The CFHT large area U-band deep survey (CLAUDS)

Marcin Sawicki; Stephane Arnouts; Jiasheng Huang; Jean Coupon; Anneya Golob; Stephen Gwyn; Sebastien Foucaud; Thibaud Moutard; Ikuru Iwata; Chengze Liu; Lingjian Chen; Guillaume Desprez; Yuichi Harikane; Yoshiaki Ono; Michael A. Strauss; Masayuki Tanaka; Nathalie Thibert; Michael Balogh; Kevin Bundy; Scott Chapman; James E. Gunn; Bau Ching Hsieh; Olivier Ilbert; Yipeng Jing; Olivier LeFèvre; Cheng Li; Yuichi Matsuda; Satoshi Miyazaki; Tohru Nagao; Atsushi J. Nishizawa; Masami Ouchi; Kazuhiro Shimasaku; John Silverman; Sylvain De la Torre; Laurence Tresse; Wei Hao Wang; Chris J. Willott; Toru Yamada; Xiaohu Yang; Howard K.C. Yee

doi:10.1093/mnras/stz2522

The CFHT large area U-band deep survey (CLAUDS)

Marcin Sawicki, Stephane Arnouts, Jiasheng Huang, Jean Coupon, Anneya Golob, Stephen Gwyn, Sebastien Foucaud, Thibaud Moutard, Ikuru Iwata, Chengze Liu, Lingjian Chen, Guillaume Desprez, Yuichi Harikane, Yoshiaki Ono, Michael A. Strauss, Masayuki Tanaka, Nathalie Thibert, Michael Balogh, Kevin Bundy, Scott ChapmanJames E. Gunn, Bau Ching Hsieh, Olivier Ilbert, Yipeng Jing, Olivier LeFèvre, Cheng Li, Yuichi Matsuda, Satoshi Miyazaki, Tohru Nagao, Atsushi J. Nishizawa, Masami Ouchi, Kazuhiro Shimasaku, John Silverman, Sylvain De la Torre, Laurence Tresse, Wei Hao Wang, Chris J. Willott, Toru Yamada, Xiaohu Yang, Howard K.C. Yee

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Abstract

The Canada–France–Hawaii Telescope (CFHT) Large Area U-band Deep Survey (CLAUDS) uses data taken with the MegaCam mosaic imager on CFHT to produce images of 18.60 deg² with median seeing of FWHM = 0.92 arcsec and to a median depth of U = 27.1 AB (5σ in 2 arcsec apertures), with selected areas that total 1.36 deg² reaching a median depth of U = 27.7 AB. These are the deepest U-band images assembled to date over this large an area. These data are located in four fields also imaged to comparably faint levels in grizy and several narrowband filters as part of the Hyper Suprime–Cam (HSC) Subaru Strategic Program (HSC-SSP). These CFHT and Subaru data sets will remain unmatched in their combination of area and depth until the advent of the Large Synoptic Survey Telescope. This paper provides an overview of the scientific motivation for CLAUDS and gives details of the observing strategy, observations, data reduction, and data merging with the HSC-SSP. Three early applications of these deep data are used to illustrate the potential of the data set: deep U-band galaxy number counts, z ∼ 3 Lyman break galaxy selection, and photometric redshifts improved by adding CLAUDS U to the Subaru HSC grizy photometry.

Original language	English (US)
Pages (from-to)	5202-5217
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	489
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stz2522
State	Published - 2019

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cosmology: observations
Dark matter
Galaxies: formation
Galaxies: haloes
Galaxies: statistics
Large-scale structure of universe

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10.1093/mnras/stz2522

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Sawicki, M., Arnouts, S., Huang, J., Coupon, J., Golob, A., Gwyn, S., Foucaud, S., Moutard, T., Iwata, I., Liu, C., Chen, L., Desprez, G., Harikane, Y., Ono, Y., Strauss, M. A., Tanaka, M., Thibert, N., Balogh, M., Bundy, K., ... Yee, H. K. C. (2019). The CFHT large area U-band deep survey (CLAUDS). Monthly Notices of the Royal Astronomical Society, 489(4), 5202-5217. https://doi.org/10.1093/mnras/stz2522

