skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A Study of Quasar Selection in the Supernova Fields of the Dark Energy Survey

Journal Article · · The Astronomical Journal (Online)
ORCiD logo; ; ; ; ORCiD logo; ; ORCiD logo; ; ; ; ; ; ORCiD logo; ; ; ORCiD logo; ; ORCiD logo; ; more »; ; ; ; ; ORCiD logo; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ORCiD logo; ORCiD logo; ; ORCiD logo; ; ; ; ; ; ; ; ORCiD logo; ; ; ; ; ORCiD logo; ; ; ; ; ; ; ; ; ; ORCiD logo; ; ; ; ORCiD logo; ; ORCiD logo « less

In this paper, we present a study of quasar selection using the supernova fields of the Dark Energy Survey (DES). We used a quasar catalog from an overlapping portion of the SDSS Stripe 82 region to quantify the completeness and efficiency of selection methods involving color, probabilistic modeling, variability, and combinations of color/probabilistic modeling with variability. In all cases, we considered only objects that appear as point sources in the DES images. We examine color selection methods based on the Wide-field Infrared Survey Explorer (WISE) mid-IR W1-W2 color, a mixture of WISE and DES colors (g - i and i-W1), and a mixture of Vista Hemisphere Survey and DES colors (g - i and i - K). For probabilistic quasar selection, we used XDQSO, an algorithm that employs an empirical multi-wavelength flux model of quasars to assign quasar probabilities. Our variability selection uses the multi-band χ 2-probability that sources are constant in the DES Year 1 griz-band light curves. The completeness and efficiency are calculated relative to an underlying sample of point sources that are detected in the required selection bands and pass our data quality and photometric error cuts. We conduct our analyses at two magnitude limits, i < 19.8 mag and i < 22 mag. For the subset of sources with W1 and W2 detections, the W1-W2 color or XDQSOz method combined with variability gives the highest completenesses of >85% for both i-band magnitude limits and efficiencies of >80% to the bright limit and >60% to the faint limit; however, the giW1 and giW1+variability methods give the highest quasar surface densities. The XDQSOz method and combinations of W1W2/giW1/XDQSOz with variability are among the better selection methods when both high completeness and high efficiency are desired. We also present the OzDES Quasar Catalog of 1263 spectroscopically confirmed quasars from three years of OzDES observation in the 30 deg 2 of the DES supernova fields. Finally, the catalog includes quasars with redshifts up to z ~ 4 and brighter than i = 22 mag, although the catalog is not complete up to this magnitude limit.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); The Ohio State Univ., Columbus, OH (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
Contributing Organization:
The DES Collaboration
Grant/Contract Number:
AC02-07CH11359; AC05-00OR22725; AYA2012-39559; ESP2013-48274; FPA2013-47986; SEV-2012-0234; AC02-76SF00515; SC0015525; SC0011726
OSTI ID:
1347129
Alternate ID(s):
OSTI ID: 1347343; OSTI ID: 1369470; OSTI ID: 1477757
Report Number(s):
arXiv:1611.05456; FERMILAB-PUB-16-472; DOE-OSU-15525; 1498636
Journal Information:
The Astronomical Journal (Online), Vol. 153, Issue 3; ISSN 1538-3881
Publisher:
IOP Publishing - AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

References (80)

