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Cambridge University Press (CUP), Publications of the Astronomical Society of Australia, (30), 2013

DOI: 10.1017/pasa.2012.006

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VAST: An ASKAP Survey for Variables and Slow Transients

Journal article published in 2013 by Tara Murphy ORCID, Shami Chatterjee ORCID, David L. Kaplan, Jay Banyer, Martin E. Bell ORCID, Hayley E. Bignall, Geoffrey C. Bower ORCID, Robert A. Cameron, David M. Coward, James M. Cordes, Steve Croft ORCID, James R. Curran, S. G. Djorgovski, Sean A. Farrell, Dale A. Frail and other authors.
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

AbstractThe Australian Square Kilometre Array Pathfinder (ASKAP) will give us an unprecedented opportunity to investigate the transient sky at radio wavelengths. In this paper we present VAST, an ASKAP survey for Variables and Slow Transients. VAST will exploit the wide-field survey capabilities of ASKAP to enable the discovery and investigation of variable and transient phenomena from the local to the cosmological, including flare stars, intermittent pulsars, X-ray binaries, magnetars, extreme scattering events, interstellar scintillation, radio supernovae, and orphan afterglows of gamma-ray bursts. In addition, it will allow us to probe unexplored regions of parameter space where new classes of transient sources may be detected. In this paper we review the known radio transient and variable populations and the current results from blind radio surveys. We outline a comprehensive program based on a multi-tiered survey strategy to characterise the radio transient sky through detection and monitoring of transient and variable sources on the ASKAP imaging timescales of 5 s and greater. We also present an analysis of the expected source populations that we will be able to detect with VAST.

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