Near-infrared Survey and Photometric Redshifts in the Extended GOODS-North Field
Willner, S. P.
Ashby, Matthew L. N.
Fazio, Giovanni G.
Koo, David C.
AffiliationUniv Arizona, LBT Observ
MetadataShow full item record
PublisherIOP PUBLISHING LTD
CitationLi-Ting Hsu et al 2019 ApJ 871 233
Rights© 2019. The American Astronomical Society. All rights reserved.
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AbstractWe present deep J- and H-band images in the extended Great Observatories Origins Deep Survey-North field covering an area of 0.22 deg(2). The observations were taken using WIRCam on the 3.6 m Canada-France-Hawaii Telescope. Together with the reprocessed K-s-band image, the 5 sigma limiting AB magnitudes (in 2 '' diameter apertures) are 24.7, 24.2, and 24.4 AB. mag in the J, H, and K-s bands, respectively. We also release a multiband photometry and photometric redshift catalog containing 93,598 sources. For non-X-ray sources, we obtained a photometric redshift accuracy sigma(NMAD) = 0.036 with an outlier fraction eta = 7.3%. For X-ray sources, which are mainly active galactic nuclei (AGNs), we cross-matched our catalog with the updated 2M-CDFN X-ray catalog from Xue et al. and found that 658 out of 683 X-ray sources have counterparts. GALEX UV data are included in the photometric redshift computation for the X-ray sources to give sigma(NMAD) = 0.040 with eta = 10.5%. Our approach yields more accurate photometric redshift estimates compared to previous works in this field. In particular, by adopting AGN-galaxy hybrid templates, our approach delivers photometric redshifts for the X-ray counterparts with fewer outliers compared to the 3D-Hubble Space Telescope catalog, which fit these sources with galaxy-only templates.
VersionFinal published version
SponsorsMinistry of Science and Technology of Taiwan [MOST 103-2112-M-001-031-MY3, 106-2112-M-001-034]