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; Yoichi 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. Michalowski; 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, Yoichi 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. Michalowski, M. Sawicki, D. ScottH. Shim, T. T. Takeuchi, W. -H. Wang, Y. Q. Xue, C. Yang

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Abstract

We present 850um imaging of the XMM-LSS field observed for 170 hours as part of the James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXS XMM-LSS maps an area of 9 square degrees, reaching a moderate depth of 1-sigma ~ 4 mJy/beam. This is the largest contiguous area of extragalactic sky mapped by JCMT at 850um to date. The wide area of the S2LXS XMM-LSS survey allows us to probe the ultra-bright (S_850um > 15 mJy), yet rare submillimetre population. We present the S2LXS XMM-LSS catalogue, which comprises 40 sources detected at >5-sigma significance, with deboosted flux densities in the range of 7 mJy to 48 mJy. We robustly measure the bright-end of the 850um 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 850um 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 over-abundance of bright single dish 850um selected sources. We make the S2LXS XMM-LSS 850um map and >5-sigma 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
Early online date	30 Jan 2023
DOIs	https://doi.org/10.1093/mnras/stad307
Publication status	Published - 30 Apr 2023

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astro-ph.GA

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© 2023 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY), https://creativecommons.org/licenses/by/4.0/
Final published version, 2.46 MBLicence: CC BY

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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., Michalowski, 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, 3669–3687. https://doi.org/10.1093/mnras/stad307

@article{ce1982084887444aad8368d71dd41483,

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

abstract = " We present 850um imaging of the XMM-LSS field observed for 170 hours as part of the James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXS XMM-LSS maps an area of 9 square degrees, reaching a moderate depth of 1-sigma ~ 4 mJy/beam. This is the largest contiguous area of extragalactic sky mapped by JCMT at 850um to date. The wide area of the S2LXS XMM-LSS survey allows us to probe the ultra-bright (S_850um > 15 mJy), yet rare submillimetre population. We present the S2LXS XMM-LSS catalogue, which comprises 40 sources detected at >5-sigma significance, with deboosted flux densities in the range of 7 mJy to 48 mJy. We robustly measure the bright-end of the 850um 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 850um 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 over-abundance of bright single dish 850um selected sources. We make the S2LXS XMM-LSS 850um map and >5-sigma catalogue presented here publicly available. ",

keywords = "astro-ph.GA",

author = "Garratt, {T. K.} and Geach, {J. E.} and Yoichi 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 Michalowski, {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",

note = "{\textcopyright} 2023 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY), https://creativecommons.org/licenses/by/4.0/",

year = "2023",

month = apr,

day = "30",

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 (OUP)",

}

Garratt, TK, Geach, JE, Tamura, Y, Coppin, KEK, Franco, M, Ao, Y, Chen, C-C, Cheng, C, Clements, DL, Dai, YS, Dannerbauer, H, Greve, TR, Hatsukade, B, Hwang, HS, Jiang, L, Kohno, K, Koprowski, MP, Michalowski, MJ, Sawicki, M, Scott, D, Shim, H, Takeuchi, TT, Wang, W-H, 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, pp. 3669–3687. https://doi.org/10.1093/mnras/stad307

TY - JOUR

T1 - The SCUBA-2 Large eXtragalactic Survey: 850 흁m map, catalogue and the bright-end number counts of the XMM-LSS field

AU - Garratt, T. K.

AU - Geach, J. E.

AU - Tamura, Yoichi

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 - Michalowski, 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.

N1 - © 2023 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY), https://creativecommons.org/licenses/by/4.0/

PY - 2023/4/30

Y1 - 2023/4/30

N2 - We present 850um imaging of the XMM-LSS field observed for 170 hours as part of the James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXS XMM-LSS maps an area of 9 square degrees, reaching a moderate depth of 1-sigma ~ 4 mJy/beam. This is the largest contiguous area of extragalactic sky mapped by JCMT at 850um to date. The wide area of the S2LXS XMM-LSS survey allows us to probe the ultra-bright (S_850um > 15 mJy), yet rare submillimetre population. We present the S2LXS XMM-LSS catalogue, which comprises 40 sources detected at >5-sigma significance, with deboosted flux densities in the range of 7 mJy to 48 mJy. We robustly measure the bright-end of the 850um 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 850um 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 over-abundance of bright single dish 850um selected sources. We make the S2LXS XMM-LSS 850um map and >5-sigma catalogue presented here publicly available.

AB - We present 850um imaging of the XMM-LSS field observed for 170 hours as part of the James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXS XMM-LSS maps an area of 9 square degrees, reaching a moderate depth of 1-sigma ~ 4 mJy/beam. This is the largest contiguous area of extragalactic sky mapped by JCMT at 850um to date. The wide area of the S2LXS XMM-LSS survey allows us to probe the ultra-bright (S_850um > 15 mJy), yet rare submillimetre population. We present the S2LXS XMM-LSS catalogue, which comprises 40 sources detected at >5-sigma significance, with deboosted flux densities in the range of 7 mJy to 48 mJy. We robustly measure the bright-end of the 850um 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 850um 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 over-abundance of bright single dish 850um selected sources. We make the S2LXS XMM-LSS 850um map and >5-sigma catalogue presented here publicly available.

KW - astro-ph.GA

U2 - 10.1093/mnras/stad307

DO - 10.1093/mnras/stad307

M3 - Article

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

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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