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First Season MWA EoR Power Spectrum Results at Redshift 7

Beardsley, A. P.; Hazelton, B; Sullivan, I S; Carroll, P; Barry, N; Rahimi, M.; Pindor, B.; Trott, C. M.; Line, J; Jacobs, Daniel C.; Morales, Miguel F; Pober, J. C.; Bernardi, G; Bowman, J D; Busch, M. P.; Briggs, Franklin; Waterson, Mark

Description

The Murchison Widefield Array (MWA) has collected hundreds of hours of Epoch of Reionization (EoR) data and now faces the challenge of overcoming foreground and systematic contamination to reduce the data to a cosmological measurement. We introduce several novel analysis techniques, such as cable reflection calibration, hyper-resolution gridding kernels, diffuse foreground model subtraction, and quality control methods. Each change to the analysis pipeline is tested against a two-dimensional...[Show more]

dc.contributor.authorBeardsley, A. P.
dc.contributor.authorHazelton, B
dc.contributor.authorSullivan, I S
dc.contributor.authorCarroll, P
dc.contributor.authorBarry, N
dc.contributor.authorRahimi, M.
dc.contributor.authorPindor, B.
dc.contributor.authorTrott, C. M.
dc.contributor.authorLine, J
dc.contributor.authorJacobs, Daniel C.
dc.contributor.authorMorales, Miguel F
dc.contributor.authorPober, J. C.
dc.contributor.authorBernardi, G
dc.contributor.authorBowman, J D
dc.contributor.authorBusch, M. P.
dc.contributor.authorBriggs, Franklin
dc.contributor.authorWaterson, Mark
dc.date.accessioned2018-11-29T22:52:26Z
dc.date.available2018-11-29T22:52:26Z
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1885/152169
dc.description.abstractThe Murchison Widefield Array (MWA) has collected hundreds of hours of Epoch of Reionization (EoR) data and now faces the challenge of overcoming foreground and systematic contamination to reduce the data to a cosmological measurement. We introduce several novel analysis techniques, such as cable reflection calibration, hyper-resolution gridding kernels, diffuse foreground model subtraction, and quality control methods. Each change to the analysis pipeline is tested against a two-dimensional power spectrum figure of merit to demonstrate improvement. We incorporate the new techniques into a deep integration of 32 hours of MWA data. This data set is used to place a systematic-limited upper limit on the cosmological power spectrum of ${{\rm{\Delta }}}^{2}\leqslant 2.7\times {10}^{4}$ mK2 at k = 0.27 h Mpc−1 and z = 7.1, consistent with other published limits, and a modest improvement (factor of 1.4) over previous MWA results. From this deep analysis, we have identified a list of improvements to be made to our EoR data analysis strategies. These improvements will be implemented in the future and detailed in upcoming publications
dc.format.mimetypeapplication/pdf
dc.publisherIOP Publishing
dc.sourceThe Astrophysical Journal
dc.titleFirst Season MWA EoR Power Spectrum Results at Redshift 7
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume833
dc.date.issued2016
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomy
local.identifier.ariespublicationa383154xPUB5433
local.type.statusPublished Version
local.contributor.affiliationBeardsley, A. P., Arizona State University
local.contributor.affiliationHazelton, B, University of Washington
local.contributor.affiliationSullivan, I S, University of Washington
local.contributor.affiliationCarroll, P, University of Washington
local.contributor.affiliationBarry, N, University of Washington
local.contributor.affiliationRahimi, M., ARC Centre of Excellence for All-sky Astrophysics (CAASTRO)
local.contributor.affiliationPindor, B., ARC Centre of Excellence for All-sky Astrophysics (CAASTRO),
local.contributor.affiliationTrott, C. M., Curtin University
local.contributor.affiliationLine, J, The University of Melbourne
local.contributor.affiliationJacobs, Daniel C., Arizona State University
local.contributor.affiliationMorales, Miguel F, University of Washington
local.contributor.affiliationPober, J. C., Brown University
local.contributor.affiliationBernardi, G, Harvard-Smithsonian Center for Astrophysics
local.contributor.affiliationBowman, J D, Arizona State University
local.contributor.affiliationBusch, M. P., Arizona State University
local.contributor.affiliationBriggs, Franklin, College of Science, ANU
local.contributor.affiliationWaterson, Mark, College of Science, ANU
local.bibliographicCitation.issue1
local.identifier.doi10.3847/1538-4357/833/1/102
dc.date.updated2018-11-29T07:46:00Z
local.identifier.scopusID2-s2.0-85006381038
local.identifier.thomsonID000390792000014
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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