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Title: The Murchison Widefield Array Commissioning Survey: A Low-Frequency Catalogue of 14 110 Compact Radio Sources over 6 100 Square Degrees
Authors: Hurley-Walker, N.
Deshpande, A.A.
Prabu, T.
Udaya Shankar, N.
Srivani, K.S.
Subrahmanyan, Ravi
+25 Co-authors
Keywords: interferometric
Radio continuum
Issue Date: 22-Dec-2014
Publisher: Cambridge University Press for Astronomical Society of Australia
Citation: Publications of the Astronomical Society of Australia,2014,Vol.31, e045
Abstract: We 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.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 1323-3580
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Copyright: 2014 Astronomical Society of Japan
Appears in Collections:Research Papers (A&A)

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