Australian square kilometre array pathfinder: I. system description

Hotan, A. W.; Bunton, J. D.; Chippendale, A. P.; Whiting, M.; Tuthill, J.; Moss, V. A.; McConnell, D; Amy, S. W.; Huynh, M. T.; Allison, J. R.; Anderson, C. S.; Bannister, K. W.; Bastholm, E.; Beresford, R; Bock, D. C.-J.; Bolton, R; Chapman, J. M.; Chow, K.; Collier, J. D.; Cooray, F. R.; Cornwell, T. J.; Diamond, P. J.; Edwards, P. G.; Feain, I. J.; Franzen, T. M. O.; George, D.; Gupta, N.; Hampson, G. A.; Harvey-Smith, L.; Hayman, D. B.; Heywood, I.; Jacka, C.; Jackson, C. A.; Jackson, S.; Jeganathan, K.; Johnston, S.; Kesteven, M.; Kleiner, D.; Koribalski, B. S.; Lee-Waddell, K.; Lenc, E.; Lensson, E. S.; Mackay, S.; Mahony, E. K.; McClure-Griffiths, N. M.; McConigley, R; Mirtschin, P; Ng, A K; Norris, R. P.; Pearce, S E; Phillips, C.; Pilawa, M. A.; Raja, W.; Reynolds, J. E.; Roberts, P.; Roxby, D. N.; Sadler, E. M.; Shields, M.; Schinckel, A. E. T.; Serra, P; Shaw, R. D.; Sweetnam, T.; Troup, E. R.; Tzioumis, A.; Voronkov, M. A.; Westmeier, T.

doi:10.1017/pasa.2021.1

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Australian square kilometre array pathfinder: I. system description

Author(s): A. W. Hotan , J. D. Bunton , A. P. Chippendale , M. Whiting , J. Tuthill , V. A. Moss , D. McConnell , S. W. Amy , M. T. Huynh , J. R. Allison , C. S. Anderson , K. W. Bannister , E. Bastholm , R. Beresford , D. C.-J. Bock , R. Bolton , J. M. Chapman , K. Chow , J. D. Collier , F. R. Cooray , T. J. Cornwell , P. J. Diamond , P. G. Edwards , I. J. Feain , T. M. O. Franzen , D. George , N. Gupta , G. A. Hampson , L. Harvey-Smith , D. B. Hayman , I. Heywood , C. Jacka , C. A. Jackson , S. Jackson , K. Jeganathan , S. Johnston , M. Kesteven , D. Kleiner , B. S. Koribalski , K. Lee-Waddell , E. Lenc , E. S. Lensson , S. Mackay , E. K. Mahony , N. M. McClure-Griffiths , R. McConigley , P. Mirtschin , A. K. Ng , R. P. Norris , S. E. Pearce , C. Phillips , M. A. Pilawa , W. Raja , J. E. Reynolds , P. Roberts , D. N. Roxby , E. M. Sadler , M. Shields , A. E. T. Schinckel , P. Serra , R. D. Shaw , T. Sweetnam , E. R. Troup , A. Tzioumis , M. A. Voronkov , T. Westmeier

Publication date Created: 2021

Publication date (Electronic): March 05 2021

Journal: Publications of the Astronomical Society of Australia

Publisher: Cambridge University Press (CUP)

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Abstract

In this paper, we describe the system design and capabilities of the Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope at the conclusion of its construction project and commencement of science operations. ASKAP is one of the first radio telescopes to deploy phased array feed (PAF) technology on a large scale, giving it an instantaneous field of view that covers $31\,\textrm{deg}^{2}$ at $800\,\textrm{MHz}$. As a two-dimensional array of 36 $\times$12 m antennas, with baselines ranging from 22 m to 6 km, ASKAP also has excellent snapshot imaging capability and 10 arcsec resolution. This, combined with 288 MHz of instantaneous bandwidth and a unique third axis of rotation on each antenna, gives ASKAP the capability to create high dynamic range images of large sky areas very quickly. It is an excellent telescope for surveys between 700 and $1800\,\textrm{MHz}$ and is expected to facilitate great advances in our understanding of galaxy formation, cosmology, and radio transients while opening new parameter space for discovery of the unknown.