The Murchison Widefield Array Commissioning Survey: A Low-Frequency Catalogue of 14,110 Compact Radio Sources over 6,100 Square Degrees
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 meridi...
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| creator | Hurley-Walker, Natasha Morgan, John Wayth, Randall B Hancock, Paul J Bell, Martin E Bernardi, Gianni Bhat, Ramesh Briggs, Frank Deshpande, Avinash A Ewall-Wice, Aaron Lu, Feng Hazelton, Bryna J Hindson, Luke Jacobs, Daniel C David L Kaplan Nadia Kudryavtseva Lenc, Emil McKinley, Benjamin Mitchell, Daniel Pindor, Bart Procopio, Pietro Oberoi, Divya Offringa, André Ord, Stephen Riding, Jennifer Bowman, Judd D Cappallo, Roger Corey, Brian Emrich, David Gaensler, B M Goeke, Robert Greenhill, Lincoln Hewitt, Jacqueline Johnston-Hollitt, Melanie Kasper, Justin Kratzenberg, Eric Lonsdale, Colin Lynch, Mervyn McWhirter, Russell Morales, Miguel F Morgan, Edward Prabu, Thiagaraj Rogers, Alan Roshi, Anish Shankar, Udaya Srivani, K Subrahmanyan, Ravi Tingay, Steven Waterson, Mark Webster, Rachel Whitney, Alan Williams, Andrew Williams, Chris |
| description | 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. |
| doi_str_mv | 10.48550/arxiv.1410.0790 |
| format | Article |
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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><subject>Angular resolution</subject><subject>Antenna arrays</subject><subject>Commissioning</subject><subject>Data reduction</subject><subject>Declination</subject><subject>Flux density</subject><subject>Frequencies</subject><subject>Physics - Instrumentation and Methods for Astrophysics</subject><subject>Sky surveys 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| subjects | Angular resolution Antenna arrays Commissioning Data reduction Declination Flux density Frequencies Physics - Instrumentation and Methods for Astrophysics Sky surveys (astronomy) |
| title | The Murchison Widefield Array Commissioning Survey: A Low-Frequency Catalogue of 14,110 Compact Radio Sources over 6,100 Square Degrees |
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