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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 | Natasha Hurley-Walker
; 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 Nadia Kudryavtseva
; Emil Lenc
; Benjamin McKinley
; Daniel Mitchell
; Bart Pindor
; Pietro Procopio
; Divya Oberoi
; André Offringa
; Stephen Ord
; Jennifer Riding
; Judd D. Bowman
; Roger Cappallo
; Brian Corey
; David Emrich
; B. M. Gaensler
; Robert Goeke
; Lincoln Greenhill
; Jacqueline Hewitt
; Melanie Johnston-Hollitt
; Justin Kasper
; Eric Kratzenberg
; Colin Lonsdale
; Mervyn Lynch
; Russell McWhirter
; Miguel F. Morales
; Edward Morgan
; Thiagaraj Prabu
; Alan Rogers
; Anish Roshi
; Udaya Shankar
; K. Srivani
; Ravi Subrahmanyan
; Steven Tingay
; Mark Waterson
; Rachel Webster
; Alan Whitney
; Andrew Williams
; Chris Williams
; | Date: |
3 Oct 2014 | Abstract: | We present the results of an approximately 6,100 square degree 104--196MHz
radio sky survey performed with the Murchison Widefield Array during instrument
commissioning between 2012 September and 2012 December: the Murchison Widefield
Array Commissioning Survey (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 < Right Ascension
(RA) < 8.5 h, -58 deg < Declination (Dec) < -14 deg 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, with reduced sensitivity near the field boundaries and bright
sources. We describe the data reduction strategy, based upon mosaiced
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. | Source: | arXiv, 1410.0790 | Services: | Forum | Review | PDF | Favorites |
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