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dc.contributor.authorPober, J. C.
dc.contributor.authorHazelton, B. J.
dc.contributor.authorBeardsley, A. P.
dc.contributor.authorBarry, N. A.
dc.contributor.authorMartinot, Z. E.
dc.contributor.authorSullivan, I. S.
dc.contributor.authorMorales, M. F.
dc.contributor.authorBell, M. E.
dc.contributor.authorBernardi, G.
dc.contributor.authorBhat, N. D. R.
dc.contributor.authorBowman, J. D.
dc.contributor.authorBriggs, F.
dc.contributor.authorCappallo, R. J.
dc.contributor.authorCarroll, P.
dc.contributor.authorCorey, B. E.
dc.contributor.authorOliveira-Costa, A. de
dc.contributor.authorDeshpande, A. A.
dc.contributor.authorDillon, Joshua S.
dc.contributor.authorEmrich, D.
dc.contributor.authorEwall-Wice, A. M.
dc.contributor.authorFeng, L.
dc.contributor.authorGoeke, R.
dc.contributor.authorGreenhill, L. J.
dc.contributor.authorHewitt, J. N.
dc.contributor.authorHindson, L.
dc.contributor.authorHurley-Walker, N.
dc.contributor.authorJacobs, D. C.
dc.contributor.authorJohnston-Hollitt, M.
dc.contributor.authorKaplan, D. L.
dc.contributor.authorKasper, J. C.
dc.contributor.authorKim, Han-Seek
dc.contributor.authorKittiwisit, P.
dc.contributor.authorKratzenberg, E.
dc.contributor.authorKudryavtseva, N.
dc.contributor.authorLenc, E.
dc.contributor.authorLine, J.
dc.contributor.authorLoeb, A.
dc.contributor.authorLonsdale, C. J.
dc.contributor.authorLynch, M. J.
dc.contributor.authorMcKinley, B.
dc.contributor.authorMcWhirter, S. R.
dc.contributor.authorMitchell, D. A.
dc.contributor.authorMorgan, E.
dc.contributor.authorNeben, A. R.
dc.contributor.authorOberoi, D.
dc.contributor.authorOffringa, A. R.
dc.contributor.authorOrd, S. M.
dc.contributor.authorPaul, Sourabh
dc.contributor.authorPindor, B.
dc.contributor.authorPrabu, T.
dc.contributor.authorProcopio, P.
dc.contributor.authorRiding, J.
dc.contributor.authorRogers, A. E. E.
dc.contributor.authorRoshi, A.
dc.contributor.authorSethi, Shiv K.
dc.contributor.authorShankar, N. Udaya
dc.contributor.authorSrivani, K. S.
dc.contributor.authorSubrahmanyan, R.
dc.contributor.authorTegmark, M.
dc.contributor.authorThyagarajan, Nithyanandan
dc.contributor.authorTingay, S. J.
dc.contributor.authorTrott, C. M.
dc.contributor.authorWaterson, M.
dc.contributor.authorWayth, R. B.
dc.contributor.authorWebster, R. L.
dc.contributor.authorWhitney, A. R.
dc.contributor.authorWilliams, A.
dc.contributor.authorWilliams, C. L.
dc.contributor.authorWyithe, J. S. B.
dc.date.accessioned2017-01-11T20:26:36Z
dc.date.available2017-01-11T20:26:36Z
dc.date.issued2016-03-01
dc.identifier.citationPober , J C , Hazelton , B J , Beardsley , A P , Barry , N A , Martinot , Z E , Sullivan , I S , Morales , M F , Bell , M E , Bernardi , G , Bhat , N D R , Bowman , J D , Briggs , F , Cappallo , R J , Carroll , P , Corey , B E , Oliveira-Costa , A D , Deshpande , A A , Dillon , J S , Emrich , D , Ewall-Wice , A M , Feng , L , Goeke , R , Greenhill , L J , Hewitt , J N , Hindson , L , Hurley-Walker , N , Jacobs , D C , Johnston-Hollitt , M , Kaplan , D L , Kasper , J C , Kim , H-S , Kittiwisit , P , Kratzenberg , E , Kudryavtseva , N , Lenc , E , Line , J , Loeb , A , Lonsdale , C J , Lynch , M J , McKinley , B , McWhirter , S R , Mitchell , D A , Morgan , E , Neben , A R , Oberoi , D , Offringa , A R , Ord , S M , Paul , S , Pindor , B , Prabu , T , Procopio , P , Riding , J , Rogers , A E E , Roshi , A , Sethi , S K , Shankar , N U , Srivani , K S , Subrahmanyan , R , Tegmark , M , Thyagarajan , N , Tingay , S J , Trott , C M , Waterson , M , Wayth , R B , Webster , R L , Whitney , A R , Williams , A , Williams , C L & Wyithe , J S B 2016 , ' The Importance of Wide-field Foreground Removal for 21 cm Cosmology : A Demonstration With Early MWA Epoch of Reionization Observations ' , The Astrophysical Journal , vol. 819 , no. 8 . https://doi.org/10.3847/0004-637X/819/1/8
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 10290967
dc.identifier.otherPURE UUID: 42a99686-dbdf-49c7-8034-2e49e05bdfcd
dc.identifier.otherArXiv: http://arxiv.org/abs/1601.06177v1
dc.identifier.otherScopus: 84961173489
dc.identifier.urihttp://hdl.handle.net/2299/17488
dc.descriptionThis article was accepted for publication in The Astrophysical Journal, J. C. Pober et al, 'The Importance of Wide-field Foreground Removal for 21 cm Cosmology: A Demonstration With Early MWA Epoch of Reionization Observations' 819:8 (13pp), 2016 March 1,The Version of Record is available online at DOI: 10.3847/0004-637X/819/1/8 © 2016. The American Astronomical Society. All rights reserved.
dc.description.abstractIn this paper we present observations, simulations, and analysis demonstrating the direct connection between the location of foreground emission on the sky and its location in cosmological power spectra from interferometric redshifted 21 cm experiments. We begin with a heuristic formalism for understanding the mapping of sky coordinates into the cylindrically averaged power spectra measurements used by 21 cm experiments, with a focus on the effects of the instrument beam response and the associated sidelobes. We then demonstrate this mapping by analyzing power spectra with both simulated and observed data from the Murchison Widefield Array. We find that removing a foreground model which includes sources in both the main field-of-view and the first sidelobes reduces the contamination in high k_parallel modes by several percent relative to a model which only includes sources in the main field-of-view, with the completeness of the foreground model setting the principal limitation on the amount of power removed. While small, a percent-level amount of foreground power is in itself more than enough to prevent recovery of any EoR signal from these modes. This result demonstrates that foreground subtraction for redshifted 21 cm experiments is truly a wide-field problem, and algorithms and simulations must extend beyond the main instrument field-of-view to potentially recover the full 21 cm power spectrum.en
dc.format.extent13
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.rights/dk/atira/pure/core/openaccesspermission/open
dc.subjectastro-ph.IM
dc.subjectastro-ph.CO
dc.subjectcosmology: observations - dark ages, reionization, first stars
dc.subjecttechniques: interferometric
dc.titleThe Importance of Wide-field Foreground Removal for 21 cm Cosmology : A Demonstration With Early MWA Epoch of Reionization Observationsen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2016-01-13
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.3847/0004-637X/819/1/8
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeopenAccess


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