The SCUBA-2 Cosmology Legacy Survey: 850 μm maps, catalogues and number counts

We present a catalogue of ∼3000 submillimetre sources detected (≥3.5σ) at 850 μm over ∼5 deg2 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 μm, increasing the sample size of 850 μm selected submilli...

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Main Authors:	Geach, J.E., Dunlop, J.S., Halpern, M., Smail, Ian, van der Werf, P., Alexander, D.M., Almaini, O., Aretxaga, I., Arumugam, V., Asboth, V., Banerji, M., Beanlands, J., Best, P.N., Blain, A.W., Birkinshaw, M., Chapin, E.L., Chapman, S.C., Chen, C-C., Chrysostomou, A., Clarke, C., Clements, D.L., Conselice, Christopher J., Coppin, K.E.K., Cowley, W.I., Danielson, A.L.R., Eales, S., Edge, A.C., Farrah, D., Gibb, A., Harrison, C.M., Hine, N.K., Hughes, D., Ivison, R.J., Jarvis, M., Jenness, T., Jones, S.F., Karim, A., Koprowski, M., Knudsen, K.K., Lacey, C.G., Mackenzie, T., Marsden, G., McAlpine, K., McMahon, R., Meijerink, R., Michałowski, M.J., Oliver, S.J., Page, M.J., Peacock, J.A., Rigopoulou, D., Robson, E.I., Roseboom, I., Rotermund, K., Scott, Douglas, Serjeant, S., Simpson, C., Simpson, J.M., Smith, D.J.B., Spaans, M., Stanley, F., Stevens, J.A., Swinbank, A.M., Targett, T., Thomson, A.P., Valiante, E., Wake, D.A., Webb, T.M.A., Willott, C., Zavala, J.A., Zemcov, M.
Format:	Article
Language:	English
Published:	Oxford University Press 2017
Subjects:	catalogues ; surveys ; galaxies: evolution ; galaxies: high-redshift ; cosmology: observations.
Online Access:	https://eprints.nottingham.ac.uk/39845/

