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Title: The Sloan Digital Sky Survey Quasar Catalog: Twelfth data release

Journal Article · · Astronomy and Astrophysics
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In this paper, we present the Data Release 12 Quasar catalog (DR12Q) from the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey III. This catalog includes all SDSS-III/BOSS objects that were spectroscopically targeted as quasar candidates during the full survey and that are confirmed as quasars via visual inspection of the spectra, have luminosities Mi [z = 2] < -20.5 (in a ΛCDM cosmology with H0 = 70 km s-1 Mpc-1, ΩM = 0.3, and ΩΛ = 0.7), and either display at least one emission line with a full width at half maximum (FWHM) larger than 500 km s-1 or, if not, have interesting/complex absorption features. The catalog also includes previously known quasars (mostly from SDSS-I and II) that were reobserved by BOSS. The catalog contains 297 301 quasars (272 026 are new discoveries since the beginning of SDSS-III) detected over 9376 deg2 with robust identification and redshift measured by a combination of principal component eigenspectra. The number of quasars with z > 2.15 (184 101, of which 167 742 are new discoveries) is about an order of magnitude greater than the number of z > 2.15 quasars known prior to BOSS. Redshifts and FWHMs are provided for the strongest emission lines (C iv, C iii], Mg ii). The catalog identifies 29 580 broad absorption line quasars and lists their characteristics. For each object, the catalog presents five-band (u, g, r, i, z) CCD-based photometry with typical accuracy of 0.03 mag together with some information on the optical morphology and the selection criteria. When available, the catalog also provides information on the optical variability of quasars using SDSS and Palomar Transient Factory multi-epoch photometry. The catalog also contains X-ray, ultraviolet, near-infrared, and radio emission properties of the quasars, when available, from other large-area surveys. The calibrated digital spectra, covering the wavelength region 3600–10 500 Å at a spectral resolution in the range 1300 < R < 2500, can be retrieved from the SDSS Catalog Archive Server. Finally, we also provide a supplemental list of an additional 4841 quasars that have been identified serendipitously outside of the superset defined to derive the main quasar catalog.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
Contributing Organization:
SDSS-III Collaboration
Grant/Contract Number:
AC02-05CH11231; AST-1516784; ANR-08-BLAN-0222; ANR-12-BS05-0015
OSTI ID:
1379664
Journal Information:
Astronomy and Astrophysics, Vol. 597; ISSN 0004-6361
Publisher:
EDP SciencesCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 154 works
Citation information provided by
Web of Science

References (105)

The Tenth data Release of the Sloan Digital sky Survey: First Spectroscopic data from the Sdss-Iii Apache Point Observatory Galactic Evolution Experiment journal March 2014
The Baryon Oscillation Spectroscopic Survey of Sdss-Iii journal December 2012
The Sloan Digital Sky Survey Photometric Camera journal December 1998
The FIRST Survey: Faint Images of the Radio Sky at Twenty Centimeters journal September 1995
Luminosity function from dedicated SDSS-III and MMT data of quasars in 0.7 < z < 4.0 selected with a new approach journal February 2013
The Sdss-Iv Extended Baryon Oscillation Spectroscopic Survey: Overview and Early data journal February 2016
A Simple Likelihood Method for Quasar Target Selection journal November 2011
Mean Spectral Energy Distributions and Bolometric Corrections for Luminous Quasars journal April 2013
First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Determination of Cosmological Parameters journal September 2003
The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: baryon acoustic oscillations in the Data Releases 10 and 11 Galaxy samples journal April 2014
The Sdss-Iv Extended Baryon Oscillation Spectroscopic Survey: Quasar Target Selection journal December 2015
Secondary standard stars for absolute spectrophotometry journal March 1983
Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds journal June 1998
Comparisons of the emission-line and continuum properties of broad absorption line and normal quasi-stellar objects journal May 1991
Exploring the Optical Transient Sky with the Palomar Transient Factory
  • Rau, Arne; Kulkarni, Shrinivas R.; Law, Nicholas M.
  • Publications of the Astronomical Society of the Pacific, Vol. 121, Issue 886 https://doi.org/10.1086/605911
journal December 2009
Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey
  • Hall, Patrick B.; Anderson, Scott F.; Strauss, Michael A.
  • The Astrophysical Journal Supplement Series, Vol. 141, Issue 2 https://doi.org/10.1086/340546
journal August 2002
UNUSUAL BROAD-LINE Mg II EMITTERS AMONG LUMINOUS GALAXIES IN THE BARYON OSCILLATION SPECTROSCOPIC SURVEY journal January 2014
The evolution of optically selected QSOs – II journal December 1988
An Improved Photometric Calibration of the Sloan Digital Sky Survey Imaging Data journal February 2008
The [CLC][ITAL]u[/ITAL][/CLC][arcmin]′[CLC][ITAL]g[/ITAL][/CLC][arcmin]′[CLC][ITAL]r[/ITAL][/CLC][arcmin]′[CLC][ITAL]i[/ITAL][/CLC][arcmin]′[CLC][ITAL]z[/ITAL][/CLC][arcmin]′ Standard-Star System journal April 2002
Efficient Photometric Selection of Quasars from the Sloan Digital Sky Survey: 100,000 z < 3 Quasars from Data Release One
  • Richards, Gordon T.; Nichol, Robert C.; Gray, Alexander G.
