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Interferometric Imaging with the 32 Element Murchison Wide-Field Array

Ord, S. M. and Bowman, J. D. (2010) Interferometric Imaging with the 32 Element Murchison Wide-Field Array. Publications of the Astronomical Society of the Pacific, 122 (897). pp. 1353-1366. ISSN 0004-6280.

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The Murchison Wide-Field Array (MWA) is a low-frequency radio telescope, currently under construction, intended to search for the spectral signature of the epoch of reionization (EOR) and to probe the structure of the solar corona. Sited in western Australia, the full MWA will comprise 8192 dipoles grouped into 512 tiles and will be capable of imaging the sky south of 40° declination, from 80 MHz to 300 MHz with an instantaneous field of view that is tens of degrees wide and a resolution of a few arcminutes. A 32 station prototype of the MWA has been recently commissioned and a set of observations has been taken that exercise the whole acquisition and processing pipeline. We present Stokes I, Q, and U images from two ~4 hr integrations of a field 20° wide centered on Pictoris A. These images demonstrate the capacity and stability of a real-time calibration and imaging technique employing the weighted addition of warped snapshots to counter extreme wide-field imaging distortions.

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Additional Information:© Astronomical Society of the Pacific. Received 2010 July 17; accepted 2010 September 03; published 2010 October 6. This work uses data obtained from the Murchison Radio- Astronomy Observatory. We acknowledge the Wajarri Yamatji people as the traditional owners of the Observatory site. Support came from the U.S. National Science Foundation (grants AST-0457585 and PHY-0835713), the Australian Research Council (grants LE0775621 and LE0882938), the U.S. Air Force Office of Scientific Research (grant FA9550-0510247), the Smithsonian Astrophysical Observatory, the MIT School of Science, the Raman Research Institute, the Australian National University, the iVEC Petabyte Data Store, the Initiative in Innovative Computing and NVIDIA-sponsored Center for Excellence at Harvard, and the International Centre for Radio Astronomy Research, a Joint Venture of Curtin University of Technology and The University ofWestern Australia, funded by the Western Australian State government.
Funding AgencyGrant Number
NSFAST- 0457585
Australian Research CouncilLE0775621
Australian Research CouncilLE0882938
Air Force Office of Scientific Research (AFOSR)FA9550-0510247
Smithsonian Astrophysical ObservatoryUNSPECIFIED
MIT School of ScienceUNSPECIFIED
Raman Research InstituteUNSPECIFIED
Australian National UniversityUNSPECIFIED
iVEC Petabyte Data StoreUNSPECIFIED
Harvard UniversityUNSPECIFIED
Western Australian State governmentUNSPECIFIED
Issue or Number:897
Record Number:CaltechAUTHORS:20101201-100939498
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Official Citation:Interferometric Imaging with the 32 Element Murchison Wide-Field Array S. M. Ord, D. A. Mitchell, R. B. Wayth, L. J. Greenhill, G. Bernardi, S. Gleadow, R. G. Edgar, M. A. Clark, G. Allen, W. Arcus, L. Benkevitch, J. D. Bowman, F. H. Briggs, J. D. Bunton, S. Burns, R. J. Cappallo, W. A. Coles, B. E. Corey, L. deSouza, S. S. Doeleman, M. Derome, A. Deshpande, D. Emrich, R. Goeke, M. R. Gopalakrishna, D. Herne, J. N. Hewitt, P. A. Kamini, D. L. Kaplan, J. C. Kasper, B. B. Kincaid, J. Kocz, E. Kowald, E. Kratzenberg, D. Kumar, C. J. Lonsdale, M. J. Lynch, S. R. McWhirter, S. Madhavi, M. Matejek, M. F. Morales, E. Morgan, D. Oberoi, J. Pathikulangara, T. Prabu, A. E. E. Rogers, A. Roshi, J. E. Salah, A. Schinkel, N. Udaya Shankar, K. S. Srivani, J. Stevens, S. J. Tingay, A. Vaccarella, M. Waterson, R. L. Webster, A. R. Whitney, A. Williams, and C. Williams Publications of the Astronomical Society of the Pacific 2010 122:897, 1353-1366
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21092
Deposited By: Jason Perez
Deposited On:06 Dec 2010 20:23
Last Modified:03 Oct 2019 02:19

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