Abstract
We present photometric redshifts and associated probability distributions for all detected sources in the Extended Chandra Deep Field South (ECDFS). This work makes use of the most up-to-date data from the Cosmic Assembly Near-IR Deep Legacy Survey (CANDELS) and the Taiwan ECDFS Near-Infrared Survey (TENIS) in addition to other data. We also revisit multi-wavelength counterparts for published X-ray sources from the 4 Ms CDFS and 250 ks ECDFS surveys, finding reliable counterparts for 1207 out of 1259 sources (~96%). Data used for photometric redshifts include intermediate-band photometry deblended using the TFIT method, which is used for the first time in this work. Photometric redshifts for X-ray source counterparts are based on a new library of active galactic nuclei/galaxy hybrid templates appropriate for the faint X-ray population in the CDFS. Photometric redshift accuracy for normal galaxies is 0.010 and for X-ray sources is 0.014 and outlier fractions are 4% and 5.2%, respectively. The results within the CANDELS coverage area are even better, as demonstrated both by spectroscopic comparison and by galaxy-pair statistics. Intermediate-band photometry, even if shallow, is valuable when combined with deep broadband photometry. For best accuracy, templates must include emission lines.
Document Type
Article
Publication Date
11-5-2014
Digital Object Identifier (DOI)
http://dx.doi.org/10.1088/0004-637X/796/1/60
Funding Information
This work was supported by program number HST GO-12060 provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. . . . This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech. M. Brusa acknowledges support from the FP7 Career Integration Grant "eEASy" (CIG 321913).
Related Content
This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA.
Repository Citation
Hsu, Li-Ting; Salvato, Mara; Nandra, Kirpal; Brusa, Marcella; Bender, Ralf; Buchner, Johannes; Dooley, Jennifer L.; Kocevski, Dale D.; Guo, Yicheng; Hathi, Nimish P.; Rangel, Cyprian; Willner, S. P.; Brightman, Murray; Georgakakis, Antonis; Budavári, Tamás; Szalay, Alexander S.; Ashby, Matthew L.N.; Barro, Guillermo; Dahlen, Tomas; Faber, Sandra M.; Ferguson, Henry C.; Galametz, Audrey; Grazian, Andrea; Grogin, Norman A.; Huang, Kuang-Han; Koekemoer, Anton M.; Lucas, Ray A.; McGrath, Elizabeth; Mobasher, Bahram; Peth, Michael; Rosario, David J.; and Trump, Jonathan R., "CANDELS/GOODS-S, CDFS, and ECDFS: Photometric Redshifts for Normal and X-Ray-Detected Galaxies" (2014). Physics and Astronomy Faculty Publications. 265.
https://uknowledge.uky.edu/physastron_facpub/265
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Notes/Citation Information
Published in The Astrophysical Journal, v. 796, no. 1, article 60, p. 1-22.
© 2014. The American Astronomical Society. All rights reserved.
Reproduced by permission of the AAS.