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author	Geach, J.E. Dunlop, J.S. Halpern, M. Smail, Ian van der Werf, P. Alexander, D.M. Almaini, O. Aretxaga, I. Arumugam, V. Asboth, V. Banerji, M. Beanlands, J. Best, P.N. Blain, A.W. Birkinshaw, M. Chapin, E.L. Chapman, S.C. Chen, C-C. Chrysostomou, A. Clarke, C. Clements, D.L. Conselice, Christopher J. Coppin, K.E.K. Cowley, W.I. Danielson, A.L.R. Eales, S. Edge, A.C. Farrah, D. Gibb, A. Harrison, C.M. Hine, N.K. Hughes, D. Ivison, R.J. Jarvis, M. Jenness, T. Jones, S.F. Karim, A. Koprowski, M. Knudsen, K.K. Lacey, C.G. Mackenzie, T. Marsden, G. McAlpine, K. McMahon, R. Meijerink, R. Michałowski, M.J. Oliver, S.J. Page, M.J. Peacock, J.A. Rigopoulou, D. Robson, E.I. Roseboom, I. Rotermund, K. Scott, Douglas Serjeant, S. Simpson, C. Simpson, J.M. Smith, D.J.B. Spaans, M. Stanley, F. Stevens, J.A. Swinbank, A.M. Targett, T. Thomson, A.P. Valiante, E. Wake, D.A. Webb, T.M.A. Willott, C. Zavala, J.A. Zemcov, M.
author_facet	Geach, J.E. Dunlop, J.S. Halpern, M. Smail, Ian van der Werf, P. Alexander, D.M. Almaini, O. Aretxaga, I. Arumugam, V. Asboth, V. Banerji, M. Beanlands, J. Best, P.N. Blain, A.W. Birkinshaw, M. Chapin, E.L. Chapman, S.C. Chen, C-C. Chrysostomou, A. Clarke, C. Clements, D.L. Conselice, Christopher J. Coppin, K.E.K. Cowley, W.I. Danielson, A.L.R. Eales, S. Edge, A.C. Farrah, D. Gibb, A. Harrison, C.M. Hine, N.K. Hughes, D. Ivison, R.J. Jarvis, M. Jenness, T. Jones, S.F. Karim, A. Koprowski, M. Knudsen, K.K. Lacey, C.G. Mackenzie, T. Marsden, G. McAlpine, K. McMahon, R. Meijerink, R. Michałowski, M.J. Oliver, S.J. Page, M.J. Peacock, J.A. Rigopoulou, D. Robson, E.I. Roseboom, I. Rotermund, K. Scott, Douglas Serjeant, S. Simpson, C. Simpson, J.M. Smith, D.J.B. Spaans, M. Stanley, F. Stevens, J.A. Swinbank, A.M. Targett, T. Thomson, A.P. Valiante, E. Wake, D.A. Webb, T.M.A. Willott, C. Zavala, J.A. Zemcov, M.
author_sort	Geach, J.E.
building	Nottingham Research Data Repository
collection	Online Access
description	We present a catalogue of ∼3000 submillimetre sources detected (≥3.5σ) at 850 μm over ∼5 deg2 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 μm, increasing the sample size of 850 μm selected submillimetre galaxies by an order of magnitude. The wide 850 μm 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 1σ depth of S2CLS is 1.2 mJy beam−1, approaching the SCUBA-2 850 μm confusion limit, which we determine to be σc ≈ 0.8 mJy beam−1.We measure the 850 μm number counts, reducing the Poisson errors on the differential counts to approximately 4 per cent at S850 ≈ 3 mJy. With several independent fields, we investigate field-to-field variance, finding that the number counts on 0.5◦–1◦ scales are generally within 50 per cent of the S2CLS mean for S850 > 3 mJy, with scatter consistent with the Poisson and estimated cosmic variance uncertainties, although there is a marginal (2σ) 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 (S850 < 3 mJy) remains a key test. The large solid angle of S2CLS allows us to measure the bright-end counts: at S850 >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 μm emission, and strongly lensed high-redshift galaxies. All calibrated maps and the catalogue are made publicly available.
first_indexed	2025-11-14T19:39:51Z
format	Article
id	nottingham-39845
institution	University of Nottingham Malaysia Campus
institution_category	Local University
language	English
last_indexed	2025-11-14T19:39:51Z
publishDate	2017
publisher	Oxford University Press
recordtype	eprints
repository_type	Digital Repository
spelling	nottingham-398452018-01-23T23:38:54Z https://eprints.nottingham.ac.uk/39845/ The SCUBA-2 Cosmology Legacy Survey: 850 μm maps, catalogues and number counts Geach, J.E. Dunlop, J.S. Halpern, M. Smail, Ian van der Werf, P. Alexander, D.M. Almaini, O. Aretxaga, I. Arumugam, V. Asboth, V. Banerji, M. Beanlands, J. Best, P.N. Blain, A.W. Birkinshaw, M. Chapin, E.L. Chapman, S.C. Chen, C-C. Chrysostomou, A. Clarke, C. Clements, D.L. Conselice, Christopher J. Coppin, K.E.K. Cowley, W.I. Danielson, A.L.R. Eales, S. Edge, A.C. Farrah, D. Gibb, A. Harrison, C.M. Hine, N.K. Hughes, D. Ivison, R.J. Jarvis, M. Jenness, T. Jones, S.F. Karim, A. Koprowski, M. Knudsen, K.K. Lacey, C.G. Mackenzie, T. Marsden, G. McAlpine, K. McMahon, R. Meijerink, R. Michałowski, M.J. Oliver, S.J. Page, M.J. Peacock, J.A. Rigopoulou, D. Robson, E.I. Roseboom, I. Rotermund, K. Scott, Douglas Serjeant, S. Simpson, C. Simpson, J.M. Smith, D.J.B. Spaans, M. Stanley, F. Stevens, J.A. Swinbank, A.M. Targett, T. Thomson, A.P. Valiante, E. Wake, D.A. Webb, T.M.A. Willott, C. Zavala, J.A. Zemcov, M. We present a catalogue of ∼3000 submillimetre sources detected (≥3.5σ) at 850 μm