Near-infrared Survey and Photometric Redshifts in the Extended GOODS-North Field

Hsu, Li-Ting; Lin, Lihwai; Dickinson, Mark; Yan, Haojing; Bau-Ching, Hsieh; Wang, Wei-Hao; Lee, Chien-Hsiu; Yan, Chi-Hung; Scott, Douglas; Willner, S. P.; Ouchi, Masami; Ashby, Matthew L. N.; Chen, Yi-Wen; Daddi, Emanuele; Elbaz, David; Fazio, Giovanni G.; Foucaud, Sebastien; Huang, Jiasheng; Koo, David C.; Morrison, Glenn; Owen, Frazer; Pannella, Maurilio; Pope, Alexendra; Simard, Luc und Wang, Shiang-Yu (2019): Near-infrared Survey and Photometric Redshifts in the Extended GOODS-North Field. In: Astrophysical Journal, Bd. 871, Nr. 2, 233

Abstract

We 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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0004-637X
• Sprache: Englisch