pith_inbound_count":16,"external_cited_by_count":null,"distinct_field_count":4,"first_pith_cited_at":"2024-12-13T08:51:15+00:00","last_pith_cited_at":"2026-06-30T11:22:11+00:00","author_build_status":"not_needed","summary_status":"needed","contexts_status":"needed","graph_status":"needed","ask_index_status":"not_needed","reader_status":"not_needed","recognition_status":"not_needed","updated_at":"2026-08-22T17:59:57.626778+00:00","tier_text":"hub"},"tier":"hub","role_counts":[{"context_role":"background","n":2},{"context_role":"method","n":1}],"polarity_counts":[{"context_polarity":"background","n":2},{"context_polarity":"use_method","n":1}],"runs":{},"summary":{},"graph":{},"authors":[]}}