The ASKAP Variables and Slow Transients (VAST) Pilot Survey

Murphy, T; Kaplan, DL; Stewart, AJ; O'Brien, A; Lenc, E; Pintaldi, S; Pritchard, J; Dobie, D; Fox, A; Leung, JK; An, T; Bell, ME; Broderick, JW; Chatterjee, S; Dai, S; D'Antonio, D; Doyle, G; Gaensler, BM; Heald, G; Horesh, A; Jones, ML; McConnell, D; Moss, VA; Raja, W; Ramsay, G; Ryder, S; Sadler, EM; Sivakoff, GR; Wang, Y; Wang, Z; Wheatland, MS; Whiting, M; Allison, JR; Anderson, CS; Ball, L; Bannister, K; Bock, DCJ; Bolton, R; Bunton, JD; Chekkala, R; Chippendale, AP; Cooray, FR; Gupta, N; Hayman, DB; Jeganathan, K; Koribalski, B; Lee-Waddell, K; Mahony, EK; Marvil, J; McClure-Griffiths, NM; Mirtschin, P; Ng, A; Pearce, S; Phillips, C; Voronkov, MA

The ASKAP Variables and Slow Transients (VAST) Pilot Survey

Murphy, T Kaplan, DL Stewart, AJ O'Brien, A Lenc, E Pintaldi, S Pritchard, J Dobie, D Fox, A Leung, JK An, T Bell, ME Broderick, JW Chatterjee, S Dai, S D'Antonio, D Doyle, G Gaensler, BM Heald, G Horesh, A Jones, ML McConnell, D Moss, VA Raja, W Ramsay, G Ryder, S Sadler, EM Sivakoff, GR Wang, Y Wang, Z Wheatland, MS Whiting, M Allison, JR Anderson, CS Ball, L Bannister, K Bock, DCJ Bolton, R Bunton, JD Chekkala, R Chippendale, AP Cooray, FR Gupta, N Hayman, DB Jeganathan, K Koribalski, B Lee-Waddell, K Mahony, EK Marvil, J McClure-Griffiths, NM Mirtschin, P Ng, A Pearce, S Phillips, C Voronkov, MA

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Publisher:: CAMBRIDGE UNIV PRESS
Publication Type:: Journal Article
Citation:: Publications of the Astronomical Society of Australia, 2021, 38
Issue Date:: 2021-10-12

