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dc.contributor.authorPindor, B.
dc.contributor.authorWyithe, J.
dc.contributor.authorMitchell, D.
dc.contributor.authorOrd, Stephen
dc.contributor.authorWayth, Randall
dc.contributor.authorGreenhill, L.
dc.date.accessioned2017-01-30T15:25:34Z
dc.date.available2017-01-30T15:25:34Z
dc.date.created2012-03-23T01:19:57Z
dc.date.issued2011
dc.identifier.citationPindor, B. and Wyithe, J.S.B. and Mitchell, D.A. and Ord, S.M. and Wayth, R.B. and Greenhill, L.J. 2011. Subtraction of Bright Point Sources from Synthesis Images of the Epoch of Reionization. Publications of the Astronomical Society of Australia. 28 (1): pp. 46-57.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/46168
dc.identifier.doi10.1071/AS10023
dc.description.abstract

Bright point sources associated with extragalactic active galactic nuclei and radio galaxies are an important foreground for low-frequency radio experiments aimed at detecting the redshifted 21-cm emission from neutral hydrogen during the epoch of reionization. The frequency dependence of the synthesized beam implies that the sidelobes of these sources will move across the field of view as a function of observing frequency, hence frustrating line-of-sight foreground subtraction techniques. We describe a method for subtracting these point sources from dirty maps produced by an instrument such as the MWA. This technique combines matched filters with an iterative centroiding scheme to locate and characterize point sources in the presence of a diffuse background. Simulations show that this technique can improve the dynamic range of epoch-of-reionization maps by 2–3 orders of magnitude.

dc.publisherCSIRO
dc.titleSubtraction of Bright Point Sources from Synthesis Images of the Epoch of Reionization
dc.typeJournal Article
dcterms.source.volume28
dcterms.source.number1
dcterms.source.startPage46
dcterms.source.endPage57
dcterms.source.issn1323-3580
dcterms.source.titlePublications of the Astronomical Society of Australia
curtin.note

Copyright © 2011 Astronomical Society of Australia

curtin.departmentCurtin Institute of Radio Astronomy
curtin.accessStatusOpen access via publisher


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