The SCUBA-2 Cosmology Legacy Survey: 850 μm maps, catalogues and number counts
Journal article, 2017
We present a catalogue of similar to 3000 submillimetre sources detected (>= 3.5 sigma) at 850 mu m over similar to 5 deg(2) surveyed as part of the James Clerk Maxwell Telescope (JCMT) SCUBA-2 Cosmology Legacy Survey (S2CLS). This is the largest survey of its kind at 850 mu m, increasing the sample size of 850 mu m selected submillimetre galaxies by an order of magnitude. The wide 850 mu m survey component of S2CLS covers the extragalactic fields: UKIDSS-UDS, COSMOS, Akari-NEP, Extended Groth Strip, Lockman Hole North, SSA22 and GOODS-North. The average 1s depth of S2CLS is 1.2 mJy beam(-1), approaching the SCUBA-2 850 mu m confusion limit, which we determine to be sigma(c) approximate to 0.8 mJy beam(-1). We measure the 850 mu m number counts, reducing the Poisson errors on the differential counts to approximately 4 per cent at S-850 approximate to 3 mJy. With several independent fields, we investigate field-to-field variance, finding that the number counts on 0.5 degrees-1 degrees scales are generally within 50 per cent of the S2CLS mean for S-850 > 3 mJy, with scatter consistent with the Poisson and estimated cosmic variance uncertainties, although there is a marginal (2 sigma) density enhancement in GOODS-North. The observed counts are in reasonable agreement with recent phenomenological and semi-analytic models, although determining the shape of the faint-end slope (S-850 < 3 mJy) remains a key test. The large solid angle of S2CLS allows us to measure the bright-end counts: at S-850 > 10 mJy there are approximately 10 sources per square degree, and we detect the distinctive up-turn in the number counts indicative of the detection of local sources of 850 mu m emission
catalogues
degree extragalactic
cosmology: observations
high-redshift
galaxies: evolution
surveys
survey
galaxies: high-redshift
submillimeter galaxy population
resolves
deep field-south
clerk maxwell telescope
molecular gas
star-forming galaxies
14 hour field
survey alma
bolometer camera
Author
J.E. Geach
University of Hertfordshire
J.S. Dunlop
Royal Observatory
M. Halpern
University of British Columbia (UBC)
I. Smail
Durham University
P. van der Werf
Leiden University
D. M. Alexander
Durham University
O. Almaini
University of Nottingham
I. Aretxaga
National Institute of Astrophysics, Optics and Electronics
V. Arumugam
Royal Observatory
European Southern Observatory (ESO)
V. Asboth
University of British Columbia (UBC)
M. Banerji
University of Cambridge
J. Beanlands
Saint Mary's University
P. N. Best
Royal Observatory
A.W. Blain
University Of Leicester
M. Birkinshaw
University of Bristol
E. L. Chapin
National Research Council Canada
S. C. Chapman
Dalhousie University
C. C. Chen
Durham University
A. Chrysostomou
University of Manchester
C. Clarke
University of Sussex
D. L. Clements
Imperial College London
C. Conselice
University of Nottingham
K. E. K. Coppin
University of Hertfordshire
W. I. Cowley
Durham University
A. L. R. Danielson
Durham University
S. Eales
Cardiff University
A. C. Edge
Durham University
D. Farrah
Virginia Polytechnic Institute and State University
A. Gibb
University of British Columbia (UBC)
C. M. Harrison
Durham University
N. K. Hine
University of Hertfordshire
D. Hughes
National Institute of Astrophysics, Optics and Electronics
R. J. Ivison
European Southern Observatory (ESO)
Royal Observatory
M.J. Jarvis
University of Oxford
University of the Western Cape
T. Jenness
University of British Columbia (UBC)
Suzy Jones
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
A. Karim
University of Bonn
M. Koprowski
University of Hertfordshire
Kirsten Kraiberg Knudsen
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
C. G. Lacey
Durham University
T. Mackenzie
University of British Columbia (UBC)
G. Marsden
University of British Columbia (UBC)
K. McAlpine
University of the Western Cape
R. McMahon
European Southern Observatory (ESO)
R. Meijerink
Leiden University
University of Groningen
M. J. Michalowski
University of British Columbia (UBC)
S. J. Oliver
University of Sussex
M. J. Page
University College London (UCL)
J. A. Peacock
Royal Observatory
D. Rigopoulou
University of Oxford
STFC Rutherford Appleton Laboratory
I. Robson
Royal Observatory
I. Roseboom
Royal Observatory
K. Rotermund
Dalhousie University
D. Scott
University of British Columbia (UBC)
S. Serjeant
Open University
University of British Columbia (UBC)
C. Simpson
Gemini Observatory North
J. M. Simpson
Royal Observatory
D. J. B. Smith
University of Hertfordshire
M. Spaans
University of Groningen
F. Stanley
Durham University
J. A. Stevens
University of Hertfordshire
A. M. Swinbank
Durham University
T. Targett
Sonoma State University
A. P. Thomson
Durham University
E. Valiante
Cardiff University
D. A. Wake
University of Wisconsin Madison
Open University
T.M.A. Webb
McGill University
C. Willott
National Research Council Canada
J. A. Zavala
National Institute of Astrophysics, Optics and Electronics
M. Zemcov
Jet Propulsion Laboratory, California Institute of Technology
Rochester Institute of Technology
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 465 2 1789-1806Subject Categories
Astronomy, Astrophysics and Cosmology
Roots
Basic sciences
DOI
10.1093/mnras/stw2721