The SCUBA-2 Large eXtragalactic Survey: 850 μm map, catalogue and the bright-end number counts of the XMM-LSS field

T. K. Garratt; J. E. Geach; Y. Tamura; K. E.K. Coppin; M. Franco; Y. Ao; C. C. Chen; C. Cheng; D. L. Clements; Y. S. Dai; H. Dannerbauer; T. R. Greve; B. Hatsukade; H. S. Hwang; L. Jiang; K. Kohno; M. P. Koprowski; M. J. Michałowski; M. Sawicki; D. Scott; H. Shim; T. T. Takeuchi; W. H. Wang; Y. Q. Xue; C. Yang

doi:10.1093/mnras/stad307

The SCUBA-2 Large eXtragalactic Survey: 850 μm map, catalogue and the bright-end number counts of the XMM-LSS field

T. K. Garratt, J. E. Geach, Y. Tamura, K. E.K. Coppin, M. Franco, Y. Ao, C. C. Chen, C. Cheng, D. L. Clements, Y. S. Dai, H. Dannerbauer, T. R. Greve, B. Hatsukade, H. S. Hwang, L. Jiang, K. Kohno, M. P. Koprowski, M. J. Michałowski, M. Sawicki, D. ScottH. Shim, T. T. Takeuchi, W. H. Wang, Y. Q. Xue, C. Yang

Department of Earth Science Education

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7 Scopus citations

Abstract

We present 850 μm imaging of the XMM-LSS field observed for 170 h as part of the James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXS XMM-LSS maps an area of 9 deg², reaching a moderate depth of 1σ 4 mJy beam⁻¹. This is the largest contiguous area of extragalactic sky mapped by James Clerk Maxwell Telescope (JCMT) at 850 μm to date. The wide area of the S2LXS XMM-LSS survey allows us to probe the ultra-bright (S_850μm 15 mJy), yet rare submillimetre population. We present the S2LXS XMM-LSS catalogue, which comprises 40 sources detected at >5σ significance, with deboosted flux densities in the range of 7–48 mJy. We robustly measure the bright-end of the 850 μm number counts at flux densities >7 mJy, reducing the Poisson errors compared to existing measurements. The S2LXS XMM-LSS observed number counts show the characteristic upturn at bright fluxes, expected to be motivated by local sources of submillimetre emission and high-redshift strongly lensed galaxies. We find that the observed 850 μm number counts are best reproduced by model predictions that include either strong lensing or source blending from a 15-arcsec beam, indicating that both may make an important contribution to the observed overabundance of bright single dish 850 μm selected sources. We make the S2LXS XMM-LSS 850 μm map and >5σ catalogue presented here publicly available.

Original language	English
Pages (from-to)	3669-3687
Number of pages	19
Journal	Monthly Notices of the Royal Astronomical Society
Volume	520
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stad307
State	Published - 1 Apr 2023

Keywords

catalogues
galaxies: high-redshift
submillimetre: galaxies
surveys

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Garratt, T. K., Geach, J. E., Tamura, Y., Coppin, K. E. K., Franco, M., Ao, Y., Chen, C. C., Cheng, C., Clements, D. L., Dai, Y. S., Dannerbauer, H., Greve, T. R., Hatsukade, B., Hwang, H. S., Jiang, L., Kohno, K., Koprowski, M. P., Michałowski, M. J., Sawicki, M., ... Yang, C. (2023). The SCUBA-2 Large eXtragalactic Survey: 850 μm map, catalogue and the bright-end number counts of the XMM-LSS field. Monthly Notices of the Royal Astronomical Society, 520(3), 3669-3687. https://doi.org/10.1093/mnras/stad307

@article{6d2986742fa8484d95a37878eabd9732,

title = "The SCUBA-2 Large eXtragalactic Survey: 850 μm map, catalogue and the bright-end number counts of the XMM-LSS field",

abstract = "We present 850 μm imaging of the XMM-LSS field observed for 170 h as part of the James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXS XMM-LSS maps an area of 9 deg2, reaching a moderate depth of 1σ 4 mJy beam−1. This is the largest contiguous area of extragalactic sky mapped by James Clerk Maxwell Telescope (JCMT) at 850 μm to date. The wide area of the S2LXS XMM-LSS survey allows us to probe the ultra-bright (S850μm 15 mJy), yet rare submillimetre population. We present the S2LXS XMM-LSS catalogue, which comprises 40 sources detected at >5σ significance, with deboosted flux densities in the range of 7–48 mJy. We robustly measure the bright-end of the 850 μm number counts at flux densities >7 mJy, reducing the Poisson errors compared to existing measurements. The S2LXS XMM-LSS observed number counts show the characteristic upturn at bright fluxes, expected to be motivated by local sources of submillimetre emission and high-redshift strongly lensed galaxies. We find that the observed 850 μm number counts are best reproduced by model predictions that include either strong lensing or source blending from a 15-arcsec beam, indicating that both may make an important contribution to the observed overabundance of bright single dish 850 μm selected sources. We make the S2LXS XMM-LSS 850 μm map and >5σ catalogue presented here publicly available.",

keywords = "catalogues, galaxies: high-redshift, submillimetre: galaxies, surveys",

