The Australian Square Kilometre Array Pathfinder: System Architecture and Specifications of the Boolardy Engineering Test Array

Hotan, A. W.; Bunton, John D.; Harvey-Smith, Lisa; Humphreys, B.; Jeffs, Brian D.; Shimwell, T. W.; Tuthill, J.; Voronkov, Maxim; Allen, G.; Amy, S. W.; Ardern, K.; Axtens, P.; Ball, Lewis; Bannister, K. W.; Barker, S.J.; Bateman, T.; Beresford, Ron; Bock, Douglas C.-J.; Bolton, R.; Bowen, Mark; Boyle, B.; Braun, Róbert; Broadhurst, S.; Brodrick, David; Brooks, Kate; Brown, Andrew; Cantrall, C.; Carrad, G. J.; Chapman, Jessica M.; Cheng, Wan; Chippendale, A. P.; Chung, Y.; Cooray, F. R.; Cornwell, T. J.; Davis, E. G.; Souza, Ludi De; DeBoer, David R.; Diamond, P. J.; Edwards, P. G.; Ekers, R. D.; Feain, Ilana; Ferris, Dick; Forsyth, R.; Gough, R. G.; Grancea, A.; Gupta, N.; Guzman, J. C.; Hampson, G.A.; Haskins, Christopher B.; Hay, Stuart G.; Hayman, Douglas B.; Hoyle, Simon; Jacka, C.; Jackson, C. A.; Jackson, Stuart D.; Jeganathan, K.; Johnston, S.; Joseph, J.; Kendall, Rodney; Kesteven, Michael; Kiraly, D.; Koribalski, B. S.; Leach, M.; Lenc, E.; Lensson, E.; Li, L.; Mackay, S.; Macleod, A.; Maher, Thomas G.; Marquarding, M.; McClure-Griffiths, N. M.; McConnell, D.; Mickle, S.; Mirtschin, P.; Norris, R. P.; Neuhold, S.; Ng, A.; O’Sullivan, John D.; Pathikulangara, J.; Pearce, Sarah E.; Phillips, Chris; Qiao, R. Y.; Reynolds, John; Rispler, Adrian; Roberts, P.; Roxby, Daniel N.; Schinckel, A. E. T.; Shaw, Robert D.; Shields, M.; Storey, Michelle C.; Sweetnam, T.; Troup, E. R.; Turner, B. E.; Tzioumis, A. K.; Westmeier, T.; Whiting, M. T.; Wilson, Carol; Wilson, Thomas L.; Wormnes, Kjetil; Wu, Xuanyi

doi:10.1017/pasa.2014.36

Cited by 127 publications

(85 citation statements)

References 36 publications

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“…9. The weights are calibrated using a maximum signal-to-noise (S/N) algorithm and the Sun as a reference source (Hotan et al 2014;McConnell et al 2016, and references therein). The observations were conducted in an eight-telescope fly's-eye mode, with each pointing in a different direction, yielding 8×36 beams on the sky.…”

Section: Data Capture and Processingmentioning

confidence: 99%

The Detection of an Extremely Bright Fast Radio Burst in a Phased Array Feed Survey

Bannister

Shannon

Macquart

et al. 2017

ApJL

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164

128

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We report the detection of an ultra-bright fast radio burst (FRB) from a modest, 3.4-day pilot survey with the Australian Square Kilometre Array Pathfinder. The survey was conducted in a wide-field fly's-eye configuration using the phased-array-feed technology deployed on the array to instantaneously observe an effective area of 160 deg 2 , and achieve an exposure totaling 13200 deg 2 hr . We constrain the position of FRB170107 to a region ¢´¢ 8 8 in size (90% containment) and its fluence to be 58±6 Jy ms. The spectrum of the burst shows a sharp cutoff above 1400 MHz, which could be due to either scintillation or an intrinsic feature of the burst. This confirms the existence of an ultra-bright (>20 Jy ms) population of FRBs.

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Section: Data Capture and Processingmentioning

confidence: 99%

The Detection of an Extremely Bright Fast Radio Burst in a Phased Array Feed Survey

Bannister

Shannon

Macquart

et al. 2017

ApJL

Self Cite

164

128

View full text Add to dashboard Cite

show abstract

“…This is about to change with the advent of new radio interferometers including the Australian Square Kilometre Array Pathfinder (ASKAP, Johnston et al 2008), the APERture Tile in Focus upgrade to the Westerbork Synthesis Telescope (APERTIF, Verheijen et al 2008) and the Karoo Array Telescope (MeerKAT, Jonas & MeerKAT Team 2016). ASKAP, which is fitted with phased array feed receivers (De-Boer et al 2009;Hampson et al 2012;Hotan et al 2014;Schinckel & Bock 2016), has a wide field of view giving it fast survey speed capabilities while retaining the increased resolution of an interferometer. The Widefield ASKAP Lband Legacy All-sky Blind Survey (WALLABY, Koribalski 2012, Koribalski et al in prep.…”

Section: Introductionmentioning

confidence: 99%

H i asymmetries in LVHIS, VIVA, and HALOGAS galaxies

Reynolds

Westmeier

Staveley‐Smith

et al. 2020

Monthly Notices of the Royal Astronomical Society

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We present an analysis of morphological, kinematic and spectral asymmetries in observations of atomic neutral hydrogen (H i) gas from the Local Volume H i Survey (LVHIS), the VLA Imaging of Virgo in Atomic Gas (VIVA) survey and the Hydrogen Accretion in Local Galaxies Survey (HALOGAS). With the aim of investigating the impact of the local environment density and stellar mass on the measured H i asymmetries in future large H i surveys, we provide recommendations for the most meaningful measures of asymmetry for use in future analysis. After controlling for stellar mass, we find signs of statistically significant trends of increasing asymmetries with local density. The most significant trend we measure is for the normalised flipped spectrum residual (A spec ), with mean LVHIS and VIVA values of 0.204 ± 0.011 and 0.615 ± 0.068 at average weighted 10 th nearest-neighbour galaxy number densities of log(ρ 10 /Mpc −3 ) = −1.64 and 0.88, respectively. Looking ahead to the WALLABY survey on the Australian Square Kilometre Array Pathfinder (ASKAP), we estimate that the number of detections will be sufficient to provide coverage over 5 orders of magnitude in both local density and stellar mass increasing the dynamic range and accuracy with which we can probe the effect of these properties on the asymmetry in the distribution of atomic gas in galaxies.

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“…The first interferometer to be designed specifically for phased-array feed technology is ASKAP at the Murchison Radio Observatory. The system has 36 dual-polarized beams operating in the 0.7-1.8 GHz band (Hay et al 2007;Hotan et al 2014). A 52-element phased array called APERTIF at 21-cm wavelength has been implemented on the Westerbork telescope (van Cappellen and Bakker 2010;van Cappellen et al 2011;and Ivashina et al 2011).…”

Section: Phased-array Feedsmentioning

confidence: 99%