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Cambridge University Press (CUP), Publications of the Astronomical Society of Australia, (31), 2014
DOI: 10.1017/pasa.2014.40
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The Murchison Widefield Array Commissioning Survey: A Low-Frequency Catalogue of 14 110 Compact Radio Sources over 6 100 Square Degrees
,
John Morgan,
Randall B. Wayth ,
Paul J. Hancock ,
Martin E. Bell ,
Gianni Bernardi ,
Ramesh Bhat,
Frank Briggs,
Avinash A. Deshpande,
Aaron Ewall-Wice,
Lu Feng,
Bryna J. Hazelton,
Luke Hindson,
Daniel C. Jacobs,
David L. Kaplan
and other authors.
Full text: Unavailable
Abstract
AbstractWe present the results of an approximately 6 100 deg2 104–196 MHz radio sky survey performed with the Murchison Widefield Array during instrument commissioning between 2012 September and 2012 December: the MWACS. The data were taken as meridian drift scans with two different 32-antenna sub-arrays that were available during the commissioning period. The survey covers approximately 20.5 h < RA < 8.5 h, − 58° < Dec < −14°over three frequency bands centred on 119, 150 and 180 MHz, with image resolutions of 6–3 arcmin. The catalogue has 3 arcmin angular resolution and a typical noise level of 40 mJy beam− 1, with reduced sensitivity near the field boundaries and bright sources. We describe the data reduction strategy, based upon mosaicked snapshots, flux density calibration, and source-finding method. We present a catalogue of flux density and spectral index measurements for 14 110 sources, extracted from the mosaic, 1 247 of which are sub-components of complexes of sources.
