Optical Images and Source Catalog of AKARI North Ecliptic Pole Wide Survey Field

Details Optical Images and Source Catalog of AKARI North Ecliptic Pole Wide Survey Field Optical Images and Source Catalog of AKARI North Ecliptic Pole Wide Survey Field

2010-10-18

arxiv.org/abs/1010.3517v1

The Astrophysical Journal Supplement Series, 190:166-180, 2010 September

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

39 pages, 12 figures

Scientific paper

10.1088/0067-0049/190/1/166

We present the source catalog and the properties of the $B-, R-$, and $I-$band images obtained to support the {\it AKARI} North Ecliptic Pole Wide (NEP-Wide) survey. The NEP-Wide is an {\it AKARI} infrared imaging survey of the north ecliptic pole covering a 5.8 deg$^2$ area over 2.5 -- 6 $\micron$ wavelengths. The optical imaging data were obtained at the Maidanak Observatory in Uzbekistan using the Seoul National University 4k $\times$ 4k Camera on the 1.5m telescope. These images cover 4.9 deg$^2$ where no deep optical imaging data are available. Our $B-, R-$, and $I-$band data reach the depths of $\sim$23.4, $\sim$23.1, and $\sim$22.3 mag (AB) at 5$\sigma$, respectively. The source catalog contains 96,460 objects in the $R-$band, and the astrometric accuracy is about 0.15$\arcsec$ at 1$\sigma$ in each RA and Dec direction. These photometric data will be useful for many studies including identification of optical counterparts of the infrared sources detected by {\it AKARI}, analysis of their spectral energy distributions from optical through infrared, and the selection of interesting objects to understand the obscured galaxy evolution.

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