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  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29086
Title: AGN Populations in Large-volume X-Ray Surveys: Photometric Redshifts and Population Types Found in the Stripe 82X Survey
Authors: Ananna, Tonima Tasnim
Salvato, Mara
LaMassa, Stephanie
Urry, C. Megan
CAPPELLUTI, Nico
Cardamone, Carolin
Civano, Francesca
Farrah, Duncan
Gilfanov, Marat
Glikman, Eilat
Hamilton, Mark
Kirkpatrick, Allison
LANZUISI, Giorgio 
MARCHESI, STEFANO 
Merloni, Andrea
Nandra, Kirpal
Natarajan, Priyamvada
Richards, Gordon T.
Timlin, John
Issue Date: 2017
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 850
Issue: 1
First Page: 66
Abstract: Multiwavelength surveys covering large sky volumes are necessary to obtain an accurate census of rare objects such as high-luminosity and/or high-redshift active galactic nuclei (AGNs). Stripe 82X is a 31.3 X-ray survey with Chandra and XMM-Newton observations overlapping the legacy Sloan Digital Sky Survey Stripe 82 field, which has a rich investment of multiwavelength coverage from the ultraviolet to the radio. The wide-area nature of this survey presents new challenges for photometric redshifts for AGNs compared to previous work on narrow-deep fields because it probes different populations of objects that need to be identified and represented in the library of templates. Here we present an updated X-ray plus multiwavelength matched catalog, including Spitzer counterparts, and estimated photometric redshifts for 5961 (96% of a total of 6181) X-ray sources that have a normalized median absolute deviation, σ<SUB>nmad</SUB>=0.06, and an outlier fraction, η = 13.7%. The populations found in this survey and the template libraries used for photometric redshifts provide important guiding principles for upcoming large-area surveys such as eROSITA and 3XMM (in X-ray) and the Large Synoptic Survey Telescope (optical).
URI: http://hdl.handle.net/20.500.12386/29086
URL: https://iopscience.iop.org/article/10.3847/1538-4357/aa937d
ISSN: 0004-637X
DOI: 10.3847/1538-4357/aa937d
Bibcode ADS: 2017ApJ...850...66A
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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