The Sloan Digital Sky Survey Quasar Catalog. I. Early Data Release

By D. Schneider, Gordon Richards, Xiaohui Fan, P. Hall, M. Strauss, D. V. vanden Berk, James E. Gunn, Heidi Jo Newberg, T. Reichard, C. Stoughton and 55 more. 2001

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We present the first edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog consists of the 3814 objects (3000 discovered by the SDSS) in the initial SDSS public data release that have at least one emission line with a full width at half-maximum larger than 1000 km s-1, luminosities brighter than Mi* = -23, and highly reliable redshifts. The area covered by the catalog is 494 deg2; the majority of the objects were found in SDSS commissioning data using a multicolor selection technique. The quasar redshifts range from 0.15 to 5.03. For each object the catalog presents positions accurate to better than 0.″2 rms per coordinate, five-band (ugriz) CCD-based photometry with typical accuracy of 0.05 mag, radio and X-ray emission properties, and information on the morphology and selection method. Calibrated spectra of all objects in the catalog, covering the wavelength region 3800–9200 Å at a spectral resolution of 1800–2100, are also available. Since the quasars were selected during the commissioning period, a time when the quasar selection algorithm was undergoing frequent revisions, the sample is not homogeneous and is not intended for statistical analysis.

Subfields: Astronomy and Astrophysics

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Citations in the corpus

THE SLOAN DIGITAL SKY SURVEY QUASAR CATALOG. V. SEVENTH DATA RELEASE (2010, methodology): “Previous versions of the catalog (Schneider et al. 2002, 2003, 2005, 2007, hereafter Papers I, II, III, and IV, respectively) were published with the SDSS Early Data Release (EDR; Stoughton et al. 2002), the SDSS First Data Release (DR1; Abazajian et al. 2003), the 2360 SDSS Third Data Release…”
Quasar Microlensing at High Magnification and the Role of Dark Matter: Enhanced Fluctuations and Suppressed Saddle Points (2002, background): “In particular, the Hamburg-ESO survey (Wisotzki et al. 1996) and the Sloan Digital Sky Survey (Schneider et al. 2002) will ultimately yield a large number of lenses.”
Spectral Classification of Quasars in the Sloan Digital Sky Survey: Eigenspectra, Redshift, and Luminosity Effects (2004, background): “Spectroscopic observations are discussed in detail by York et al. (2000), Castander et al. (2001), Stoughton et al. (2002), and Schneider et al. (2002).”
Red and Reddened Quasars in the Sloan Digital Sky Survey (2003, methodology): “Furthermore, the optical spectral index of quasars is a function of the continuum windows used and therefore depends on redshift (see, e.g., Vanden Berk et al. 2001; Schneider et al. 2002; Pentericci et al. 2003).”
Optical and Radio Properties of Extragalactic Sources Observed by the FIRST Survey and the Sloan Digital Sky Survey (2002, methodology): “In our analysis we use the quasar redshifts produced by the SDSS spectroscopic pipelines; tests have shown that these redshifts are correct for approximately 97% of the objects (Schneider et al. 2002).”
The Sloan Digital Sky Survey quasar catalog: ninth data release (2012, methodology): “This catalog keeps the tradition of producing quasar catalogs (Schneider et al. 2002, 2003, 2005, 2007, 2010) from SDSS-I and II (York et al. 2000).”
Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey (2002, background): “In the redshift range 1.485 < z < 3.9 where selection of both HiBALs (via C iv) and LoBALs (via Mg ii or Al iii) is possible, there are 1807 quasars in the SDSS EDR quasar sample (Schneider et al. 2002).”
Active Galactic Nuclei in the Sloan Digital Sky Survey. II. Emission-Line Luminosity Function (2005, methodology): “Based on the general quasar color model (Schneider et al. 2002, 2003; Hopkins et al. 2004), we found g i 0:55 at around z 0:1.”
The Sloan Digital Sky Survey Quasar Catalog. IV. Fifth Data Release (2007, methodology): “Previous versions of the catalog (Schneider et al. 2002, hereafter Paper I; Schneider et al. 2003, hereafter Paper II; Schneider et al. 2005, hereafter Paper III ) were published with the SDSS Early Data Release (EDR; Stoughton et al. 2002), the SDSS First Data Release (DR1; Abazajian et al. 2003),…”
Mapping extreme-scale alignments of quasar polarization vectors (2005, methodology): “The targets were mainly selected from the Véron catalogue (Véron-Cetty & Véron 2001) and from the Sloan Digital Sky Survey Early and First Data Releases (Schneider et al. 2002, 2003; Reichard et al. 2003).”
X-Ray Emission from Radio-Quiet Quasars in the Sloan Digital Sky Survey Early Data Release: The αox Dependence upon Ultraviolet Luminosity (2002, methodology): “To derive absolute luminosities for the SDSS quasars, the catalog magnitudes were first corrected for Galactic absorption using the COBE DIRBE maps of Schlegel, Finkbeiner, & Davis (1998) and the scaling laws for the five SDSS filters reported in Schneider et al. (2002).”
Further evidence for a variable fine-structure constant from Keck/HIRES QSO absorption spectra (2003, background): “Recently, Bahcall, Steinhardt & Schlegel (2003) analysed 44 [OIII ] doublet QSO emission lines from the Sloan Digital Sky Survey Early Data Release (Schneider et al. 2002).”
Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Quasar Sample (2002, background): “Of the 3814 quasars in the Early Data Release (EDR) quasar sample (Schneider et al. 2002), there were only 23 objects which were radio-selected only; a composite of these 23 objects shows that they are quite reddened and tend to be low-ionization BAL quasars.”
Continuum and Emission-Line Properties of Broad Absorption Line Quasars (2003, methodology): “In this paper we add to these previous results by investigating the continuum and emission-line properties of a catalog of 224 BALQSOs (Reichard et al. 2003) that were drawn from the SDSS EDR Quasar Catalog (Schneider et al. 2002).”