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dc.contributor.authorSokolowski, M.
dc.contributor.authorColegate, T.
dc.contributor.authorSutinjo, A. T.
dc.contributor.authorUng, D.
dc.contributor.authorWayth, R. B.
dc.contributor.authorHurley-Walker, N.
dc.contributor.authorLenc, E.
dc.contributor.authorPindor, B.
dc.contributor.authorMorgan, J.
dc.contributor.authorKaplan, David L.
dc.contributor.authorBell, M. E.
dc.contributor.authorCallingham, J. R.
dc.contributor.authorDwarakanath, K. S.
dc.contributor.authorFor, Bi-Qing
dc.contributor.authorGaensler, B. M.
dc.contributor.authorHancock, P. J.
dc.contributor.authorHindson, L.
dc.contributor.authorJohnston-Hollitt, M.
dc.contributor.authorKapińska, A. D.
dc.contributor.authorMcKinley, B.
dc.contributor.authorOffringa, A. R.
dc.contributor.authorProcopio, P.
dc.contributor.authorStaveley-Smith, L.
dc.contributor.authorWu, C.
dc.contributor.authorZheng, Q.
dc.date.accessioned2018-11-20T02:09:05Z
dc.date.available2018-11-20T02:09:05Z
dc.date.issued2017-11-27
dc.identifier.citationSokolowski , M , Colegate , T , Sutinjo , A T , Ung , D , Wayth , R B , Hurley-Walker , N , Lenc , E , Pindor , B , Morgan , J , Kaplan , D L , Bell , M E , Callingham , J R , Dwarakanath , K S , For , B-Q , Gaensler , B M , Hancock , P J , Hindson , L , Johnston-Hollitt , M , Kapińska , A D , McKinley , B , Offringa , A R , Procopio , P , Staveley-Smith , L , Wu , C & Zheng , Q 2017 , ' Calibration and Stokes Imaging with Full Embedded Element Primary Beam Model for the Murchison Widefield Array ' , Publications of the Astronomical Society of Australia , vol. 34 , e062 . https://doi.org/10.1017/pasa.2017.54
dc.identifier.issn1323-3580
dc.identifier.otherPURE: 12655637
dc.identifier.otherPURE UUID: cc55eea6-c65e-4b44-a277-686b21a481ac
dc.identifier.otherArXiv: http://arxiv.org/abs/1710.07478v1
dc.identifier.urihttp://hdl.handle.net/2299/20806
dc.description15 pages, 11 figures. Accepted for publication in PASA. © Astronomical Society of Australia 2017
dc.description.abstractThe Murchison Widefield Array (MWA), located in Western Australia, is one of the low-frequency precursors of the international Square Kilometre Array (SKA) project. In addition to pursuing its own ambitious science program, it is also a testbed for wide range of future SKA activities ranging from hardware, software to data analysis. The key science programs for the MWA and SKA require very high dynamic ranges, which challenges calibration and imaging systems. Correct calibration of the instrument and accurate measurements of source flux densities and polarisations require precise characterisation of the telescope's primary beam. Recent results from the MWA GaLactic Extragalactic All-sky MWA (GLEAM) survey show that the previously implemented Average Embedded Element (AEE) model still leaves residual polarisations errors of up to 10-20 % in Stokes Q. We present a new simulation-based Full Embedded Element (FEE) model which is the most rigorous realisation yet of the MWA's primary beam model. It enables efficient calculation of the MWA beam response in arbitrary directions without necessity of spatial interpolation. In the new model, every dipole in the MWA tile (4 x 4 bow-tie dipoles) is simulated separately, taking into account all mutual coupling, ground screen and soil effects, and therefore accounts for the different properties of the individual dipoles within a tile. We have applied the FEE beam model to GLEAM observations at 200 - 231 MHz and used false Stokes parameter leakage as a metric to compare the models. We have determined that the FEE model reduced the magnitude and declination-dependent behaviour of false polarisation in Stokes Q and V while retaining low levels of false polarisation in Stokes U.en
dc.language.isoeng
dc.relation.ispartofPublications of the Astronomical Society of Australia
dc.rightsEmbargoed
dc.subjectastro-ph.IM
dc.titleCalibration and Stokes Imaging with Full Embedded Element Primary Beam Model for the Murchison Widefield Arrayen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.identifier.urlhttps://arxiv.org/abs/1710.07478
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2017-11-27
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1017/pasa.2017.54
rioxxterms.licenseref.uriOther
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeEmbargoed


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