The Murchison Widefield Array Commissioning Survey: A Low-Frequency Catalogue of 14 110 Compact Radio Sources over 6 100 Square Degrees

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 deg2 104–196 MHz radio sky survey performed with the Murchison Widefield Array during instrument commissioning between 2012 September and 2012 December: theMWACS. The data were taken as meridian drift scans with two different 32-antenna sub-arrays tha...

Full description

Bibliographic Details
Main Authors: Hurley-Walker, Natasha, Morgan, John, Wayth, Randall, Hancock, Paul, Bell, M., BERNARDI, G., Bhat, Ramesh, Briggs, F., Deshpande, A., Ewall-Wice, A., Feng, L., Hazelton, B., Hindson, L., Jacobs, D., KAPLAN, D., Kudryavtseva, Nadia, Lenc, E., McKinley, B., Mitchell, D., Pindor, B., Procopio, P., Oberoi, D., Offringa, A., Ord, Stephen, Riding, J., Bowman, J., Cappallo, R., Corey, B., Emrich, David, Gaensler, B., Goeke, R., Greenhill, L., Hewitt, J., Johnston-Hollitt, M., Kasper, J., Kratzenberg, E., Lonsdale, C., Lynch, Mervyn, McWhirter, R., Morales, M., Morgan, E., Prabu, T., Rogers, A., Roshi, A., Shankar, U., Srivani, K., Subrahmanyan, R., Tingay, Steven, Waterson, Mark, Webster, R., Whitney, A., Williams, Andrew, Williams, C.
Format: Journal Article
Published: Cambridge University Press 2014
Subjects:
radio continuum: general
surveys
techniques: interferometric
Online Access:http://hdl.handle.net/20.500.11937/28870
Description
Summary: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: theMWACS. 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 centredon 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.

Similar Items