{"paper":{"title":"First Results from Z-FOURGE: Discovery of a Candidate Cluster at z = 2.2 in COSMOS","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Andy Monson, Caroline M. S. Straatman, Casey Papovich, Daniel D. Kelson, David Murphy, Glenn G. Kacprzak, Gregory B. Poole, Ivo Labb\\'e, Karl Glazebrook, Kim-Vy H. Tran, Lee R. Spitler, Patrick J. McCarthy, Pieter van Dokkum, Ryan Quadri, S. Eric Persson, Vithal Tilvi","submitted_at":"2011-12-12T20:45:07Z","abstract_excerpt":"We report the first results from the Z-FOURGE survey: the discovery of a candidate galaxy cluster at z = 2.2 consisting of two compact overdensities with red galaxies detected at >20{\\sigma} above the mean surface density. The discovery was made possible by a new deep (Ks < 24.8 AB 5{\\sigma}) Magellan/FourStar near-IR imaging survey with 5 custom medium-bandwidth filters. The filters pinpoint the location of the Balmer/4000\\AA\\ break in evolved stellar populations at 1.5 < z < 3.5, yielding significantly more accurate photometric redshifts than possible with broadband imaging alone. The overde"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.2691","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}