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The Murchison Widefield Array: the square kilometre array precursor at low radio frequencies

  • Steven John Tingay
  • , Robert F Goeke
  • , Judd D Bowman
  • , David Emrich
  • , Stephen M Ord
  • , Daniel A Mitchell
  • , Miguel F Morales
  • , Tom Booler
  • , Brian Crosse
  • , Randall B Wayth
  • , Colin J Lonsdale
  • , Steven Tremblay
  • , Dave Pallot
  • , Tim Colegate
  • , Andreas Wicenec
  • , Nadia Kudryavtseva
  • , Wayne Arcus
  • , David Graeme Barnes
  • , Gianni Bernardi
  • , Frank Briggs
  • Stephen M Burns, John Bunton, Roger Cappallo, Brian E Corey, Avinash Deshpande, Ludovico deSouza, Bryan Malcolm Gaensler, Lincoln Greenhill, Peter J Hall, Bryna J Hazelton, David Edwin Herne, Jacqueline N Hewitt, Melanie Johnston-Hollitt, David L Kaplan, Justin C Kasper, Barton B Kincaid, Ronald Koenig, Eric Kratzenberg, Mervyn John Lynch, Benjamin McKinley, Stephen Russell McWhirter, Edward H Morgan, Divya Oberoi, Joseph Pathikulangara, Thiagaraj Prabu, Ronald A Remillard, Alan E E Rogers, Anish A Roshi, Joseph E Salah, Robert John Sault, Natarajan Udaya-Shankar, Franz Schlagenhaufer, K S Srivani, James Stevens, Ravi Subrahmanyan, Mark F Waterson, Rachel Lindsey Webster, Alan R Whitney, Andrew J Williams, Christopher L Williams, J Stuart B Wyithe

Research output: Contribution to journalArticleResearchpeer-review

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.
Original languageEnglish
Article numbere007
Number of pages21
JournalPublications of the Astronomical Society of Australia
Volume30
DOIs
Publication statusPublished - 2013

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