TY - JOUR

T1 - NEPSC2, the North Ecliptic Pole SCUBA-2 survey

T2 - 850-mu m map and catalogue of 850-mu m-selected sources over 2 deg(2)

AU - Shim, Hyunjin

AU - Kim, Yeonsik

AU - Lee, Dongseob

AU - Lee, Hyung Mok

AU - Goto, Tomo

AU - Matsuhara, Hideo

AU - Scott, Douglas

AU - Serjeant, Stephen

AU - Ao, Yiping

AU - Barrufet, Laia

AU - Chapman, Scott

AU - Clements, David L.

AU - Conselice, Christopher J.

AU - Greve, Thomas R.

AU - Hashimoto, Tetsuya

AU - Hwang, Ho Seong

AU - Im, Myungshin

AU - Jeong, Woong-Seob

AU - Jiang, Linhua

AU - Kim, Minjin

AU - Kim, Seong Jin

AU - Kong, Albert K. H.

AU - Koprowski, Maciej

AU - Marchetti, Lucia

AU - Michalowski, Michal J.

AU - Parsons, Harriet

AU - Pearson, Chris

AU - Seo, Hyunjong

AU - Toba, Yoshiki

AU - White, Glenn

PY - 2020/11

Y1 - 2020/11

N2 - We present an 850-mu m mosaic map and extracted catalogue of submillimetre sources in the extended North Ecliptic Pole (NEP) region over about 2 deg(2). The 850-mu m map is constructed using newly obtained observations by SCUBA-2 at the East Asian Observatory's James Clerk Maxwell Telescope, carried out using the observatory's large programme opportunities. The recent 850-mu m survey has extended the submillimetre data coverage by almost a factor of 4 compared to previous surveys, with a depth of sigma(rms) = 1.0-2.3 mJy beam(-1). The catalogue contains 549 sources selected above a significance level of 4 sigma, where the false-detection rate is 10 per cent; a higher threshold of 4.5 sigma is required in order to achieve a false-detection rate below 3 per cent, which results in 342 sources being selected. Despite the large spatial variation of the noise, the deboosted flux density of sources is comparable to results from the SCUBA-2 Cosmology Legacy Survey, which covered the central 0.6 deg(2) of our survey area with better sensitivity. We construct the source counts at 850 mu m, finding results in agreement with other 850-mu m surveys in cosmological blank fields over S-850 = 4-15 mJy. We find a slight excess of bright galaxies (S-850 > 15 mJy), which can be considered to be at z(phot) = 2-4. The 850-mu m data add valuable long-wavelength information to mid-infrared-selected sources from the AKARI NEP-deep and NEP-wide surveys, which will be helpful in preparing for future near-infrared to millimetre wavelength observations in the NEP region. Our 850-mu m mosaic map and source catalogue will be made publicly available.

AB - We present an 850-mu m mosaic map and extracted catalogue of submillimetre sources in the extended North Ecliptic Pole (NEP) region over about 2 deg(2). The 850-mu m map is constructed using newly obtained observations by SCUBA-2 at the East Asian Observatory's James Clerk Maxwell Telescope, carried out using the observatory's large programme opportunities. The recent 850-mu m survey has extended the submillimetre data coverage by almost a factor of 4 compared to previous surveys, with a depth of sigma(rms) = 1.0-2.3 mJy beam(-1). The catalogue contains 549 sources selected above a significance level of 4 sigma, where the false-detection rate is 10 per cent; a higher threshold of 4.5 sigma is required in order to achieve a false-detection rate below 3 per cent, which results in 342 sources being selected. Despite the large spatial variation of the noise, the deboosted flux density of sources is comparable to results from the SCUBA-2 Cosmology Legacy Survey, which covered the central 0.6 deg(2) of our survey area with better sensitivity. We construct the source counts at 850 mu m, finding results in agreement with other 850-mu m surveys in cosmological blank fields over S-850 = 4-15 mJy. We find a slight excess of bright galaxies (S-850 > 15 mJy), which can be considered to be at z(phot) = 2-4. The 850-mu m data add valuable long-wavelength information to mid-infrared-selected sources from the AKARI NEP-deep and NEP-wide surveys, which will be helpful in preparing for future near-infrared to millimetre wavelength observations in the NEP region. Our 850-mu m mosaic map and source catalogue will be made publicly available.

KW - galaxies: evolution

KW - galaxies: photometry

KW - galaxies: starburst

KW - submillimetre: galaxies

KW - COSMOLOGY LEGACY SURVEY

KW - DEGREE EXTRAGALACTIC SURVEY

KW - DEEP-FIELD-SOUTH

KW - MU-M

KW - SUBMILLIMETER GALAXIES

KW - ALMA SURVEY

KW - STAR-FORMATION

KW - POPULATION

KW - DUST

KW - IDENTIFICATIONS

U2 - 10.1093/mnras/staa2621

DO - 10.1093/mnras/staa2621

M3 - Journal article

VL - 498

SP - 5065

EP - 5079

JO - Royal Astronomical Society. Monthly Notices

JF - Royal Astronomical Society. Monthly Notices

SN - 0035-8711

IS - 4

ER -