Details

Autor(en) / Beteiligte

• Murphy, Tara
• Kaplan, David L.
• Stewart, Adam J.
• O’Brien, Andrew
• Lenc, Emil
• Pintaldi, Sergio
• Pritchard, Joshua
• Dobie, Dougal
• Fox, Archibald
• Leung, James K.
• An, Tao
• Bell, Martin E.
• Broderick, Jess W.
• Chatterjee, Shami
• Dai, Shi
• d’Antonio, Daniele
• Doyle, Gerry
• Gaensler, B. M.
• Heald, George
• Horesh, Assaf
• Jones, Megan L.
• McConnell, David
• Moss, Vanessa A.
• Raja, Wasim
• Ramsay, Gavin
• Ryder, Stuart
• Sadler, Elaine M.
• Sivakoff, Gregory R.
• Wang, Yuanming
• Wang, Ziteng
• Wheatland, Michael S.
• Whiting, Matthew
• Allison, James R.
• Anderson, C. S.
• Ball, Lewis
• Bannister, K.
• Bock, D. C.-J.
• Bolton, R.
• Bunton, J. D.
• Chekkala, R.
• Chippendale, A. P
• Cooray, F. R.
• Gupta, N.
• Hayman, D. B.
• Jeganathan, K.
• Koribalski, B.
• Lee-Waddell, K.
• Mahony, Elizabeth K.
• Marvil, J.
• McClure-Griffiths, N. M.
• Mirtschin, P.
• Ng, A.
• Pearce, S.
• Phillips, C.
• Voronkov, M. A.

Titel

The ASKAP Variables and Slow Transients (VAST) Pilot Survey

Ist Teil von

• Publications of the Astronomical Society of Australia, 2021-10, Vol.38, Article e054

Ort / Verlag

New York, USA: Cambridge University Press

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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 $\sim\!5$ 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 $\sim\!162$ h of observations conducted at a central frequency of 888 MHz between 2019 August and 2020 August, with a typical rms sensitivity of $0.24\ \mathrm{mJy\ beam}^{-1}$ 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 no multi-wavelength counterparts and are yet to be identified.