The Murchison Widefield Array: The Square Kilometre Array Precursor at Low Radio Frequencies

被引：991

作者：

Tingay, S. J. ^{[1
,2
]}

Goeke, R. ^{[3
]}

Bowman, J. D. ^{[4
]}

Emrich, D. ^{[1
]}

Ord, S. M. ^{[1
]}

Mitchell, D. A. ^{[2
,5
]}

Morales, M. F. ^{[6
]}

Booler, T. ^{[1
]}

Crosse, B. ^{[1
]}

Wayth, R. B. ^{[1
,2
]}

Lonsdale, C. J. ^{[7
]}

Tremblay, S. ^{[1
,2
]}

Pallot, D. ^{[1
]}

Colegate, T. ^{[1
]}

Wicenec, A. ^{[8
]}

Kudryavtseva, N. ^{[1
]}

Arcus, W. ^{[1
]}

Barnes, D. ^{[9
]}

Bernardi, G. ^{[10
]}

Briggs, F. ^{[2
,11
]}

Burns, S. ^{[12
]}

Bunton, J. D.

Cappallo, R. J. ^{[7
]}

Corey, B. E. ^{[7
]}

Deshpande, A. ^{[13
]}

Desouza, L.

Gaensler, B. M. ^{[2
,14
]}

Greenhill, L. J. ^{[10
]}

Hall, P. J. ^{[1
]}

Hazelton, B. J. ^{[6
]}

Herne, D. ^{[1
]}

Hewitt, J. N. ^{[3
]}

Johnston-Hollitt, M. ^{[15
]}

Kaplan, D. L. ^{[16
]}

Kasper, J. C. ^{[10
]}

Kincaid, B. B. ^{[7
]}

Koenig, R.

Kratzenberg, E. ^{[7
]}

Lynch, M. J. ^{[1
]}

Mckinley, B. ^{[2
,11
]}

Mcwhirter, S. R. ^{[7
]}

Morgan, E. ^{[3
]}

Oberoi, D. ^{[17
]}

Pathikulangara, J.

Prabu, T. ^{[13
]}

Remillard, R. A. ^{[3
]}

Rogers, A. E. E. ^{[7
]}

Roshi, A. ^{[18
]}

Salah, J. E. ^{[7
]}

Sault, R. J. ^{[5
]}

机构：

[1] Curtin Univ Technol, ICRAR, Perth, WA, Australia

[2] ARC Ctr Excellence All Sky Astrophys CAASTRO, Redfern, NSW, Australia

[3] MIT Kavli Inst Astrophys & Space Res, Cambridge, MA USA

[4] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ USA

[5] Univ Melbourne, Sch Phys, Melbourne, Vic, Australia

[6] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[7] MIT Haystack Observ, Westford, MA USA

[8] Univ Western Australia, ICRAR, Perth, WA 6009, Australia

[9] Monash Univ, Monash E Res Ctr, Melbourne, Vic 3004, Australia

[10] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[11] Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT, Australia

[12] Burns Ind, Nashua, NH USA

[13] Raman Res Inst, Bangalore 560080, Karnataka, India

[14] Univ Sydney, Sydney Inst Astron, Sydney, NSW 2006, Australia

[15] Victoria Univ Wellington, Sch Chem & Phys Sci, Wellington, New Zealand

[16] Univ Wisconsin, Dept Phys, Milwaukee, WI USA

[17] Natl Ctr Radio Astrophys, Pune, Maharashtra, India

[18] Natl Radio Astron Observ, Charlottesville, WV USA

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA | 2013年 / 30卷

基金：

美国国家科学基金会; 澳大利亚研究理事会;

关键词：

instrumentation: interferometers; techniques: image processing; techniques: interferometric-radio continuum: general; radio lines: general; early Universe; POINT SOURCES; SUBTRACTION; CALIBRATION; TRANSIENTS; SCIENCE; FIELDS; IMAGES;

D O I：

10.1017/pasa.2012.007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 similar to 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.

引用

页数：21

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