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The Evolutionary Map of the Universe pilot survey

Published online by Cambridge University Press:  07 September 2021

Ray P. Norris*
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
Joshua Marvil
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia National Radio Astronomy Observatory, PO Box 0, Socorro, NM87801, USA
J. D. Collier
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia The Inter-University Institute for Data Intensive Astronomy (IDIA), Department of Astronomy, University of Cape Town, Rondebosch, 7701, South Africa
Anna D. Kapińska
Affiliation:
National Radio Astronomy Observatory, PO Box 0, Socorro, NM87801, USA
Andrew N. O’Brien
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia Department of Physics, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, WI 53201, USA
L. Rudnick
Affiliation:
Minnesota Institute for Astrophysics, University of Minnesota, 116 Church St. SE, Minneapolis, MN 55455, USA
Heinz Andernach
Affiliation:
Depto. de Astronomía, DCNE, Universidad de Guanajuato, Cjón. de Jalisco s/n, Guanajuato, CP 36023, Mexico
Jacobo Asorey
Affiliation:
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Av. Complutense, 40, 28040 Madrid, Spain
Michael J. I. Brown
Affiliation:
School of Physics and Astronomy, Monash University, Clayton, VIC 3800, Australia
Marcus Brüggen
Affiliation:
University of Hamburg, Hamburger Sternwarte, Gojenbergsweg 112, 21029 Hamburg, Germany
Evan Crawford
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
Jayanne English
Affiliation:
Institute of Space and Planetary Astrophysics (ISPA), University of Karachi (UoK), Karachi, Pakistan
Syed Faisal ur Rahman
Affiliation:
Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
Miroslav D. Filipović
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
Yjan Gordon
Affiliation:
Institute of Space and Planetary Astrophysics (ISPA), University of Karachi (UoK), Karachi, Pakistan
Gülay Gürkan
Affiliation:
CSIRO Space & Astronomy, PO Box 1130, Bentley WA 6102, Australia Thüringer Landessternwarte, Sternwarte 5, D-07778 Tautenburg, Germany
Catherine Hale
Affiliation:
CSIRO Space & Astronomy, PO Box 1130, Bentley WA 6102, Australia School of Physics and Astronomy, Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, EH9 3HJ Edinburgh, UK
Andrew M. Hopkins
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia Australian Astronomical Optics, Macquarie University, 105 Delhi Rd, North Ryde, NSW 2113, Australia
Minh T. Huynh
Affiliation:
CSIRO Space & Astronomy, PO Box 1130, Bentley WA 6102, Australia
Kim HyeongHan
Affiliation:
Yonsei University, Department of Astronomy, Seoul, Republic of Korea
M. James Jee
Affiliation:
Yonsei University, Department of Astronomy, Seoul, Republic of Korea Department of Physics, University of California, Davis, California, USA
Bärbel S. Koribalski
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
Emil Lenc
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
Kieran Luken
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
David Parkinson
Affiliation:
Korea Astronomy and Space Science Institute, Daejeon 34055, Korea University of Science and Technology, Daejeon 34113, Korea
Isabella Prandoni
Affiliation:
INAF – Istituto di Radioastronomia, via P. Gobetti 101, 40129 Bologna, Italy
Wasim Raja
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
Thomas H. Reiprich
Affiliation:
Argelander Institute for Astronomy (AIfA), University of Bonn, Auf dem Hügel 71, 53121 Bonn, Germany
Christopher J. Riseley
Affiliation:
CSIRO Space & Astronomy, PO Box 1130, Bentley WA 6102, Australia INAF – Istituto di Radioastronomia, via P. Gobetti 101, 40129 Bologna, Italy Dipartimento di Fisica e Astronomia, Università degli Studi di Bologna, via P. Gobetti 93/2, 40129 Bologna, Italy
Stanislav S. Shabala
Affiliation:
School of Natural Sciences, University of Tasmania, Private Bag 37, Hobart, TAS 7001, Australia
Jaimie R. Sheil
Affiliation:
School of Physics and Astronomy, Monash University, Clayton, VIC 3800, Australia
Tessa Vernstrom
Affiliation:
CSIRO Space & Astronomy, PO Box 1130, Bentley WA 6102, Australia
Matthew T. Whiting
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
James R. Allison
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia Sub-Dept. of Astrophysics, Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Rd., Oxford, OX1 3RH, UK
C. S. Anderson
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia National Radio Astronomy Observatory, PO Box 0, Socorro, NM87801, USA
Lewis Ball
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia SKA Observatory, Jodrell Bank, Lower Withington, Macclesfield, Cheshire SK11 9FT, UK
Martin Bell
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia School of Mathematical and Physical Sciences, University of Technology Sydney
John Bunton
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
T. J. Galvin
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia CSIRO Space & Astronomy, PO Box 1130, Bentley WA 6102, Australia International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia
Neeraj Gupta
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia IUCAA, Post Bag 4, Ganeshkhind, Pune University Campus,Pune 411 007, India
Aidan Hotan
Affiliation:
CSIRO Space & Astronomy, PO Box 1130, Bentley WA 6102, Australia
Colin Jacka
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
Peter J. Macgregor
Affiliation:
Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
Elizabeth K. Mahony
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
Umberto Maio
Affiliation:
INAF - Observatory of Trieste, via G. Tiepolo 11, 34143 Trieste, Italy
Vanessa Moss
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
M. Pandey-Pommier
Affiliation:
University Claude Bernard Lyon 1, Bâtiment Quai 43 - 2ème étage, 28, avenue Gaston Berger, 69622 Villeurbanne Cedex, France
Maxim A. Voronkov
Affiliation:
CSIRO Space & Astronomy, P.O. Box 76, Epping, NSW 1710, Australia
*
*Author for correspondence: Ray P. Norris, E-mail: raypnorris@gmail.com

Abstract

We present the data and initial results from the first pilot survey of the Evolutionary Map of the Universe (EMU), observed at 944 MHz with the Australian Square Kilometre Array Pathfinder (ASKAP) telescope. The survey covers $270 \,\mathrm{deg}^2$ of an area covered by the Dark Energy Survey, reaching a depth of 25–30 $\mu\mathrm{Jy\ beam}^{-1}$ rms at a spatial resolution of $\sim$ 11–18 arcsec, resulting in a catalogue of $\sim$ 220 000 sources, of which $\sim$ 180 000 are single-component sources. Here we present the catalogue of single-component sources, together with (where available) optical and infrared cross-identifications, classifications, and redshifts. This survey explores a new region of parameter space compared to previous surveys. Specifically, the EMU Pilot Survey has a high density of sources, and also a high sensitivity to low surface brightness emission. These properties result in the detection of types of sources that were rarely seen in or absent from previous surveys. We present some of these new results here.

Type
Research Article
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of the Astronomical Society of Australia

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