Wide-field broad-band radio imaging with phased array feeds: A pilot multi-epoch continuum survey with ASKAP-BETA
dc.contributor.author | Heywood, I. | |
dc.contributor.author | Bannister, Keith | |
dc.contributor.author | Marvil, J. | |
dc.contributor.author | Allison, J.R. | |
dc.contributor.author | Ball, Lewis | |
dc.contributor.author | Bell, M. E. | |
dc.contributor.author | Bock, D. C.-J. | |
dc.contributor.author | Brothers, M. | |
dc.contributor.author | Bunton, J. D. | |
dc.contributor.author | Chippendale, A.P. | |
dc.contributor.author | McClure-Griffiths, Naomi | |
dc.contributor.author | Jackson, Carole | |
dc.contributor.author | Voronkov, M.A. | |
dc.date.accessioned | 2018-11-29T22:53:45Z | |
dc.date.available | 2018-11-29T22:53:45Z | |
dc.date.issued | 2016 | |
dc.date.updated | 2018-11-29T07:55:02Z | |
dc.description.abstract | The Boolardy Engineering Test Array is a 6 × 12 m dish interferometer and the prototype of the Australian Square Kilometre Array Pathfinder (ASKAP), equipped with the first generation of ASKAP's phased array feed (PAF) receivers. These facilitate rapid wide-area imaging via the deployment of simultaneous multiple beams within an ∼30 deg2 field of view. By cycling the array through 12 interleaved pointing positions and using nine digitally formed beams, we effectively mimic a traditional 1 h × 108 pointing survey, covering ∼150 deg2 over 711–1015 MHz in 12 h of observing time. Three such observations were executed over the course of a week. We verify the full bandwidth continuum imaging performance and stability of the system via self-consistency checks and comparisons to existing radio data. The combined three epoch image has arcminute resolution and a 1σ thermal noise level of 375 μJy beam−1, although the effective noise is a factor of ∼3 higher due to residual sidelobe confusion. From this we derive a catalogue of 3722 discrete radio components, using the 35 per cent fractional bandwidth to measure in-band spectral indices for 1037 of them. A search for transient events reveals one significantly variable source within the survey area. The survey covers approximately two-thirds of the Spitzer South Pole Telescope Deep Field. This pilot project demonstrates the viability and potential of using PAFs to rapidly and accurately survey the sky at radio wavelengths. | |
dc.format.mimetype | application/pdf | en_AU |
dc.identifier.issn | 0035-8711 | |
dc.identifier.uri | http://hdl.handle.net/1885/152562 | |
dc.publisher | Blackwell Publishing Ltd | |
dc.source | Monthly Notices of the Royal Astronomical Society | |
dc.title | Wide-field broad-band radio imaging with phased array feeds: A pilot multi-epoch continuum survey with ASKAP-BETA | |
dc.type | Journal article | |
dcterms.accessRights | Open Access | en_AU |
local.bibliographicCitation.issue | 4 | |
local.bibliographicCitation.lastpage | 4178 | |
local.bibliographicCitation.startpage | 4160 | |
local.contributor.affiliation | Heywood, I., Rhodes University | |
local.contributor.affiliation | Bannister, Keith, CSIRO Astronomy and Space Science | |
local.contributor.affiliation | Marvil, J., CSIRO Astronomy and Space Science (CASS) | |
local.contributor.affiliation | Allison, J.R., CSIRO Astronomy and Space Science (CASS) | |
local.contributor.affiliation | Ball, Lewis, CSIRO | |
local.contributor.affiliation | Bell, M. E., CSIRO Astronomy and Space Science | |
local.contributor.affiliation | Bock, D. C.-J., CSIRO Astronomy and Space Science (CASS) | |
local.contributor.affiliation | Brothers, M., CSIRO Astronomy and Space Science (CASS) | |
local.contributor.affiliation | Bunton, J. D., CSIRO Astronomy and Space Science | |
local.contributor.affiliation | Chippendale, A.P., CSIRO Astronomy and Space Science (CASS) | |
local.contributor.affiliation | McClure-Griffiths, Naomi, College of Science, ANU | |
local.contributor.affiliation | Jackson, Carole, College of Science, ANU | |
local.contributor.affiliation | Voronkov, M.A., CSIRO Astronomy and Space Science (CASS) | |
local.contributor.authoremail | u1000518@anu.edu.au | |
local.contributor.authoruid | McClure-Griffiths, Naomi, u1000518 | |
local.contributor.authoruid | Jackson, Carole, u9908169 | |
local.description.notes | Imported from ARIES | |
local.identifier.absfor | 091299 - Materials Engineering not elsewhere classified | |
local.identifier.absseo | 970102 - Expanding Knowledge in the Physical Sciences | |
local.identifier.ariespublication | u4105856xPUB25 | |
local.identifier.citationvolume | 457 | |
local.identifier.doi | 10.1093/mnras/stw186 | |
local.identifier.scopusID | 2-s2.0-84963818855 | |
local.identifier.thomsonID | 000373586000056 | |
local.identifier.uidSubmittedBy | u4105856 | |
local.type.status | Published Version |
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