  • The Astrophysical Journal Supplement Series, Vol. 155, Issue 2 https://doi.org/10.1086/425356
journal December 2004
The Multi-Object, Fiber-Fed Spectrographs for the Sloan Digital sky Survey and the Baryon Oscillation Spectroscopic Survey journal July 2013
The clustering of intermediate-redshift quasars as measured by the Baryon Oscillation Spectroscopic Survey: Quasar clustering journal June 2012
Spectral Classification and Redshift Measurement for the Sdss-Iii Baryon Oscillation Spectroscopic Survey journal October 2012
The Sloan Digital Sky Survey Photometric System journal April 1996
The Discovery of the First “Changing Look” Quasar: new Insights into the Physics and Phenomenology of Active Galactic Nuclei journal February 2015
The Eleventh and Twelfth data Releases of the Sloan Digital sky Survey: Final data from Sdss-Iii journal July 2015
The Sloan Digital sky Survey Reverberation Mapping Project: Velocity Shifts of Quasar Emission Lines journal October 2016
The Palomar Transient Factory: System Overview, Performance, and First Results
  • Law, Nicholas M.; Kulkarni, Shrinivas R.; Dekany, Richard G.
  • Publications of the Astronomical Society of the Pacific, Vol. 121, Issue 886 https://doi.org/10.1086/648598
journal December 2009
Astrometric Calibration of the Sloan Digital Sky Survey journal March 2003
Quasar-Lyman α forest cross-correlation from BOSS DR11: Baryon Acoustic Oscillations journal May 2014
Variability selected high-redshift quasars on SDSS Stripe 82 journal May 2011
The Sloan Digital Sky Survey monitor telescope pipeline journal November 2006
Discovery and spectrophotometry of the quasars in the -40 deg zone of the CTIO Curtis Schmidt survey journal February 1980
The Sloan Digital Sky Survey quasar catalog: ninth data release journal November 2012
The Sixth Data Release of the Sloan Digital Sky Survey
  • Adelman‐McCarthy, Jennifer K.; Agüeros, Marcel A.; Allam, Sahar S.
  • The Astrophysical Journal Supplement Series, Vol. 175, Issue 2 https://doi.org/10.1086/524984
journal April 2008
The Sloan Digital Sky Survey Quasar Catalog. IV. Fifth Data Release journal May 2007
Quasar Classification Using Color and Variability journal September 2015
The UKIRT Infrared Deep Sky Survey (UKIDSS) journal August 2007
The Sdss-Iii Baryon Oscillation Spectroscopic Survey: the Quasar Luminosity Function from data Release nine journal July 2013
The Sloan Digital Sky Survey quasar catalog: tenth data release journal March 2014
Quasar evolution derived from the Palomar bright quasar survey and other complete quasar surveys journal June 1983
The Sloan Digital Sky Survey: Technical Summary journal September 2000
Constraint on the time variation of the fine-structure constant with the SDSS-III/BOSS DR12 quasar sample journal August 2015
The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: baryon acoustic oscillations in the Data Release 9 spectroscopic galaxy sample journal December 2012
A Photometricity and Extinction Monitor at the Apache Point Observatory journal October 2001
A Survey of [CLC][ITAL]z[/ITAL][/CLC] > 5.8 Quasars in the Sloan Digital Sky Survey. I. Discovery of Three New Quasars and the Spatial Density of Luminous Quasars at [CLC][ITAL]z[/ITAL][/CLC] ∼ 6 journal December 2001
Clustering of intermediate redshift quasars using the final SDSS III-BOSS sample journal September 2015
Photometric Redshifts and Quasar Probabilities from a Single, Data-Driven Generative Model journal March 2012
A strong redshift dependence of the broad absorption line quasar fraction: A redshift dependence of the BALQSO fraction journal December 2010
An accurate Galactic N[SUB]H[/SUB] map of the north ecliptic pole journal December 1994
Sdss-Iii: Massive Spectroscopic Surveys of the Distant Universe, the Milky way, and Extra-Solar Planetary Systems journal August 2011
The Two Micron All Sky Survey (2MASS) journal February 2006
The time Domain Spectroscopic Survey: Variable Selection and Anticipated Results journal June 2015
APM Z >=4 QSO Survey: Spectra and Intervening Absorption Systems journal September 1996
Efficient Photometric Selection of Quasars from the Sloan Digital sky Survey. ii. ∼1, 000, 000 Quasars from data Release 6 journal December 2008
Baryon acoustic oscillations in the Ly α forest of BOSS DR11 quasars journal January 2015
The Palomar Transient Factory photometric catalog 1.0 journal August 2012
The Sloan Digital Sky Survey Quasar Survey: Quasar Luminosity Function from Data Release 3 journal June 2006
A Catalog of Broad Absorption Line Quasars from the Sloan Digital Sky Survey Third Data Release
  • Trump, Jonathan R.; Hall, Patrick B.; Reichard, Timothy A.
