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dc.contributor.authorYoshiura, S.
dc.contributor.authorPindor, B.
dc.contributor.authorLine, J.L.B.
dc.contributor.authorBarry, Nichole
dc.contributor.authorTrott, Cathryn
dc.contributor.authorBeardsley, A.
dc.contributor.authorBowman, J.
dc.contributor.authorByrne, R.
dc.contributor.authorChokshi, A.
dc.contributor.authorHazelton, B.J.
dc.contributor.authorHasegawa, K.
dc.contributor.authorHoward, E.
dc.contributor.authorGreig, B.
dc.contributor.authorJacobs, D.
dc.contributor.authorJordan, Chris
dc.contributor.authorJoseph, R.
dc.contributor.authorKolopanis, M.
dc.contributor.authorLynch, Christene
dc.contributor.authorMcKinley, Ben
dc.contributor.authorMitchell, D.A.
dc.contributor.authorMorales, M.F.
dc.contributor.authorMurray, Steven
dc.contributor.authorPober, J.C.
dc.contributor.authorRahimi, M.
dc.contributor.authorTakahashi, K.
dc.contributor.authorTingay, Steven
dc.contributor.authorWayth, Randall
dc.contributor.authorWebster, R.L.
dc.contributor.authorWilensky, M.
dc.contributor.authorWyithe, J.S.B.
dc.contributor.authorZhang, Z.
dc.contributor.authorZheng, Q.
dc.date.accessioned2023-04-19T07:39:17Z
dc.date.available2023-04-19T07:39:17Z
dc.date.issued2021
dc.identifier.citationYoshiura, S. and Pindor, B. and Line, J.L.B. and Barry, N. and Trott, C.M. and Beardsley, A. and Bowman, J. et al. 2021. A new MWA limit on the 21 cm power spectrum at redshifts ∼13-17. Monthly Notices of the Royal Astronomical Society. 505 (4): pp. 4775-4790.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/91573
dc.identifier.doi10.1093/mnras/stab1560
dc.description.abstract

Observations in the lowest Murchison Widefield Array (MWA) band between 75 and 100 MHz have the potential to constrain the distribution of neutral hydrogen in the intergalactic medium at redshift ∼13-17. Using 15 h of MWA data, we analyse systematics in this band such as radio-frequency interference (RFI), ionospheric and wide field effects. By updating the position of point sources, we mitigate the direction-independent calibration error due to ionospheric offsets. Our calibration strategy is optimized for the lowest frequency bands by reducing the number of direction-dependent calibrators and taking into account radio sources within a wider field of view. We remove data polluted by systematics based on the RFI occupancy and ionospheric conditions, finally selecting 5.5 h of the cleanest data. Using these data, we obtain 2σ upper limits on the 21 cm power spectrum in the range of 0.1 h Mpc-1 ≲ k ≲ 1 h Mpc-1 and at z = 14.2, 15.2, and 16.5, with the lowest limit being 6.3 × 106 mK2 at k=0.14 h Mpc-1 and at z = 15.2 with a possibility of a few per cent of signal loss due to direction-independent calibration.

dc.languageEnglish
dc.publisherOXFORD UNIV PRESS
dc.relation.urihttp://dx.doi.org/10.1093/mnras/stab1560
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/CE170100013
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/DE140100316
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/CE110001020
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectAstronomy & Astrophysics
dc.subjectmethods: data analysis
dc.subjectdark ages, reionization, first stars
dc.subjectMURCHISON WIDEFIELD ARRAY
dc.subjectCOSMIC DAWN
dc.subjectFUNDAMENTAL LIMITATIONS
dc.subjectNEUTRAL HYDROGEN
dc.subjectLIGHT-CONE
dc.subjectEPOCH
dc.subjectREIONIZATION
dc.subjectCALIBRATION
dc.subjectSIGNAL
dc.subjectLOFAR
dc.subjectastro-ph.CO
dc.subjectastro-ph.CO
dc.titleA new MWA limit on the 21 cm power spectrum at redshifts ∼13-17
dc.typeJournal Article
dcterms.source.volume505
dcterms.source.number4
dcterms.source.startPage4775
dcterms.source.endPage4790
dcterms.source.issn0035-8711
dcterms.source.titleMonthly Notices of the Royal Astronomical Society
dc.date.updated2023-04-19T07:39:15Z
curtin.note

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. ©: 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

curtin.departmentSchool of Elec Eng, Comp and Math Sci (EECMS)
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidWayth, Randall [0000-0002-6995-4131]
curtin.contributor.orcidTrott, Cathryn [0000-0001-6324-1766]
curtin.contributor.orcidJordan, Chris [0000-0002-1220-2940]
curtin.contributor.orcidTingay, Steven [0000-0002-8195-7562]
curtin.contributor.orcidBarry, Nichole [0000-0003-2064-6979]
curtin.contributor.orcidLynch, Christene [0000-0002-0494-192X]
curtin.contributor.orcidMcKinley, Ben [0000-0002-9006-1450]
curtin.contributor.researcheridTrott, Cathryn [B-5325-2013]
curtin.contributor.researcheridTingay, Steven [B-5271-2013]
curtin.contributor.researcheridMurray, Steven [K-8771-2017]
dcterms.source.eissn1365-2966
curtin.contributor.scopusauthoridWayth, Randall [8533270000]
curtin.contributor.scopusauthoridTrott, Cathryn [24438609500]
curtin.contributor.scopusauthoridJordan, Chris [37118932200]
curtin.contributor.scopusauthoridTingay, Steven [7004903117]
curtin.contributor.scopusauthoridMurray, Steven [55822699100]
curtin.contributor.scopusauthoridLynch, Christene [56927637600]
curtin.contributor.scopusauthoridMcKinley, Ben [55532876300]
curtin.repositoryagreementV3


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