over ∼5 deg2 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 μm, increasing the sample size of 850 μm selected submillimetre galaxies by an order of magnitude. The wide 850 μm 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 1σ depth of S2CLS is 1.2 mJy beam−1, approaching the SCUBA-2 850 μm confusion limit, which we determine to be σc ≈ 0.8 mJy beam−1.We measure the 850 μm number counts, reducing the Poisson errors on the differential counts to approximately 4 per cent at S850 ≈ 3 mJy. With several independent fields, we investigate field-to-field variance, finding that the number counts on 0.5◦–1◦ scales are generally within 50 per cent of the S2CLS mean for S850 > 3 mJy, with scatter consistent with the Poisson and estimated cosmic variance uncertainties, although there is a marginal (2σ) 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 (S850 < 3 mJy) remains a key test. The large solid angle of S2CLS allows us to measure the bright-end counts: at S850 >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 μm emission, and strongly lensed high-redshift galaxies. All calibrated maps and the catalogue are made publicly available. Oxford University Press 2017-02-01 Article PeerReviewed application/pdf en https://eprints.nottingham.ac.uk/39845/1/MNRAS-2017-Geach-1789-806.pdf Geach, J.E., Dunlop, J.S., Halpern, M., Smail, Ian, van der Werf, P., Alexander, D.M., Almaini, O., Aretxaga, I., Arumugam, V., Asboth, V., Banerji, M., Beanlands, J., Best, P.N., Blain, A.W., Birkinshaw, M., Chapin, E.L., Chapman, S.C., Chen, C-C., Chrysostomou, A., Clarke, C., Clements, D.L., Conselice, Christopher J., Coppin, K.E.K., Cowley, W.I., Danielson, A.L.R., Eales, S., Edge, A.C., Farrah, D., Gibb, A., Harrison, C.M., Hine, N.K., Hughes, D., Ivison, R.J., Jarvis, M., Jenness, T., Jones, S.F., Karim, A., Koprowski, M., Knudsen, K.K., Lacey, C.G., Mackenzie, T., Marsden, G., McAlpine, K., McMahon, R., Meijerink, R., Michałowski, M.J., Oliver, S.J., Page, M.J., Peacock, J.A., Rigopoulou, D., Robson, E.I., Roseboom, I., Rotermund, K., Scott, Douglas, Serjeant, S., Simpson, C., Simpson, J.M., Smith, D.J.B., Spaans, M., Stanley, F., Stevens, J.A., Swinbank, A.M., Targett, T., Thomson, A.P., Valiante, E., Wake, D.A., Webb, T.M.A., Willott, C., Zavala, J.A. and Zemcov, M. (2017) The SCUBA-2 Cosmology Legacy Survey: 850 μm maps, catalogues and number counts. Monthly Notices of the Royal Astronomical Society, 465 (2). pp. 1789-1806. ISSN 0035-8711 catalogues ; surveys ; galaxies: evolution ; galaxies: high-redshift ; cosmology: observations. https://academic.oup.com/mnras/article/465/2/1789/2454739/The-SCUBA-2-Cosmology-Legacy-Survey-850-m-maps doi:10.1093/mnras/stw2721 doi:10.1093/mnras/stw2721
spellingShingle	catalogues ; surveys ; galaxies: evolution ; galaxies: high-redshift ; cosmology: observations. Geach, J.E. Dunlop, J.S. Halpern, M. Smail, Ian van der Werf, P. Alexander, D.M. Almaini, O. Aretxaga, I. Arumugam, V. Asboth, V. Banerji, M. Beanlands, J. Best, P.N. Blain, A.W. Birkinshaw, M. Chapin, E.L. Chapman, S.C. Chen, C-C. Chrysostomou, A. Clarke, C. Clements, D.L. Conselice, Christopher J. Coppin, K.E.K. Cowley, W.I. Danielson, A.L.R. Eales, S. Edge, A.C. Farrah, D. Gibb, A. Harrison, C.M. Hine, N.K. Hughes, D. Ivison, R.J. Jarvis, M. Jenness, T. Jones, S.F. Karim, A. Koprowski, M. Knudsen, K.K. Lacey, C.G. Mackenzie, T. Marsden, G. McAlpine, K. McMahon, R. Meijerink, R. Michałowski, M.J. Oliver, S.J. Page, M.J. Peacock, J.A. Rigopoulou, D. Robson, E.I. Roseboom, I. Rotermund, K. Scott, Douglas Serjeant, S. Simpson, C. Simpson, J.M. Smith, D.J.B. Spaans, M. Stanley, F. Stevens, J.A. Swinbank, A.M. Targett, T. Thomson, A.P. Valiante, E. Wake, D.A. Webb, T.M.A. Willott, C. Zavala, J.A. Zemcov, M. The SCUBA-2 Cosmology Legacy Survey: 850 μm maps, catalogues and number counts
title	The SCUBA-2 Cosmology Legacy Survey: 850 μm maps, catalogues and number counts
title_full	The SCUBA-2 Cosmology Legacy Survey: 850 μm maps, catalogues and number counts
title_fullStr	The SCUBA-2 Cosmology Legacy Survey: 850 μm maps, catalogues and number counts
title_full_unstemmed	The SCUBA-2 Cosmology Legacy Survey: 850 μm maps, catalogues and number counts
title_short	The SCUBA-2 Cosmology Legacy Survey: 850 μm maps, catalogues and number counts
title_sort	scuba-2 cosmology legacy survey: 850 μm maps, catalogues and number counts
topic	catalogues ; surveys ; galaxies: evolution ; galaxies: high-redshift ; cosmology: observations.
url	https://eprints.nottingham.ac.uk/39845/ https://eprints.nottingham.ac.uk/39845/ https://eprints.nottingham.ac.uk/39845/

The SCUBA-2 Cosmology Legacy Survey: 850 μm maps, catalogues and number counts

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