The Seventh data Release of the Sloan Digital sky Survey journal May 2009
The Eighth data Release of the Sloan Digital sky Survey: First data from Sdss-Iii journal March 2011
Measuring and modelling the redshift evolution of clustering: the Hubble Deep Field North journal December 1999
LOW-RESOLUTION SPECTRAL TEMPLATES FOR ACTIVE GALACTIC NUCLEI AND GALAXIES FROM 0.03 TO 30 μm journal March 2010
MID-INFRARED SELECTION OF ACTIVE GALACTIC NUCLEI WITH THE WIDE-FIELD INFRARED SURVEY EXPLORER . II. PROPERTIES OF WISE -SELECTED ACTIVE GALACTIC NUCLEI IN THE NDWFS BOÖTES FIELD journal July 2013
Astropy: A community Python package for astronomy journal September 2013
Combining Dark Energy Survey Science Verification data with near-infrared data from the ESO VISTA Hemisphere Survey journal November 2014
Supernova Simulations and Strategies for the dark Energy Survey journal June 2012
SExtractor: Software for source extraction journal June 1996
Reverberation mapping of the emission line regions of Seyfert galaxies and quasars journal April 1982
THINK OUTSIDE THE COLOR BOX: PROBABILISTIC TARGET SELECTION AND THE SDSS - XDQSO QUASAR TARGETING CATALOG journal February 2011
Extreme deconvolution: Inferring complete distribution functions from noisy, heterogeneous and incomplete observations journal June 2011
Photometric Redshifts and Quasar Probabilities from a Single, Data-Driven Generative Model journal March 2012
Light and motion in SDSS Stripe 82: the catalogues journal May 2008
Optimal Time-Series Selection of Quasars journal February 2011
The 2QDES Pilot: the luminosity and redshift dependence of quasar clustering journal March 2016
A uv to Mid-Ir Study of agn Selection journal July 2014
The 2dF QSO Redshift Survey - XII. The spectroscopic catalogue and luminosity function journal April 2004
THE DISCOVERY OF Y DWARFS USING DATA FROM THE WIDE-FIELD INFRARED SURVEY EXPLORER ( WISE ) journal November 2011
The Baryon Oscillation Spectroscopic Survey of Sdss-Iii journal December 2012
Long-Term Variability of Sloan Digital Sky Survey Quasars journal September 2003
Baryon acoustic oscillations in the Ly α forest of BOSS DR11 quasars journal January 2015
The Blanco Cosmology Survey: data Acquisition, Processing, Calibration, Quality Diagnostics, and data Release journal September 2012
The dark energy survey and operations: years 1 to 3 conference July 2016
Quasar probabilities and redshifts from WISE mid-IR through GALEX UV photometry journal July 2015
Eight Ultra-Faint Galaxy Candidates Discovered in year two of the dark Energy Survey journal November 2015
CFHTLenS: the Canada–France–Hawaii Telescope Lensing Survey – imaging data and catalogue products journal June 2013
The Dark Energy Survey journal June 2005
The dark Energy Camera journal October 2015
Quasar-Lyman α forest cross-correlation from BOSS DR11: Baryon Acoustic Oscillations journal May 2014
CFHTLenS: the Canada–France–Hawaii Telescope Lensing Survey: CFHTLenS journal October 2012
Marz: Manual and automatic redshifting software journal April 2016
The variability of optically selected quasars journal May 1994
Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas journal May 1953
The 6dF Galaxy Survey: samples, observational techniques and the first data release journal December 2004
The Pan-STARRS wide-field optical/NIR imaging survey conference July 2010
Are the Variations in Quasar Optical flux Driven by Thermal Fluctuations? journal May 2009
Mass Functions of Supermassive Black Holes across Cosmic Time journal January 2012
Simulations of the OzDES AGN reverberation mapping project journal August 2015
A Simple Likelihood Method for Quasar Target Selection journal November 2011
THE FIRST HUNDRED BROWN DWARFS DISCOVERED BY THE WIDE-FIELD INFRARED SURVEY EXPLORER ( WISE ) journal November 2011
The Two Micron All Sky Survey: Survey Rationale and Initial Testing journal July 1994
SEVEN-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE ( WMAP ) OBSERVATIONS: COSMOLOGICAL INTERPRETATION journal January 2011
Quasars to B greater than 22.5 in selected area 57 - A catalog of multicolor photometry, variability, and astrometry journal March 1986
Quantifying Quasar Variability as part of a General Approach to Classifying Continuously Varying Sources journal December 2009
Obscured and Unobscured Active Galactic Nuclei in the Spitzer Space Telescope First Look Survey journal September 2004
The VIMOS VLT deep survey: First epoch VVDS-deep survey: 11 564 spectra with 17.5  journal August 2005
The Anglo-Australian Observatory 2dF facility journal June 2002
Modeling the time Variability of sdss Stripe 82 Quasars as a Damped Random walk journal September 2010
The large area KX quasar catalogue - I. Analysis of the photometric redshift selection and the complete quasar catalogue: The large area KX quasar catalogue journal July 2012
INITIAL PERFORMANCE OF THE NEOWISE REACTIVATION MISSION journal August 2014
PRELIMINARY RESULTS FROM NEOWISE: AN ENHANCEMENT TO THE WIDE-FIELD INFRARED SURVEY EXPLORER FOR SOLAR SYSTEM SCIENCE journal March 2011
Bayesian galaxy shape measurement for weak lensing surveys – III. Application to the Canada–France–Hawaii Telescope Lensing Survey journal January 2013
The Dark Energy Survey data processing and calibration system conference September 2012
The Sdss-Iv Extended Baryon Oscillation Spectroscopic Survey: Quasar Target Selection journal December 2015
Absolute Spectral Energy Distributions for White Dwarfs journal February 1974
Variability selected high-redshift quasars on SDSS Stripe 82 journal May 2011
Quasar Classification Using Color and Variability journal September 2015
Reverberation mapping of active galactic nuclei journal March 1993
DES J0454−4448: discovery of the first luminous z ≥ 6 quasar from the Dark Energy Survey journal October 2015
Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Quasar Sample journal June 2002
Efficient Photometric Selection of Quasars from the Sloan Digital sky Survey. ii. ∼1, 000, 000 Quasars from data Release 6 journal December 2008
The Sloan Digital Sky Survey Quasar Survey: Quasar Luminosity Function from Data Release 3 journal June 2006
The Sdss-Iii Baryon Oscillation Spectroscopic Survey: Quasar Target Selection for data Release nine journal February 2012
Optical Identification of New Quasi-Stellar Radio Sources. journal October 1965
Measuring Reddening with Sloan Digital sky Survey Stellar Spectra and Recalibrating sfd journal August 2011
Selecting Quasars by Their Intrinsic Variability journal April 2010
The Sloan Digital sky Survey Quasar Catalog. v. Seventh data Release journal April 2010
Exploring the Variable Sky with the Sloan Digital Sky Survey journal October 2007
AAOmega: a multipurpose fiber-fed spectrograph for the AAT conference September 2004
MID-INFRARED SELECTION OF ACTIVE GALACTIC NUCLEI WITH THE WIDE-FIELD INFRARED SURVEY EXPLORER . I. CHARACTERIZING WISE -SELECTED ACTIVE GALACTIC NUCLEI IN COSMOS journal June 2012
An Empirical Calibration of the Completeness of the SDSS Quasar Survey journal May 2005
The Ensemble Photometric Variability of ∼25,000 Quasars in the Sloan Digital Sky Survey journal February 2004
The KX method for producing K-band flux-limited samples of quasars journal March 2000
The Wide-Field Infrared Survey Explorer (Wise): Mission Description and Initial On-Orbit Performance journal November 2010
SDSS QUASARS IN THE WISE PRELIMINARY DATA RELEASE AND QUASAR CANDIDATE SELECTION WITH OPTICAL/INFRARED COLORS journal July 2012
THE CHANDRA DEEP FIELD-SOUTH SURVEY: 4 Ms SOURCE CATALOGS journal June 2011
Artificial neural networks for quasar selection and photometric redshift determination journal November 2010
The Sloan Digital Sky Survey: Technical Summary journal September 2000
OzDES multifibre spectroscopy for the Dark Energy Survey: first-year operation and results journal July 2015