  • The Astrophysical Journal Supplement Series, Vol. 165, Issue 1 https://doi.org/10.1086/503834
journal July 2006
Measurement of baryon acoustic oscillations in the Lyman-α forest fluctuations in BOSS data release 9 journal April 2013
The Eighth data Release of the Sloan Digital sky Survey: First data from Sdss-Iii journal March 2011
Selecting Quasars by Their Intrinsic Variability journal April 2010
The Galaxy Evolution Explorer : A Space Ultraviolet Survey Mission journal January 2005
The Sdss-Iii Baryon Oscillation Spectroscopic Survey: Quasar Target Selection for data Release nine journal February 2012
Baryon acoustic oscillations in the Ly α forest of BOSS quasars journal April 2013
High-Redshift sdss Quasars with weak Emission Lines journal June 2009
Sloan Digital Sky Survey: Early Data Release journal January 2002
Measuring Reddening with Sloan Digital sky Survey Stellar Spectra and Recalibrating sfd journal August 2011
Artificial neural networks for quasar selection and photometric redshift determination journal November 2010
The large bright quasar survey. 6: Quasar catalog and survey parameters journal April 1995
The Bell Laboratories H I survey journal March 1992
The 2dF QSO Redshift Survey - XII. The spectroscopic catalogue and luminosity function journal April 2004
The XMM-Newton serendipitous survey: V. The Second XMM-Newton serendipitous source catalogue journal October 2008
A tidal disruption flare in a massive galaxy? Implications for the fuelling mechanisms of nuclear black holes journal July 2015
SDSS-III Baryon Oscillation Spectroscopic Survey Data Release 12: galaxy target selection and large-scale structure catalogues journal November 2015
A Modified Magnitude System that Produces Well-Behaved Magnitudes, Colors, and Errors Even for Low Signal-to-Noise Ratio Measurements journal September 1999
3C 273 : A Star-Like Object with Large Red-Shift journal March 1963
PRELIMINARY RESULTS FROM NEOWISE: AN ENHANCEMENT TO THE WIDE-FIELD INFRARED SURVEY EXPLORER FOR SOLAR SYSTEM SCIENCE journal March 2011
The Sloan Digital sky Survey Quasar Catalog. v. Seventh data Release journal April 2010
A principal component analysis of quasar UV spectra at z  ~  3 journal May 2011
The Wide-Field Infrared Survey Explorer (Wise): Mission Description and Initial On-Orbit Performance journal November 2010
The 2.5 m Telescope of the Sloan Digital Sky Survey journal April 2006
THINK OUTSIDE THE COLOR BOX: PROBABILISTIC TARGET SELECTION AND THE SDSS - XDQSO QUASAR TARGETING CATALOG journal February 2011
The Ninth data Release of the Sloan Digital sky Survey: First Spectroscopic data from the Sdss-Iii Baryon Oscillation Spectroscopic Survey journal November 2012
A Catalog of Broad Absorption line Quasars in Sloan Digital sky Survey data Release 5 journal February 2009
SDSS data management and photometric quality assessment journal October 2004
The ninth data release of the sloan digital sky survey: first spectroscopic data from the sdss-iiI baryon oscillation spectroscopic survey text January 2012
Measurement of baryon acoustic oscillations in the Lyman-α forest fluctuations in BOSS data release 9 text January 2013
The sixth data release of the sloan digital sky survey text January 2008
The Sloan Digital Sky Survey Quasar Catalog IV. Fifth Data Release text January 2007
A Catalog of Broad Absorption Line Quasars in Sloan Digital Sky Survey Data Release 5 text January 2008
Selecting Quasars by their Intrinsic Variability text January 2010
The Sloan Digital Sky Survey Quasar Catalog V. Seventh Data Release text January 2010
A Simple Likelihood Method for Quasar Target Selection text January 2011
The Sloan Digital Sky Survey quasar catalog: ninth data release text January 2012
The SDSS-III Baryon Oscillation Spectroscopic Survey: The Quasar Luminosity Function from Data Release Nine text January 2012
Constraint on the time variation of the fine-structure constant with the SDSS-III/BOSS DR12 quasar sample text January 2015
Quasar Classification Using Color and Variability text January 2015
SDSS-III Baryon Oscillation Spectroscopic Survey Data Release 12: galaxy target selection and large scale structure catalogues preprint January 2015
SDSS Data Management and Photometric Quality Assessment text January 2004
The 2.5 m Telescope of the Sloan Digital Sky Survey text January 2006
A Catalog of Broad Absorption Line Quasars from the Sloan Digital Sky Survey Third Data Release text January 2006
The UKIRT Infrared Deep Sky Survey (UKIDSS) text January 2006
An Improved Photometric Calibration of the Sloan Digital Sky Survey Imaging Data text January 2007

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
catalogs
surveys
quasars