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Title:
The performance and calibration of the CRAFT fly's eye fast radio burst survey
Authors:
James, C. W.; Bannister, K. W.; Macquart, J.-P.; Ekers, R. D.; Oslowski, S.; Shannon, R. M.; Allison, J. R.; Chippendale, A. P.; Collier, J. D.; Franzen, T.; Hotan, A. W.; Leach, M.; McConnell, D.; Pilawa, M. A.; Voronkov, M. A.; Whiting, M. T.
Affiliation:
AA(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia; Australian Research Council (ARC) Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia 0000-0002-6437-6176), AB(Australia Telescope National Facility, CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710, Australia), AC(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia; Australian Research Council (ARC) Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia), AD(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia; Australia Telescope National Facility, CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710, Australia), AE(Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 3122, Australia), AF(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia; Australian Research Council (ARC) Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia; Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 3122, Australia), AG(Sub-Department of Astrophysics, Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Rd., Oxford OX1 3RH, UK), AH(Australia Telescope National Facility, CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710, Australia 0000-0002-0639-6291), AI(Australia Telescope National Facility, CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710, Australia; School of Computing, Engineering, and Mathematics, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia), AJ(CSIRO Astronomy and Space Science, Australia Telescope National Facility, P.O. Box 1130, Bentley, WA 6102, Australia), AK(CSIRO Astronomy and Space Science, Australia Telescope National Facility, P.O. Box 1130, Bentley, WA 6102, Australia), AL(Australia Telescope National Facility, CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710, Australia), AM(Australia Telescope National Facility, CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710, Australia), AN(Australia Telescope National Facility, CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710, Australia), AO(Australia Telescope National Facility, CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710, Australia), AP(Australia Telescope National Facility, CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710, Australia 0000-0003-1160-2077)
Publication:
Publications of the Astronomical Society of Australia, Volume 36, id. e009 (PASA Homepage)
Publication Date:
02/2019
Origin:
CUP
Astronomy Keywords:
methods: data analysis, telescopes, surveys
Abstract Copyright:
2019: Astronomical Society of Australia
DOI:
10.1017/pasa.2019.1
Bibliographic Code:
2019PASA...36....9J

Abstract

The Commensal Real-time Australian Square Kilometre Array Pathfinder Fast Transients survey is the first extensive astronomical survey using phased array feeds. Since January 2017, it has been searching for fast radio bursts in fly's eye mode. Here, we present a calculation of the sensitivity and total exposure of the survey that detected the first 20 of these bursts, using the pulsars B1641-45 and B0833-45 as calibrators. The beamshape, antenna-dependent system noise, and the effects of radio-frequency interference and fluctuations during commissioning are quantified. Effective survey exposures and sensitivities are calculated as a function of the source counts distribution. Statistical `stat' and systematics `sys' effects are treated separately. The implied fast radio burst rate is significantly lower than the 37 sky-1 day-1 calculated using nominal exposures and sensitivities for this same sample by Shannon et al. (2018). At the Euclidean (best-fit) power-law index of -1.5 (-2.2), the rate is (sys) ± 3.6 (stat) sky-1 day-1 ( (sys) ± 2.8 (stat) sky-1 day-1) above a threshold of 56.6 ± 6.6(sys) Jy ms (40.4 ± 1.2(sys) Jy ms). This strongly suggests that these calculations be performed for other FRB-hunting experiments, allowing meaningful comparisons to be made between them.

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