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Field	Value	Language
dc.contributor.author	Murphy, T
dc.contributor.author	Kaplan, DL
dc.contributor.author	Stewart, AJ
dc.contributor.author	O'Brien, A
dc.contributor.author	Lenc, E
dc.contributor.author	Pintaldi, S
dc.contributor.author	Pritchard, J
dc.contributor.author	Dobie, D
dc.contributor.author	Fox, A
dc.contributor.author	Leung, JK
dc.contributor.author	An, T
dc.contributor.author	Bell, ME
dc.contributor.author	Broderick, JW
dc.contributor.author	Chatterjee, S
dc.contributor.author	Dai, S
dc.contributor.author	D'Antonio, D
dc.contributor.author	Doyle, G
dc.contributor.author	Gaensler, BM
dc.contributor.author	Heald, G
dc.contributor.author	Horesh, A
dc.contributor.author	Jones, ML
dc.contributor.author	McConnell, D
dc.contributor.author	Moss, VA
dc.contributor.author	Raja, W
dc.contributor.author	Ramsay, G
dc.contributor.author	Ryder, S
dc.contributor.author	Sadler, EM
dc.contributor.author	Sivakoff, GR
dc.contributor.author	Wang, Y
dc.contributor.author	Wang, Z
dc.contributor.author	Wheatland, MS
dc.contributor.author	Whiting, M
dc.contributor.author	Allison, JR
dc.contributor.author	Anderson, CS
dc.contributor.author	Ball, L
dc.contributor.author	Bannister, K
dc.contributor.author	Bock, DCJ
dc.contributor.author	Bolton, R
dc.contributor.author	Bunton, JD
dc.contributor.author	Chekkala, R
dc.contributor.author	Chippendale, AP
dc.contributor.author	Cooray, FR
dc.contributor.author	Gupta, N
dc.contributor.author	Hayman, DB
dc.contributor.author	Jeganathan, K
dc.contributor.author	Koribalski, B
dc.contributor.author	Lee-Waddell, K
dc.contributor.author	Mahony, EK
dc.contributor.author	Marvil, J
dc.contributor.author	McClure-Griffiths, NM
dc.contributor.author	Mirtschin, P
dc.contributor.author	Ng, A
dc.contributor.author	Pearce, S
dc.contributor.author	Phillips, C
dc.contributor.author	Voronkov, MA
dc.date.accessioned	2022-03-27T23:34:59Z
dc.date.available	2022-03-27T23:34:59Z
dc.date.issued	2021-10-12
dc.identifier.citation	Publications of the Astronomical Society of Australia, 2021, 38
dc.identifier.issn	1323-3580
dc.identifier.issn	1448-6083
dc.identifier.uri	http://hdl.handle.net/10453/155620
dc.description.abstract	The Variables and Slow Transients Survey (VAST) on the Australian Square Kilometre Array Pathfinder (ASKAP) is designed to detect highly variable and transient radio sources on timescales from 5 s to ~5 yr. In this paper, we present the survey description, observation strategy and initial results from the VAST Phase I Pilot Survey. This pilot survey consists of ~162 h of observations conducted at a central frequency of 888 MHz between 2019 August and 2020 August, with a typical rms sensitivity of 0.24 mJy beam-1 and angular resolution of 12 -20 arcseconds. There are 113 fields, each of which was observed for 12 min integration time, with between 5 and 13 repeats, with cadences between 1 day and 8 months. The total area of the pilot survey footprint is 5 131 square degrees, covering six distinct regions of the sky. An initial search of two of these regions, totalling 1 646 square degrees, revealed 28 highly variable and/or transient sources. Seven of these are known pulsars, including the millisecond pulsar J2039-5617. Another seven are stars, four of which have no previously reported radio detection (SCR J0533-4257, LEHPM 2-783, UCAC3 89-412162 and 2MASS J22414436-6119311). Of the remaining 14 sources, two are active galactic nuclei, six are associated with galaxies and the other six have nomulti-wavelength counterparts and are yet to be identified.
dc.language	English
dc.publisher	CAMBRIDGE UNIV PRESS
dc.relation	http://purl.org/au-research/grants/arc/DP190100561
dc.relation.ispartof	Publications of the Astronomical Society of Australia
dc.relation.isbasedon	10.1017/pasa.2021.44
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0201 Astronomical and Space Sciences, 0299 Other Physical Sciences
dc.subject.classification	Astronomy & Astrophysics
dc.title	The ASKAP Variables and Slow Transients (VAST) Pilot Survey
dc.type	Journal Article
utslib.citation.volume	38
utslib.for	0201 Astronomical and Space Sciences
utslib.for	0299 Other Physical Sciences
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access	*
dc.date.updated	2022-03-27T23:34:57Z
pubs.publication-status	Published
pubs.volume	38

Abstract:

The Variables and Slow Transients Survey (VAST) on the Australian Square Kilometre Array Pathfinder (ASKAP) is designed to detect highly variable and transient radio sources on timescales from 5 s to ~5 yr. In this paper, we present the survey description, observation strategy and initial results from the VAST Phase I Pilot Survey. This pilot survey consists of ~162 h of observations conducted at a central frequency of 888 MHz between 2019 August and 2020 August, with a typical rms sensitivity of 0.24 mJy beam-1 and angular resolution of 12 -20 arcseconds. There are 113 fields, each of which was observed for 12 min integration time, with between 5 and 13 repeats, with cadences between 1 day and 8 months. The total area of the pilot survey footprint is 5 131 square degrees, covering six distinct regions of the sky. An initial search of two of these regions, totalling 1 646 square degrees, revealed 28 highly variable and/or transient sources. Seven of these are known pulsars, including the millisecond pulsar J2039-5617. Another seven are stars, four of which have no previously reported radio detection (SCR J0533-4257, LEHPM 2-783, UCAC3 89-412162 and 2MASS J22414436-6119311). Of the remaining 14 sources, two are active galactic nuclei, six are associated with galaxies and the other six have nomulti-wavelength counterparts and are yet to be identified.

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http://hdl.handle.net/10453/155620