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.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at email@example.com.
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]