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A Framework for Interpreting Fast Radio Transients Search Experiments: Application to the V-FASTR Experiment

Trott, Cathryn M. and Tingay, Steven J. and Wayth, Randall B. and Thompson, David R. and Deller, Adam T. and Brisken, Walter F. and Wagstaff, Kiri L. and Majid, Walid A. and Burke-Spolaor, Sarah and Macquart, Jean-Pierre R. and Palaniswamy, Divya (2013) A Framework for Interpreting Fast Radio Transients Search Experiments: Application to the V-FASTR Experiment. Astrophysical Journal, 767 (1). Art. No. 4. ISSN 0004-637X. doi:10.1088/0004-637X/767/1/4.

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We define a framework for determining constraints on the detection rate of fast transient events from a population of underlying sources, with a view to incorporate beam shape, frequency effects, scattering effects, and detection efficiency into the metric. We then demonstrate a method for combining independent data sets into a single event rate constraint diagram, using a probabilistic approach to the limits on parameter space. We apply this new framework to present the latest results from the V-FASTR experiment, a commensal fast transients search using the Very Long Baseline Array (VLBA). In the 20 cm band, V-FASTR now has the ability to probe the regions of parameter space of importance for the observed Lorimer and Keane fast radio transient candidates by combining the information from observations with differing bandwidths, and properly accounting for the source dispersion measure, VLBA antenna beam shape, experiment time sampling, and stochastic nature of events. We then apply the framework to combine the results of the V-FASTR and Allen Telescope Array Fly's Eye experiments, demonstrating their complementarity. Expectations for fast transients experiments for the SKA Phase I dish array are then computed, and the impact of large differential bandwidths is discussed.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Thompson, David R.0000-0003-1100-7550
Deller, Adam T.0000-0001-9434-3837
Majid, Walid A.0000-0002-4694-4221
Burke-Spolaor, Sarah0000-0003-4052-7838
Macquart, Jean-Pierre R.0000-0001-6763-8234
Additional Information:© 2013 The American Astronomical Society. Received 2012 November 21; accepted 2013 January 24; published 2013 March 19. The Centre for All-sky Astrophysics is an Australian Research Council Centre of Excellence, funded by grant CE110001020. The International Centre for Radio Astronomy Research (ICRAR) is a Joint Venture between Curtin University and the University of Western Australia, funded by the State Government of Western Australia and the Joint Venture partners. S.J.T. is a Western Australian Premiers Research Fellow. R.B.W. is supported via the Western Australian Centre of Excellence in Radio Astronomy Science and Engineering. A.T.D. was supported by an NRAO Jansky Fellowship and an NWO Veni Fellowship. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the U.S. National Aeronautics and Space Administration. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. This research has made use of NASA's Astrophysics Data System. Facility: VLBA - Very Long Baseline Array.
Funding AgencyGrant Number
Australian Research CouncilCE110001020
State Government of Western AustraliaUNSPECIFIED
Joint Venture partnersUNSPECIFIED
Western Australian Centre of Excellence in Radio Astronomy Science and EngineeringUNSPECIFIED
National Radio Astronomy ObservatoryUNSPECIFIED
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
Subject Keywords:instrumentation: detectors – methods: data analysis – methods: observational – radio continuum: general – surveys
Issue or Number:1
Record Number:CaltechAUTHORS:20130212-145448100
Persistent URL:
Official Citation:Cathryn M. Trott et al 2013 ApJ 767 4
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36887
Deposited By: JoAnn Boyd
Deposited On:13 Feb 2013 19:44
Last Modified:09 Nov 2021 23:25

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