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Photometric Redshifts for Galaxies in the GOODS Southern Field | | B. Mobasher
; R. Idzi
; N. Benitez
; A. Cimatti
; S. Cristiani
; E. Daddi
; T. Dahlen
; M. Dickinson
; T. Erben
; H. C. Ferguson
; M. Giavalisco
; N. A. Grogin
; A. M. Koekemoer
; M. Mignoli
; L. A. Moustakas
; M. Nonino
; P. Rosati
; M. Schirmer
; D. Stern
; E. Vanzella
; C. Wolf
; G. Zamorani STScI JHU Osservatorio Astrofisico di Arcetri Osservatorio Astronomico di Trieste ESO Bonn Osservatorio Astrofisico di Bologna JPL Oxford
; | | Date: |
2 Sep 2003 | | Journal: | Astrophys.J. 600 (2004) L167-L170 | | Subject: | astro-ph | | Abstract: | We use extensive multi-wavelength photometric data from the Great Observatories Origins Deep Survey (GOODS) to estimate photometric redshifts for a sample of 434 galaxies with spectroscopic redshifts in the Chandra Deep Field South. Using the Bayesian method, which incorporates redshift/magnitude priors, we estimate photometric redshifts for galaxies in the range 18 < R (AB) < 25.5, giving an rms scatter of 0.11. The outlier fraction is < 10%, with the outlier-clipped rms being 0.047. We examine the accuracy of photometric redshifts for several, special sub--classes of objects. The results for extremely red objects are more accurate than those for the sample as a whole, with rms of 0.051 and very few outliers (3%). Photometric redshifts for active galaxies, identified from their X-ray emission, have a dispersion of 0.104, with 10% outlier fraction, similar to that for normal galaxies. Employing a redshift/magnitude prior in this process seems to be crucial in improving the agreement between photometric and spectroscopic redshifts. | | Source: | arXiv, astro-ph/0309068 | | Services: | Forum | Review | PDF | Favorites | |
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