@article{602c29ec5a8643159159ca6459f76320,

title = "The CFHT large area U-band deep survey (CLAUDS)",

abstract = "The Canada–France–Hawaii Telescope (CFHT) Large Area U-band Deep Survey (CLAUDS) uses data taken with the MegaCam mosaic imager on CFHT to produce images of 18.60 deg2 with median seeing of FWHM = 0.92 arcsec and to a median depth of U = 27.1 AB (5σ in 2 arcsec apertures), with selected areas that total 1.36 deg2 reaching a median depth of U = 27.7 AB. These are the deepest U-band images assembled to date over this large an area. These data are located in four fields also imaged to comparably faint levels in grizy and several narrowband filters as part of the Hyper Suprime–Cam (HSC) Subaru Strategic Program (HSC-SSP). These CFHT and Subaru data sets will remain unmatched in their combination of area and depth until the advent of the Large Synoptic Survey Telescope. This paper provides an overview of the scientific motivation for CLAUDS and gives details of the observing strategy, observations, data reduction, and data merging with the HSC-SSP. Three early applications of these deep data are used to illustrate the potential of the data set: deep U-band galaxy number counts, z ∼ 3 Lyman break galaxy selection, and photometric redshifts improved by adding CLAUDS U to the Subaru HSC grizy photometry.",

keywords = "Cosmology: observations, Dark matter, Galaxies: formation, Galaxies: haloes, Galaxies: statistics, Large-scale structure of universe",

author = "Marcin Sawicki and Stephane Arnouts and Jiasheng Huang and Jean Coupon and Anneya Golob and Stephen Gwyn and Sebastien Foucaud and Thibaud Moutard and Ikuru Iwata and Chengze Liu and Lingjian Chen and Guillaume Desprez and Yuichi Harikane and Yoshiaki Ono and Strauss, {Michael A.} and Masayuki Tanaka and Nathalie Thibert and Michael Balogh and Kevin Bundy and Scott Chapman and Gunn, {James E.} and Hsieh, {Bau Ching} and Olivier Ilbert and Yipeng Jing and Olivier LeF{\`e}vre and Cheng Li and Yuichi Matsuda and Satoshi Miyazaki and Tohru Nagao and Nishizawa, {Atsushi J.} and Masami Ouchi and Kazuhiro Shimasaku and John Silverman and {De la Torre}, Sylvain and Laurence Tresse and Wang, {Wei Hao} and Willott, {Chris J.} and Toru Yamada and Xiaohu Yang and Yee, {Howard K.C.}",

note = "Publisher Copyright: {\textcopyright} 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2019",

doi = "10.1093/mnras/stz2522",

language = "English (US)",

volume = "489",

pages = "5202--5217",

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

issn = "0035-8711",

publisher = "Oxford University Press",

number = "4",

}

Sawicki, M, Arnouts, S, Huang, J, Coupon, J, Golob, A, Gwyn, S, Foucaud, S, Moutard, T, Iwata, I, Liu, C, Chen, L, Desprez, G, Harikane, Y, Ono, Y, Strauss, MA, Tanaka, M, Thibert, N, Balogh, M, Bundy, K, Chapman, S, Gunn, JE, Hsieh, BC, Ilbert, O, Jing, Y, LeFèvre, O, Li, C, Matsuda, Y, Miyazaki, S, Nagao, T, Nishizawa, AJ, Ouchi, M, Shimasaku, K, Silverman, J, De la Torre, S, Tresse, L, Wang, WH, Willott, CJ, Yamada, T, Yang, X & Yee, HKC 2019, 'The CFHT large area U-band deep survey (CLAUDS)', Monthly Notices of the Royal Astronomical Society, vol. 489, no. 4, pp. 5202-5217. https://doi.org/10.1093/mnras/stz2522

TY - JOUR

T1 - The CFHT large area U-band deep survey (CLAUDS)

AU - Sawicki, Marcin

AU - Arnouts, Stephane

AU - Huang, Jiasheng

AU - Coupon, Jean

AU - Golob, Anneya

AU - Gwyn, Stephen

AU - Foucaud, Sebastien

AU - Moutard, Thibaud

AU - Iwata, Ikuru

AU - Liu, Chengze

AU - Chen, Lingjian

AU - Desprez, Guillaume

AU - Harikane, Yuichi

AU - Ono, Yoshiaki

AU - Strauss, Michael A.

