{"paper":{"title":"VIMOS Ultra-Deep Survey (VUDS): Witnessing the Assembly of a Massive Cluster at z~3.3","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Cimatti, A. Durkalec, A. Fontana, A. Grazian, B.C. Lemaux, B. Garilli, B. Ribeiro, C. L\\'opez-Sanjuan, C. Moreau, D.D. Kocevski, D. Maccagni, D. Schaerer, D. Vergani, E. Vanzella, E. Zucca, G. Zamorani, J.G. Cuby, L. A. M. Tasca, L. Cassar\\`a, L.M. Lubin, L. Pentericci, L. Tresse, M. Castellano, M. Giavalisco, M. Salvato, M. Scodeggio, M. Talia, N. P. Hathi, N. Scoville, O. Cucciati, O. Ilbert, O. Le F\\`evre, P. Capak, P. Cassata, P.W. Wang, R. Amorin, R.R. Gal, R. Thomas, S. Bardelli, S. Charlot, S. de la Torre, S. Fotopoulou, S. Paltani, T. Contini, T. Sadibekova, V. Le Brun, V. Sommariva, Y. Mellier, Y. Taniguchi","submitted_at":"2014-03-17T19:53:25Z","abstract_excerpt":"Using new spectroscopic observations obtained as part of the VIMOS Ultra-Deep Survey (VUDS), we perform a systematic search for overdense environments in the early universe ($z>2$) and report here on the discovery of Cl J0227-0421, a massive protocluster at $z=3.29$. This protocluster is characterized by both the large overdensity of spectroscopically confirmed members, $\\delta_{gal}=10.5\\pm2.8$, and a significant overdensity in photometric redshift members. The halo mass of this protocluster is estimated, by a variety of methods, to be roughly $3\\times10^{14}$ $\\mathcal{M}_{\\odot}$ at $z\\sim3"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.4230","kind":"arxiv","version":4},"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"}