{"paper":{"title":"Confirmation of Wide-Field Signatures in Redshifted 21 cm Power Spectra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.CO","authors_text":"A. A. Deshpande, A. de Oliveira-Costa, A. Ewall-Wice, A. Loeb, A. P. Beardsley, A. R. Neben, A. R. Offringa, A. Williams, B. J. Hazelton, B. McKinley, B. Pindor, C. J. Lonsdale, C. L. Williams, C. M. Trott, D. A. Mitchell, Daniel C. Jacobs, D. L. Kaplan, D. Oberoi, E. Lenc, E. Morgan, F. Briggs, G. Bernardi, Han-Seek Kim, I. S. Sullivan, J. C. Pober, J. Line, J. N. Hewitt, Joshua S. Dillon, J. Riding, J. S. B. Wyithe, Judd D. Bowman, K. S. Srivani, L. Feng, L. Hernquist, L. J. Greenhill, M. F. Morales, M. Johnston-Hollitt, M. Tegmark, N. Barry, N. Hurley-Walker, Nithyanandan Thyagarajan, N. Udaya Shankar, P. Carroll, P. Kittiwisit, P. Procopio, R. B. Wayth, R. J. Cappallo, R. L. Webster, R. Subrahmanyan, Shiv K. Sethi, S. J. Tingay, S. M. Ord, Sourabh Paul, S. R. McWhirter, T. Prabu","submitted_at":"2015-06-19T20:25:53Z","abstract_excerpt":"We confirm our recent prediction of the \"pitchfork\" foreground signature in power spectra of high-redshift 21 cm measurements where the interferometer is sensitive to large-scale structure on all baselines. This is due to the inherent response of a wide-field instrument and is characterized by enhanced power from foreground emission in Fourier modes adjacent to those considered to be the most sensitive to the cosmological H I signal. In our recent paper, many signatures from the simulation that predicted this feature were validated against Murchison Widefield Array (MWA) data, but this key pit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.06150","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"}