Cited By (13)

C iv black hole mass measurements with the Australian Dark Energy Survey (OzDES) journal June 2019
Brown dwarf census with the Dark Energy Survey year 3 data and the thin disc scale height of early L types journal September 2019
HELP: a catalogue of 170 million objects, selected at 0.36–4.5 μm, from 1270 deg2 of prime extragalactic fields journal September 2019
Quasar Accretion Disk Sizes from Continuum Reverberation Mapping from the Dark Energy Survey journal July 2018
Identifying Tidal Disruption Events via Prior Photometric Selection of Their Preferred Hosts journal November 2018
Finding the Brightest Cosmic Beacons in the Southern Hemisphere journal December 2019
The QUEST-La Silla AGN Variability Survey: Selection of AGN Candidates through Optical Variability journal May 2019
Quasar Accretion Disk Sizes from Continuum Reverberation Mapping in the DES Standard-star Fields journal January 2020
Quasar Accretion Disk Sizes from Continuum Reverberation Mapping from the Dark Energy Survey text January 2018
Help: A catalogue of 170 million objects, selected at 0.36–4.5 μm, from 1270 deg2 of prime extragalactic fields text January 2019
Quasar Accretion Disk Sizes from Continuum Reverberation Mapping in the DES Standard Star Fields text January 2018
CIV Black Hole Mass Measurements with the Australian Dark Energy Survey (OzDES) text January 2019
HELP: A catalogue of 170 million objects, selected at 0.36-4.5 $μ$m, from 1270 deg.$^{2}$ of prime extragalactic fields text January 2019


Similar Records

SDSS QUASARS IN THE WISE PRELIMINARY DATA RELEASE AND QUASAR CANDIDATE SELECTION WITH OPTICAL/INFRARED COLORS
Journal Article · Wed Aug 15 00:00:00 EDT 2012 · Astronomical Journal (New York, N.Y. Online) · OSTI ID:1347129

THINK OUTSIDE THE COLOR BOX: PROBABILISTIC TARGET SELECTION AND THE SDSS-XDQSOQUASAR TARGETING CATALOG
Journal Article · Thu Mar 10 00:00:00 EST 2011 · Astrophysical Journal · OSTI ID:1347129

Wise detections of known QSOs at redshifts greater than six
Journal Article · Sun Dec 01 00:00:00 EST 2013 · Astrophysical Journal · OSTI ID:1347129