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Journal article
BAYESIAN HIGH-REDSHIFT QUASAR CLASSIFICATION FROM OPTICAL AND MID-IR PHOTOMETRY
The Astrophysical journal. Supplement series, v 219(2)
01 Aug 2015
Abstract
We identify 885,503 type 1 quasar candidates to i less than or similar to 22 using the combination of optical and mid-IR photometry. Optical photometry is taken from the Sloan Digital Sky Survey-III: Baryon Oscillation Spectroscopic Survey (SDSS-III/BOSS), while mid-IR photometry comes from a combination of data from the Wide-field Infrared Survey Explorer (WISE) "AllWISE" data release and several large-area Spitzer Space Telescope fields. Selection is based on a Bayesian kernel density algorithm with a training sample of 157,701 spectroscopically confirmed type. 1 quasars with both optical and mid-IR data. Of the quasar candidates, 733,713 lack spectroscopic confirmation (and 305,623 are objects that we have not previously classified as photometric quasar candidates). These candidates include 7874 objects targeted as high-probability potential quasars with 3.5 < z < 5 (of which 6779 are new photometric candidates). Our algorithm is more complete to z > 3.5 than the traditional mid-IR selection "wedges" and to 2.2 < z < 3.5 quasars than the SDSS-III/BOSS project. Number counts and luminosity function analysis suggest. that the resulting catalog is relatively complete to known quasars and is identifying new high-z quasars at z > 3. This catalog paves the way for luminosity-dependent clustering investigations of large numbers of faint, high-redshift quasars and for further machine-learning quasar selection using Spitzer and WISE data combined with other large-area optical imaging surveys.
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Details
- Title
- BAYESIAN HIGH-REDSHIFT QUASAR CLASSIFICATION FROM OPTICAL AND MID-IR PHOTOMETRY
- Creators
- Gordon T. Richards - Drexel UniversityAdam D. Myers - Max Planck Institute for AstronomyChristina M. Peters - Drexel UniversityColeman M. Krawczyk - Drexel UniversityGreg Chase - Drexel UniversityNicholas P. Ross - Drexel UniversityXiaohui Fan - Steward Health Care SystemLinhua Jiang - Peking UniversityMark Lacy - National Radio Astronomy ObservatoryIan D. McGreer - University of ArizonaJonathan R. Trump - Pennsylvania State UniversityRyan N. Riegel - Skytree, Inc.
- Publication Details
- The Astrophysical journal. Supplement series, v 219(2)
- Publisher
- Iop Publishing Ltd
- Number of pages
- 21
- Grant note
- New York University University of Chicago Max-Planck-Institute for Astrophysics (MPA) University of Florida U.S. Department of Energy; United States Department of Energy (DOE) Korean Scientist Group Lawrence Berkeley National Laboratory; United States Department of Energy (DOE) Institute for Advanced Study United States Naval Observatory 1378034 / JPL/Caltech Ohio State University Los Alamos National Laboratory; United States Department of Energy (DOE) Alexander von Humboldt Foundation at the Max-Planck-Institut fur Astronomie; Alexander von Humboldt Foundation University of Washington 1107682 / Direct For Mathematical & Physical Scien; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) Princeton University NASA; National Aeronautics & Space Administration (NASA) University of Arizona New Mexico State University Pennsylvania State University Brookhaven National Laboratory; United States Department of Energy (DOE) Japan Participation Group; Sloan Digital Sky Survey (SDSS) University of Portsmouth Brazilian Participation Group Harvard University ST/L00481X/1 / Science and Technology Facilities Council; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) Kavli Institute for Particle Astrophysics and Cosmology American Museum of Natural History Michigan State/Notre Dame/JINA Participation Group Case Western Reserve University University of Virginia National Science Foundation; National Science Foundation (NSF) Max Planck Institute for Astrophysics Johns Hopkins University Max Planck Society; Foundation CELLEX University of Tokyo Spanish Participation Group University of Utah National Aeronautics and Space Administration; National Aeronautics & Space Administration (NASA) Chinese Academy of Sciences (LAMOST); Chinese Academy of Sciences Japanese Monbukagakusho; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Max Planck Institute for Extraterrestrial Physics Vanderbilt University Fermilab University of Pittsburgh University of Basel U.S. Department of Energy Office of Science; United States Department of Energy (DOE) Joint Institute for Nuclear Astrophysics Alfred P. Sloan Foundation Carnegie Mellon University German Participation Group 1411773 / Division Of Astronomical Sciences; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) Instituto de Astrofisica de Canarias Yale University Max-Planck-Institute for Astronomy (MPIA) ST/L00481X/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) French Participation Group Higher Education Funding Council for England; UK Research & Innovation (UKRI); Higher Education Funding Council for England (HEFCE) Astrophysical Institute Potsdam NNX12AI49G; NNX12AE38G / NASA-ADAP Cambridge University; University of Cambridge 1411773; 1211112 / NSF; National Science Foundation (NSF) Drexel University
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000361876600025
- Scopus ID
- 2-s2.0-84940039939
- Other Identifier
- 991019168954204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics