Identification of AKARI infrared sources by Deep HSC Optical Survey:
  Construction of New Band-Merged Catalogue in the NEP-Wide field
  The north ecliptic pole (NEP) field is a natural deep field location for many
satellite observations. It has been targeted manytimes 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 and
made this field one of the most frequently observed areas witha variety of
facilities, accumulating abundant panchromatic data from X-ray to radio
wavelength range. Recently, a deep opticalsurvey with the Hyper Suprime-Cam
(HSC) at the Subaru telescope covered the NEP-Wide (NEPW) field, which enabled
us toidentify 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 multi-band photometry
for 91,861 AKARI sourcesobserved over the NEPW field. We release a new
band-merged catalogue combining various photometric data from GALEXUV to the
submillimetre (sub-mm) bands (e.g., Herschel/SPIRE, JCMT/SCUBA-2). About 20,000
AKARI sources are newlymatched to the HSC data, most of which seem to be faint
galaxies in the near- to mid-infrared AKARI bands. This cataloguemotivates a
variety of current research, and will be increasingly useful as recently
launched (eROSITA/ART-XC) and futurespace missions (such as JWST, Euclid, and
SPHEREx) plan to take deep observations in the NEP field.
