{"paper":{"title":"Results from the Atacama B-mode Search (ABS) Experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.CO","authors_text":"Akito Kusaka, Carl D. Reintsema, Gene Hilton, Glen W. Nixon, Gonzalo A. Palma, Hsiao-mei Cho, James A. Beall, John Appel, Jonathan Sievers, Joseph W. Fowler, Katerina Visnjic, Kent Irwin, Kevin Crowley, Ki-Won Yoon, Lucas Parker, Luis E. Campusano, Lyman A. Page Jr, Matthew Hasselfield, Michael D. Niemack, Michael Nolta, Norman Jarosik, Patricio Gallardo, Sara M. Simon, Shuay-Pwu P. Ho, Srinivasan Raghunathan, Steve K. Choi, Suzanne T. Staggs, Thomas Essinger-Hileman","submitted_at":"2018-01-04T01:38:27Z","abstract_excerpt":"The Atacama B-mode Search (ABS) is an experiment designed to measure cosmic microwave background (CMB) polarization at large angular scales ($\\ell>40$). It operated from the ACT site at 5190~m elevation in northern Chile at 145 GHz with a net sensitivity (NEQ) of 41 $\\mu$K$\\sqrt{\\rm s}$. It employed an ambient-temperature sapphire half-wave plate rotating at 2.55 Hz to modulate the incident polarization signal and reduce systematic effects. We report here on the analysis of data from a 2400 deg$^2$ patch of sky centered at declination $-42^\\circ$ and right ascension $25^\\circ$. We perform a bl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.01218","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":""},"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"}