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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Implementation of a direct-imaging and FX correlator for the BEST-2 array
Monthly Notices of the Royal Astronomical Society, Volume 439, No. 3, Year 2014
Notification
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Description
Anewdigital backend has been developed for the Basic Element for SKATraining II (BEST-2) array at Radiotelescopi di Medicina, INAF-IRA, Italy, which allows concurrent operation of an FX correlator, and a direct-imaging correlator and beamformer. This backend serves as a platform for testing some of the spatial Fourier transform concepts which have been proposed for use in computing correlations on regularly gridded arrays. While spatial Fourier transformbased beamformers have been implemented previously, this is, to our knowledge, the first time a direct-imaging correlator has been deployed on a radio astronomy array. Concurrent observations with the FX and direct-imaging correlator allow for direct comparison between the two architectures. Additionally, we show the potential of the direct-imaging correlator for time-domain astronomy, by passing a subset of beams though a pulsar and transient detection pipeline. These results provide a timely verification for spatial Fourier transformbased instruments that are currently in commissioning. These instruments aim to detect highly redshifted hydrogen from the epoch of reionization and/or to perform wide-field surveys for time-domain studies of the radio sky. We experimentally show the direct-imaging correlator architecture to be a viable solution for correlation and beamforming. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
Authors & Co-Authors
Foster, Griffin S.
United Kingdom, Oxford
University of Oxford
South Africa, Grahamstown
Rhodes University
Hickish, Jack
United Kingdom, Oxford
University of Oxford
Magro, Alessio
Malta, Msida
L-università Ta' Malta
Price, Danny C.
United Kingdom, Oxford
University of Oxford
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Zarb-Adami, Kristian
United Kingdom, Oxford
University of Oxford
South Africa, Grahamstown
Rhodes University
Statistics
Citations: 16
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1093/mnras/stu188
ISSN:
00358711
e-ISSN:
13652966
Study Design
Cross Sectional Study