author = "Garratt, {T. K.} and Geach, {J. E.} and Y. Tamura and Coppin, {K. E.K.} and M. Franco and Y. Ao and Chen, {C. C.} and C. Cheng and Clements, {D. L.} and Dai, {Y. S.} and H. Dannerbauer and Greve, {T. R.} and B. Hatsukade and Hwang, {H. S.} and L. Jiang and K. Kohno and Koprowski, {M. P.} and Micha{\l}owski, {M. J.} and M. Sawicki and D. Scott and H. Shim and Takeuchi, {T. T.} and Wang, {W. H.} and Xue, {Y. Q.} and C. Yang",

year = "2023",

month = apr,

day = "1",

doi = "10.1093/mnras/stad307",

language = "English",

volume = "520",

pages = "3669--3687",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

}

Garratt, TK, Geach, JE, Tamura, Y, Coppin, KEK, Franco, M, Ao, Y, Chen, CC, Cheng, C, Clements, DL, Dai, YS, Dannerbauer, H, Greve, TR, Hatsukade, B, Hwang, HS, Jiang, L, Kohno, K, Koprowski, MP, Michałowski, MJ, Sawicki, M, Scott, D, Shim, H, Takeuchi, TT, Wang, WH, Xue, YQ & Yang, C 2023, 'The SCUBA-2 Large eXtragalactic Survey: 850 μm map, catalogue and the bright-end number counts of the XMM-LSS field', Monthly Notices of the Royal Astronomical Society, vol. 520, no. 3, pp. 3669-3687. https://doi.org/10.1093/mnras/stad307

TY - JOUR

T1 - The SCUBA-2 Large eXtragalactic Survey

T2 - 850 μm map, catalogue and the bright-end number counts of the XMM-LSS field

AU - Garratt, T. K.

AU - Geach, J. E.

AU - Tamura, Y.

AU - Coppin, K. E.K.

AU - Franco, M.

AU - Ao, Y.

AU - Chen, C. C.

AU - Cheng, C.

AU - Clements, D. L.

AU - Dai, Y. S.

AU - Dannerbauer, H.

AU - Greve, T. R.

AU - Hatsukade, B.

AU - Hwang, H. S.

AU - Jiang, L.

AU - Kohno, K.

AU - Koprowski, M. P.

AU - Michałowski, M. J.

AU - Sawicki, M.

AU - Scott, D.

AU - Shim, H.

AU - Takeuchi, T. T.

AU - Wang, W. H.

AU - Xue, Y. Q.

AU - Yang, C.

PY - 2023/4/1

Y1 - 2023/4/1

N2 - We present 850 μm imaging of the XMM-LSS field observed for 170 h as part of the James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXS XMM-LSS maps an area of 9 deg2, reaching a moderate depth of 1σ 4 mJy beam−1. This is the largest contiguous area of extragalactic sky mapped by James Clerk Maxwell Telescope (JCMT) at 850 μm to date. The wide area of the S2LXS XMM-LSS survey allows us to probe the ultra-bright (S850μm 15 mJy), yet rare submillimetre population. We present the S2LXS XMM-LSS catalogue, which comprises 40 sources detected at >5σ significance, with deboosted flux densities in the range of 7–48 mJy. We robustly measure the bright-end of the 850 μm number counts at flux densities >7 mJy, reducing the Poisson errors compared to existing measurements. The S2LXS XMM-LSS observed number counts show the characteristic upturn at bright fluxes, expected to be motivated by local sources of submillimetre emission and high-redshift strongly lensed galaxies. We find that the observed 850 μm number counts are best reproduced by model predictions that include either strong lensing or source blending from a 15-arcsec beam, indicating that both may make an important contribution to the observed overabundance of bright single dish 850 μm selected sources. We make the S2LXS XMM-LSS 850 μm map and >5σ catalogue presented here publicly available.

AB - We present 850 μm imaging of the XMM-LSS field observed for 170 h as part of the James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXS XMM-LSS maps an area of 9 deg2, reaching a moderate depth of 1σ 4 mJy beam−1. This is the largest contiguous area of extragalactic sky mapped by James Clerk Maxwell Telescope (JCMT) at 850 μm to date. The wide area of the S2LXS XMM-LSS survey allows us to probe the ultra-bright (S850μm 15 mJy), yet rare submillimetre population. We present the S2LXS XMM-LSS catalogue, which comprises 40 sources detected at >5σ significance, with deboosted flux densities in the range of 7–48 mJy. We robustly measure the bright-end of the 850 μm number counts at flux densities >7 mJy, reducing the Poisson errors compared to existing measurements. The S2LXS XMM-LSS observed number counts show the characteristic upturn at bright fluxes, expected to be motivated by local sources of submillimetre emission and high-redshift strongly lensed galaxies. We find that the observed 850 μm number counts are best reproduced by model predictions that include either strong lensing or source blending from a 15-arcsec beam, indicating that both may make an important contribution to the observed overabundance of bright single dish 850 μm selected sources. We make the S2LXS XMM-LSS 850 μm map and >5σ catalogue presented here publicly available.

KW - catalogues

KW - galaxies: high-redshift

KW - submillimetre: galaxies

KW - surveys

UR - http://www.scopus.com/inward/record.url?scp=85159170122&partnerID=8YFLogxK

U2 - 10.1093/mnras/stad307

DO - 10.1093/mnras/stad307

M3 - Article

AN - SCOPUS:85159170122

SN - 0035-8711

VL - 520

SP - 3669

EP - 3687

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

The SCUBA-2 Large eXtragalactic Survey: 850 μm map, catalogue and the bright-end number counts of the XMM-LSS field

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