Identification of AKARI infrared sources by the Deep HSC Optical Survey: construction of a new band-merged catalogue in the North Ecliptic Pole Wide field

ABSTRACT The North Ecliptic Pole field is a natural deep-field location for many satellite observations. It has been targeted many times since it was surveyed by the AKARI space telescope with its unique wavelength coverage from the near- to mid-infrared (mid-IR). Many follow-up observations have be...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2021-01, Vol.500 (3), p.4078-4094
Hauptverfasser: Kim, Seong Jin, Oi, Nagisa, Goto, Tomotsugu, Ikeda, Hiroyuki, Ho, Simon C-C, Shim, Hyunjin, Toba, Yoshiki, Hwang, Ho Seong, Hashimoto, Tetsuya, Barrufet, Laia, Malkan, Matthew, Kim, Helen K, Huang, Ting-Chi, Matsuhara, Hideo, Miyaji, Takamitsu, Pearson, Chris, Serjeant, Stephen, Santos, Daryl Joe D, Kim, Eunbin, Pollo, Agnieszka, Jeong, Woong-Seob, Wang, Ting-Wen, Momose, Rieko, Takagi, Toshinobu
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Sprache:eng
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Zusammenfassung:ABSTRACT The North Ecliptic Pole field is a natural deep-field location for many satellite observations. It has been targeted many times since it was surveyed by the AKARI space telescope with its unique wavelength coverage from the near- to mid-infrared (mid-IR). Many follow-up observations have been carried out, making this field one of the most frequently observed areas with a variety of facilities, accumulating abundant panchromatic data from the X-ray to the radio wavelength range. Recently, a deep optical survey with the Hyper Suprime-Cam (HSC) at the Subaru telescope covered the NEP-Wide (NEPW) field, which enabled us to identify faint sources in the near- and mid-IR bands, and to improve the photometric redshift (photo-z) estimation. In this work, we present newly identified AKARI sources by the HSC survey, along with multiband photometry for 91 861 AKARI sources observed over the NEPW field. We release a new band-merged catalogue combining various photometric data from the GALEX UV to submillimetre (sub-mm) bands (e.g. Herschel/SPIRE, JCMT/SCUBA-2). About ∼20 000 AKARI sources are newly matched to the HSC data, most of which seem to be faint galaxies in the near- to mid-infrared AKARI bands. This catalogue is motivating a variety of current research, and will be increasingly useful as recently launched (eROSITA/ART-XC) and future space missions (such as JWST, Euclid, and SPHEREx) plan to take deep observations in the NEP field.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/staa3359