Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 465, Issue 2, Pages 1789-1806Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw2721
Keywords
catalogues; surveys; galaxies: evolution; galaxies: high-redshift; cosmology: observations
Categories
Funding
- Chinese Academy of Sciences [XDB09000000]
- Science and Technology Facilities Council of the United Kingdom
- Canadian Space Agency
- BIS National E-infrastructure capital grant [ST/K00042X/1]
- STFC capital grant [ST/H008519/1]
- STFC DiRAC Operations grant [ST/K003267/1]
- Durham University
- Royal Society University Research Fellowship
- ERC [321334, 321302]
- Royal Society Wolfson Merit Award
- European Research Council
- Swedish Research Council
- Collaborative Research Council 956 - Deutsche Forschungsgemeinschaft (DFG)
- [ST/L00075X/1]
- Science and Technology Facilities Council [ST/I001573/1, ST/M001008/1, ST/L000776/1, ST/M00208X/1, ST/K001949/1, ST/M000907/1, ST/K00185X/1, ST/L000695/1, ST/I00162X/1, ST/M007006/1, ST/K00042X/1, ST/N000927/1, ST/L00075X/1, ST/L000598/1, ST/J001414/1] Funding Source: researchfish
- STFC [ST/L001314/1, ST/J004723/1, ST/M005305/1, ST/I00162X/1, ST/I005765/1, ST/L000695/1, ST/K001051/1, ST/K00185X/1, ST/L000598/1, ST/M008029/1, ST/I001573/1, ST/M006190/1, ST/N000919/1, ST/L00075X/1, ST/K00042X/1, ST/K000926/1, ST/L005042/1, ST/J004650/1, ST/L000776/1, ST/K001949/1, ST/M007006/1, ST/M001008/1, ST/N000811/1, ST/P000541/1, ST/M000907/1, ST/M00208X/1, ST/J001414/1] Funding Source: UKRI
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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,
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