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Title:
The Murchison Widefield Array: The Square Kilometre Array Precursor at Low Radio Frequencies
Authors:
Tingay, S. J.; Goeke, R.; Bowman, J. D.; Emrich, D.; Ord, S. M.; Mitchell, D. A.; Morales, M. F.; Booler, T.; Crosse, B.; Wayth, R. B.; Lonsdale, C. J.; Tremblay, S.; Pallot, D.; Colegate, T.; Wicenec, A.; Kudryavtseva, N.; Arcus, W.; Barnes, D.; Bernardi, G.; Briggs, F.; Burns, S.; Bunton, J. D.; Cappallo, R. J.; Corey, B. E.; Deshpande, A.; Desouza, L.; Gaensler, B. M.; Greenhill, L. J.; Hall, P. J.; Hazelton, B. J.; Herne, D.; Hewitt, J. N.; Johnston-Hollitt, M.; Kaplan, D. L.; Kasper, J. C.; Kincaid, B. B.; Koenig, R.; Kratzenberg, E.; Lynch, M. J.; Mckinley, B.; Mcwhirter, S. R.; Morgan, E.; Oberoi, D.; Pathikulangara, J.; Prabu, T.; Remillard, R. A.; Rogers, A. E. E.; Roshi, A.; Salah, J. E.; Sault, R. J.; Udaya-Shankar, N.; Schlagenhaufer, F.; Srivani, K. S.; Stevens, J.; Subrahmanyan, R.; Waterson, M.; Webster, R. L.; Whitney, A. R.; Williams, A.; Williams, C. L.; Wyithe, J. S. B.
Affiliation:
AA(ICRAR - Curtin University, Perth, Australia; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW, Australia), AB(MIT Kavli Institute for Astrophysics and Space Research, Cambridge, MA, USA ), AC(School of Earth and Space Exploration, Arizona State University, Tempe, AZ, USA), AD(ICRAR - Curtin University, Perth, Australia), AE(ICRAR - Curtin University, Perth, Australia), AF(ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW, Australia; School of Physics, The University of Melbourne, Melbourne, Australia), AG(Physics Department, University of Washington, Seattle, WA, USA), AH(ICRAR - Curtin University, Perth, Australia), AI(ICRAR - Curtin University, Perth, Australia), AJ(ICRAR - Curtin University, Perth, Australia; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW, Australia), AK(MIT Haystack Observatory, Westford, MA, USA), AL(ICRAR - Curtin University, Perth, Australia; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW, Australia), AM(ICRAR - Curtin University, Perth, Australia), AN(ICRAR - Curtin University, Perth, Australia), AO(ICRAR - University of Western Australia, Perth, Australia), AP(ICRAR - Curtin University, Perth, Australia), AQ(ICRAR - Curtin University, Perth, Australia), AR(Monash e-Research Centre, Monash University, Melbourne, Australia), AS(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA), AT(ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW, Australia; Research School of Astronomy and Astrophysics, The Australian National University, Canberra, Australia), AU(Burns Industries, Nashua, NH, USA), AV(CSIRO Astronomy and Space Science, Australia), AW(MIT Haystack Observatory, Westford, MA, USA), AX(MIT Haystack Observatory, Westford, MA, USA), AY(Raman Research Institute, Bangalore, India), AZ(CSIRO Astronomy and Space Science, Australia), BA(ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW, Australia; Sydney Institute for Astronomy, The University of Sydney, Sydney, Australia), BB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA), BC(ICRAR - Curtin University, Perth, Australia), BD(Physics Department, University of Washington, Seattle, WA, USA), BE(ICRAR - Curtin University, Perth, Australia), BF(MIT Kavli Institute for Astrophysics and Space Research, Cambridge, MA, USA), BG(School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand), BH(Physics Department, University of Wisconsin-Milwaukee, Milwaukee, WI, USA), BI(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA), BJ(MIT Haystack Observatory, Westford, MA, USA), BK(CSIRO Astronomy and Space Science, Australia), BL(MIT Haystack Observatory, Westford, MA, USA), BM(ICRAR - Curtin University, Perth, Australia), BN(ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW, Australia; Research School of Astronomy and Astrophysics, The Australian National University, Canberra, Australia), BO(MIT Haystack Observatory, Westford, MA, USA), BP(MIT Kavli Institute for Astrophysics and Space Research, Cambridge, MA, USA), BQ(National Centre for Radio Astrophysics, Pune, India), BR(CSIRO Astronomy and Space Science, Australia), BS(Raman Research Institute, Bangalore, India), BT(MIT Kavli Institute for Astrophysics and Space Research, Cambridge, MA, USA), BU(MIT Haystack Observatory, Westford, MA, USA), BV(National Radio Astronomy Observatory, Charlottesville, WV, USA), BW(MIT Haystack Observatory, Westford, MA, USA), BX(School of Physics, The University of Melbourne, Melbourne, Australia), BY(Raman Research Institute, Bangalore, India), BZ(ICRAR - Curtin University, Perth, Australia), CA(Raman Research Institute, Bangalore, India), CB(CSIRO Astronomy and Space Science, Australia), CC(ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW, Australia; Raman Research Institute, Bangalore, India), CD(ICRAR - Curtin University, Perth, Australia), CE(ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW, Australia; School of Physics, The University of Melbourne, Melbourne, Australia), CF(MIT Haystack Observatory, Westford, MA, USA), CG(ICRAR - University of Western Australia, Perth, Australia), CH(MIT Kavli Institute for Astrophysics and Space Research, Cambridge, MA, USA), CI(ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW, Australia; School of Physics, The University of Melbourne, Melbourne, Australia)
Publication:
Publications of the Astronomical Society of Australia, Volume 30, id.e007 21 pp. (PASA Homepage)
Publication Date:
01/2013
Origin:
CUP
Astronomy Keywords:
instrumentation: interferometers, techniques: image processing, techniques: interferometric, radio continuum: general, radio lines: general, early Universe
Abstract Copyright:
2013: Astronomical Society of Australia
DOI:
10.1017/pasa.2012.007
Bibliographic Code:
2013PASA...30....7T

Abstract

The Murchison Widefield Array (MWA) is one of three Square Kilometre Array Precursor telescopes and is located at the Murchison Radio-astronomy Observatory in the Murchison Shire of the mid-west of Western Australia, a location chosen for its extremely low levels of radio frequency interference. The MWA operates at low radio frequencies, 80-300 MHz, with a processed bandwidth of 30.72 MHz for both linear polarisations, and consists of 128 aperture arrays (known as tiles) distributed over a ~3-km diameter area. Novel hybrid hardware/software correlation and a real-time imaging and calibration systems comprise the MWA signal processing backend. In this paper, the as-built MWA is described both at a system and sub-system level, the expected performance of the array is presented, and the science goals of the instrument are summarised.
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