AU - Tanaka, Masayuki

AU - Thibert, Nathalie

AU - Balogh, Michael

AU - Bundy, Kevin

AU - Chapman, Scott

AU - Gunn, James E.

AU - Hsieh, Bau Ching

AU - Ilbert, Olivier

AU - Jing, Yipeng

AU - LeFèvre, Olivier

AU - Li, Cheng

AU - Matsuda, Yuichi

AU - Miyazaki, Satoshi

AU - Nagao, Tohru

AU - Nishizawa, Atsushi J.

AU - Ouchi, Masami

AU - Shimasaku, Kazuhiro

AU - Silverman, John

AU - De la Torre, Sylvain

AU - Tresse, Laurence

AU - Wang, Wei Hao

AU - Willott, Chris J.

AU - Yamada, Toru

AU - Yang, Xiaohu

AU - Yee, Howard K.C.

PY - 2019

Y1 - 2019

N2 - The Canada–France–Hawaii Telescope (CFHT) Large Area U-band Deep Survey (CLAUDS) uses data taken with the MegaCam mosaic imager on CFHT to produce images of 18.60 deg2 with median seeing of FWHM = 0.92 arcsec and to a median depth of U = 27.1 AB (5σ in 2 arcsec apertures), with selected areas that total 1.36 deg2 reaching a median depth of U = 27.7 AB. These are the deepest U-band images assembled to date over this large an area. These data are located in four fields also imaged to comparably faint levels in grizy and several narrowband filters as part of the Hyper Suprime–Cam (HSC) Subaru Strategic Program (HSC-SSP). These CFHT and Subaru data sets will remain unmatched in their combination of area and depth until the advent of the Large Synoptic Survey Telescope. This paper provides an overview of the scientific motivation for CLAUDS and gives details of the observing strategy, observations, data reduction, and data merging with the HSC-SSP. Three early applications of these deep data are used to illustrate the potential of the data set: deep U-band galaxy number counts, z ∼ 3 Lyman break galaxy selection, and photometric redshifts improved by adding CLAUDS U to the Subaru HSC grizy photometry.

AB - The Canada–France–Hawaii Telescope (CFHT) Large Area U-band Deep Survey (CLAUDS) uses data taken with the MegaCam mosaic imager on CFHT to produce images of 18.60 deg2 with median seeing of FWHM = 0.92 arcsec and to a median depth of U = 27.1 AB (5σ in 2 arcsec apertures), with selected areas that total 1.36 deg2 reaching a median depth of U = 27.7 AB. These are the deepest U-band images assembled to date over this large an area. These data are located in four fields also imaged to comparably faint levels in grizy and several narrowband filters as part of the Hyper Suprime–Cam (HSC) Subaru Strategic Program (HSC-SSP). These CFHT and Subaru data sets will remain unmatched in their combination of area and depth until the advent of the Large Synoptic Survey Telescope. This paper provides an overview of the scientific motivation for CLAUDS and gives details of the observing strategy, observations, data reduction, and data merging with the HSC-SSP. Three early applications of these deep data are used to illustrate the potential of the data set: deep U-band galaxy number counts, z ∼ 3 Lyman break galaxy selection, and photometric redshifts improved by adding CLAUDS U to the Subaru HSC grizy photometry.

KW - Cosmology: observations

KW - Dark matter

KW - Galaxies: formation

KW - Galaxies: haloes

KW - Galaxies: statistics

KW - Large-scale structure of universe

UR - http://www.scopus.com/inward/record.url?scp=85075255941&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85075255941&partnerID=8YFLogxK

U2 - 10.1093/mnras/stz2522

DO - 10.1093/mnras/stz2522

M3 - Article

AN - SCOPUS:85075255941

SN - 0035-8711

VL - 489

SP - 5202

EP - 5217

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

The CFHT large area U-band deep survey (CLAUDS)

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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