{"paper":{"title":"The SDSS Coadd: 275 deg^2 of Deep SDSS Imaging on Stripe 82","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Andrew C. Becker, Brian Yanny, David E. Johnston, Gajus Miknaitis, Hee-Jong Seo, Huan Lin, Hubert Lampeitl, James Annis, James E. Gunn, Jeffrey M. Kubo, Jiangang Hao, Linhua Jiang, Marcelle Soares-Santos, Melanie Simet, Michael A. Strauss, Robert H. Lupton, Scott Dodelson, Sebastian Jester, Xiaohui Fan, Zeljko Ivezic","submitted_at":"2011-11-28T21:37:07Z","abstract_excerpt":"We present details of the construction and characterization of the coaddition of the Sloan Digital Sky Survey Stripe 82 \\ugriz\\ imaging data. This survey consists of 275 deg$^2$ of repeated scanning by the SDSS camera of $2.5\\arcdeg$ of $\\delta$ over $-50\\arcdeg \\le \\alpha \\le 60\\arcdeg$ centered on the Celestial Equator. Each piece of sky has $\\sim 20$ runs contributing and thus reaches $\\sim2$ magnitudes fainter than the SDSS single pass data, i.e. to $r\\sim 23.5$ for galaxies. We discuss the image processing of the coaddition, the modeling of the PSF, the calibration, and the production of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.6619","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"}