{"paper":{"title":"The Halpha Luminosity Function of the Galaxy Cluster Abell 521 at z = 0.25","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Kazuhiro Shimasaku, Kazuyoshi Umeda, Masafumi Yagi, Masaru Ajiki, Sadanori Okamura, Sanae F. Yamada, Shinobu S. Fujita, Takashi Murayama, Tohru Nagao, Yasuhiro Shioya, Yoshiaki Taniguchi, Yutaka Komiyama","submitted_at":"2003-10-08T14:35:26Z","abstract_excerpt":"We present an optical multicolor-imaging study of the galaxy cluster Abell 521 at $z = 0.25$, using Suprime-Cam on the Subaru Telescope, covering an area of $32 \\times 20$ arcmin$^2$ ($9.4 \\times 5.8 h_{50}^{-2}$ Mpc$^2$ at $z = 0.25$). Our imaging data taken with both a narrow-band filter, $NB816$ ($\\lambda_0 = 8150$\\AA and $\\Delta \\lambda = 120$\\AA), and broad-band filters, $B,V,R_{\\rm C}, i^\\prime$, and $z^\\prime$ allow us to find 165 H$\\alpha$ emitters. We obtain the H$\\alpha$ luminosity function (LF) for the cluster galaxies within 2 Mpc; the Schechter parameters are $\\alpha = -0.75 \\pm 0"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0310212","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0310212/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}