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M. LacyNational Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USAStefi A. BaumDepartment of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, CanadaC. J. ChandlerNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAShami ChatterjeeCornell Center for Astrophysics and Planetary Science and Department of Astronomy, Cornell University, Ithaca, NY 14853, USAT. E. ClarkeNaval Research Laboratory Remote Sensing Division, Code 7213, 4555 Overlook Avenue SW, Washington, DC 20375, USASusana E. DeustuaSpace Telescope Science Institute, 3700 San Martin Dr, Baltimore, MD 21218, USAJayanne EnglishDepartment of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, CanadaJ. S. FarnesB. M. GaenslerDunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 St George Street, Toronto, ON M5S 3H4, CanadaNicole E. GugliucciDepartment of Physics, St Anselm College, 100 Saint Anselm Drive, Manchester, NH 03102, USAG. HallinanCalifornia Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USAB. R. KentNational Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USAAmy KimballNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAC. J. LawCalifornia Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USAT. Joseph W. LazioJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USAJoshua MarvilNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAS. A. MaoMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyDrew MedlinNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAK. P. MooleyCalifornia Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USAE. J. MurphyNational Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USASteve MyersNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USARachel A. OstenSpace Telescope Science Institute, 3700 San Martin Dr, Baltimore, MD 21218, USAGordon T. RichardsDepartment of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USAErik RosolowskyDepartment of Physics, University of Alberta, CCIS 4-181, Edmonton AB T6G 2E1, CanadaL. RudnickMinnesota Institute for Astrophysics, School of Physics and Astronomy, University of Minnesota, 116 Church Street SE, Minneapolis, MN 55455, USAF. K. SchinzelNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAG. R. SivakoffDepartment of Physics, University of Alberta, CCIS 4-181, Edmonton AB T6G 2E1, CanadaLoránt O. SjouwermanNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USARuss TaylorDepartment of Physics and Astronomy, University of the Western Cape, Private Bag X17, Bellville 7535, South AfricaR. L. WhiteSpace Telescope Science Institute, 3700 San Martin Dr, Baltimore, MD 21218, USAJ. WrobelNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAH. AndernachDepartamento de Astronomía, DCNE, Universidad de Guanajuato, Apdo. Postal 144, 36000 Guanajuato, Guanajuato, MexicoA. J. BeasleyNational Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USAE. BergerHarvard Astronomy Department, 60 Garden Street, MS 46, Cambridge, MA 02138, USABhatnagar, S.National Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAM. BirkinshawHH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, UKGeoffrey C. BowerW. N. BrandtDepartment of Physics, 104 Davey Lab, The Pennsylvania State University, University Park, PA 16802, USAShea BrownThe University of Iowa, Department of Physics and Astronomy, 203 Van Allen Hall, Iowa City, IA 52242, USASarah Burke-SpolaorDepartment of Physics and Astronomy, West Virginia University, White Hall, Morgantown, WV 26506, USABryan ButlerNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAJulia M. ComerfordDepartment of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309, USAPaul B. DemorestNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAHai FuThe University of Iowa, Department of Physics and Astronomy, 203 Van Allen Hall, Iowa City, IA 52242, USAS. GiacintucciNaval Research Laboratory Remote Sensing Division, Code 7213, 4555 Overlook Avenue SW, Washington, DC 20375, USAK. GolapNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USATina GüthNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAC. A. HalesNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAR. HiriartNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAJacqueline HodgeLeiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, The NetherlandsA. HoreshRacah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem, 91904, IsraelŽeljko IvezićUniversity of Washington, Dept. of Astronomy, Box 351580, Seattle, WA 98195, USAM. J. JarvisDepartment of Physics and Astronomy, University of the Western Cape, Private Bag X17, Bellville 7535, South AfricaA. KambleCenter for Astrophysics ∣ Harvard and Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAN. E. KassimNaval Research Laboratory Remote Sensing Division, Code 7213, 4555 Overlook Avenue SW, Washington, DC 20375, USAX. LiuDepartment of Astronomy, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USALaurent LoinardInstituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, 58089, Michoacán, MexicoD. K. LyonsNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAJ. MastersNational Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USAMar MezcuaInstitut d'Estudis Espacials de Catalunya (IEEC), Carrer Gran Capità, E-08034 Barcelona, SpainG. MoellenbrockNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USATony MroczkowskiESO—European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching b. München, GermanyKristina NylandNational Research Council, resident at the Naval Research Laboratory, Washington, DC 20375, USAC. P. O’DeaDepartment of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, CanadaS. P. O’SullivanHamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, D-21029 Hamburg, GermanyWendy PetersNaval Research Laboratory Remote Sensing Division, Code 7213, 4555 Overlook Avenue SW, Washington, DC 20375, USAK. RadfordNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAU. R. RaoNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAJames RobnettNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAJaime SalcidoNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAYue ShenDepartment of Astronomy, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USAAlexander C. SobotkaNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAStephan WitzNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAM. VaccariINAF—Instituto di Radioastronomia, via Gobetti 101, I-40129 Bologna, ItalyR. J. van WeerenLeiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, The NetherlandsA. VargasNational Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USAPeter K. G. WilliamsCenter for Astrophysics ∣ Harvard and Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAI. YoonNational Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA
ABI
Аннотация
The Very Large Array Sky Survey (VLASS) is a synoptic, all-sky radio sky survey with a unique combination of high angular resolution ($\approx$2.5"), sensitivity (a 1$\sigma$ goal of 70 $\mu$Jy/beam in the coadded data), full linear Stokes polarimetry, time domain coverage, and wide bandwidth (2-4 GHz). The first observations began in September 2017, and observing for the survey will finish in 2024. VLASS will use approximately 5500 hours of time on the Karl G. Jansky Very Large Array (VLA) to cover the whole sky visible to the VLA (Declination $>-40^{\circ}$), a total of 33,885 deg$^2$. The data will be taken in three epochs to allow the discovery of variable and transient radio sources. The survey is designed to engage radio astronomy experts, multi-wavelength astronomers, and citizen scientists alike. By utilizing an "on the fly" interferometry mode, the observing overheads are much reduced compared to a conventional pointed survey. In this paper, we present the science case and observational strategy for the survey, and also results from early survey observations.
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