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
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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

  • Author(s): 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
  • et al.
Abstract

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.

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