The Sloan Digital Sky Survey Quasar Catalog. 4. Fifth Data Release

Journal Article · Sun Apr 01 04:00:00 EDT 2007 · Astron.J.134:102-117,2007

DOI:https://doi.org/10.1086/518474· OSTI ID:910194

Schneider, Donald P; Hall, Patrick B; Richards, Gordon T; Strauss, Michael A; Vanden Berk, Daniel E; Anderson, Scott F; Brandt, W N; Fan, Xiao-Hui; Jester, Sebastian; Gray, Jim; Gunn, James E

We present the fourth edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog contains 77,429 objects; this is an increase of over 30,000 entries since the previous edition. The catalog consists of the objects in the SDSS Fifth Data Release that have luminosities larger than M{sub i} = -22.0 (in a cosmology with H{sub 0} = 70 km s{sup -1} Mpc{sup -1}, {Omega}{sub M} = 0.3, and {Omega}{sub {Lambda}} = 0.7), have at least one emission line with FWHM larger than 1000 km s{sup -1} or have interesting/complex absorption features, are fainter than i {approx} 15.0, and have highly reliable redshifts. The area covered by the catalog is {approx} 5740 deg{sup 2}. The quasar redshifts range from 0.08 to 5.41, with a median value of 1.48; the catalog includes 891 quasars at redshifts greater than four, of which 36 are at redshifts greater than five. Approximately half of the catalog quasars have i < 19; nearly all have i < 21. For each object the catalog presents positions accurate to better than 0.2-minutes rms per coordinate, five-band (ugriz) CCD-based photometry with typical accuracy of 0.03 mag, and information on the morphology and selection method. The catalog also contains basic radio, near-infrared, and X-ray emission properties of the quasars, when available, from other large-area surveys. The calibrated digital spectra cover the wavelength region 3800-9200 {angstrom} at a spectral resolution of {approx_equal} 2000; the spectra can be retrieved from the public database using the information provided in the catalog. The average SDSS colors of quasars as a function of redshift, derived from the catalog entries, are presented in tabular form. Approximately 96% of the objects in the catalog were discovered by the SDSS.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 910194
• Report Number(s): FERMILAB-PUB-07-121-CD; arXiv eprint number arXiv:0704.0806
• Journal Information: Astron.J.134:102-117,2007, Journal Name: Astron.J.134:102-117,2007 Vol. 134; ISSN 0004-6256; ISSN ANJOAA
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
ACCURACY
Astrophysics
COSMOLOGY
MORPHOLOGY
PHOTOMETRY
QUASARS
RESOLUTION
SKY
SPECTRA
WAVELENGTHS