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dc.contributor.authorOffringa, A.
dc.contributor.authorTrott, C.
dc.contributor.authorHurley-Walker, N.
dc.contributor.authorJohnston-Hollitt, M.
dc.contributor.authorMcKinley, B.
dc.contributor.authorBarry, N.
dc.contributor.authorBeardsley, A.
dc.contributor.authorBowman, J.
dc.contributor.authorBriggs, F.
dc.contributor.authorCarroll, P.
dc.contributor.authorDillon, J.
dc.contributor.authorEwall-Wice, A.
dc.contributor.authorFeng, L.
dc.contributor.authorGaensler, B.
dc.contributor.authorGreenhill, L.
dc.contributor.authorHazelton, B.
dc.contributor.authorHewitt, J.
dc.contributor.authorJacobs, D.
dc.contributor.authorKim, H.
dc.contributor.authorKittiwisit, P.
dc.contributor.authorLenc, E.
dc.contributor.authorLine, J.
dc.contributor.authorLoeb, A.
dc.contributor.authorMitchell, D.
dc.contributor.authorMorales, M.
dc.contributor.authorNeben, A.
dc.contributor.authorPaul, S.
dc.contributor.authorPindor, B.
dc.contributor.authorPober, J.
dc.contributor.authorProcopio, P.
dc.contributor.authorProcopio, J.
dc.contributor.authorSethi, S.
dc.contributor.authorShankar, N.
dc.contributor.authorSubrahmanyan, R.
dc.contributor.authorSullivan, I.
dc.contributor.authorTegmark, M.
dc.contributor.authorThyagarajan, N.
dc.contributor.authorTingay, Steven
dc.contributor.authorWayth, Randall
dc.contributor.authorWebster, R.
dc.contributor.authorWyithe, J.
dc.date.accessioned2017-01-30T11:35:13Z
dc.date.available2017-01-30T11:35:13Z
dc.date.created2016-05-08T19:30:24Z
dc.date.issued2016
dc.identifier.citationOffringa, A. and Trott, C. and Hurley-Walker, N. and Johnston-Hollitt, M. and McKinley, B. and Barry, N. and Beardsley, A. et al. 2016. Parametrizing Epoch of Reionization foregrounds: A deep survey of low-frequency point-source spectra with the Murchison Widefield Array. Monthly Notices of the Royal Astronomical Society. 458 (1): pp. 1057-1070.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/13150
dc.identifier.doi10.1093/mnras/stw310
dc.description.abstract

© 2016 The Authors. Experiments that pursue detection of signals from the Epoch of Reionization (EoR) are relying on spectral smoothness of source spectra at low frequencies. This article empirically explores the effect of foreground spectra on EoR experiments by measuring high-resolution full-polarization spectra for the 586 brightest unresolved sources in one of the Murchison Widefield Array (MWA) EoR fields using 45 h of observation. A novel peeling scheme is used to subtract 2500 sources from the visibilities with ionospheric and beam corrections, resulting in the deepest, confusion-limited MWA image so far. The resulting spectra are found to be affected by instrumental effects, which limit the constraints that can be set on source-intrinsic spectral structure. The sensitivity and power-spectrum of the spectra are analysed, and it is found that the spectra of residuals are dominated by point spread function sidelobes from nearby undeconvolved sources. We release a catalogue describing the spectral parameters for each measured source.

dc.publisherOxford University Press
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/DE140100316
dc.titleParametrizing Epoch of Reionization foregrounds: A deep survey of low-frequency point-source spectra with the Murchison Widefield Array
dc.typeJournal Article
dcterms.source.volume458
dcterms.source.number1
dcterms.source.startPage1057
dcterms.source.endPage1070
dcterms.source.issn0035-8711
dcterms.source.titleMonthly Notices of the Royal Astronomical Society
curtin.note

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, ©: 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

curtin.departmentCurtin Institute of Radio Astronomy (Physics)
curtin.accessStatusOpen access


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