Optical - Near-Infrared catalogue for the AKARI North Ecliptic Pole Deep Field

Abstract

Aims. We present an 8-band (u*, g', r', i', z', Y, J, Ks) optical to NIR deep photometric catalog based on the observations made with MegaCam and WIRCam at CFHT, and compute photometric redshifts, zp in the North Ecliptic Pole (NEP) region. Our catalog provides us to identify the counterparts, and zp for AKARI NIR/MIR sources. Results. The estimated 4sigma detection limits within an 1" aperture radius are 26.7, 25.9, 25.1, and 24.1 mag [AB] for g', r', i', and z'-bands and 23.4, 23.0, and 22.7 mag for Y, J, and Ks-bands, respectively. There are a total of 85797 sources in the band-merged catalog. An astrometric accuracy of this catalog determined by examining coordinate offsets with regard to 2MASS is 0.013" with a root mean square offset of 0.32". We distinguish 5441 secure stars from extended sources using u*-J vs. g'-Ks colors, combined with the SExtractor stellarity index of the images. Comparing with galaxy spectroscopic redshifts, we find a photometric redshift dispersion, sigma_(dz/(1+z)), of 0.032 and catastrophic failure rate, dz/(1+z)>0.15, of 5.8% at z<1, while a dispersion of 0.117 and a catastrophic failures rate of 16.6% at z>1. We extend estimate of the zp uncertainty over the full magnitude/redshift space with a redshift probability distribution function and find that our redshift are highly accurate with z'<22 at zp<2.5 and for fainter sources with z'<24 at z<1. From the investigation of photometric properties of AKARI infrared sources (23354 sources) using the g'z'Ks diagram, <5% of AKARI sources with optical counterparts are classified as high-z (1.4<z<2.5) star-forming galaxies. Among the high-z star-forming galaxies, AKARI MIR detected sources seem to be affected by stronger dust extinction compared with sources with non-detections in the AKARI MIR bands. The full, electronic version of our catalog with zp will be available at the CDS.

14 pages, 15 figures, accepted for publication in A&A

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Cited by in corpus (25)

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• Identification of AKARI infrared sources by Deep HSC Optical Survey: Construction of New Band-Merged Catalogue in the NEP-Wide field
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• An Active Galactic Nucleus Recognition Model based on Deep Neural Network
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• Photometric Redshifts in the North Ecliptic Pole Wide Field based on a Deep Optical Survey with Hyper Suprime-Cam
• Linking galaxies to dark matter haloes at $z\sim 1$ : dependence of galaxy clustering on stellar mass and specific star formation rate
• AKARI near-infrared background fluctuations arise from normal galaxy populations
• Variation of optical and infrared properties of galaxies with their surface brightness
• Environmental Effects on AGN activity via Extinction-free Mid-Infrared Census
• High Excitation Emission Line Nebula associated with an Ultra Luminous X-ray Source at $z=$ 0.027 in the \textit{AKARI} North Ecliptic Pole Deep Field
• Optically-detected galaxy cluster candidates in the $AKARI$ North Ecliptic Pole field based on photometric redshift from Subaru Hyper Suprime-Cam
• Active galactic nuclei catalog from the AKARI NEP Wide field
• Chandra Survey in the AKARI North Ecliptic Pole Deep Field Optical/Infrared Identifications of X-ray Sources
• The Calibration of Polycyclic Aromatic Hydrocarbon Dust Emission as a Star Formation Rate Indicator in the AKARI NEP Survey
• A GMRT 610 MHz radio survey of the North Ecliptic Pole (NEP, ADF-N) / Euclid Deep Field North