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Date and Time of the Query: 2018-12-11 T03:36:38 PST
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For refcode 2006ApJS..165....1T:
Retrieve 4784 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
2006ApJS..165....1T A Catalog of Broad Absorption Line Quasars from the Sloan Digital Sky Survey Third Data Release Jonathan R. Trump, Patrick B. Hall, Timothy A. Reichard, Gordon T. Richards, Donald P. Schneider, Daniel E. Vanden Berk, Gillian R. Knapp, Scott F. Anderson, Xiaohui Fan, J. Brinkman, S. J. Kleinman, and Atsuko Nitta Abstract. We present a total of 4784 unique broad absorption line quasars from the Sloan Digital Sky Survey Third Data Release. An automated algorithm was used to match a continuum to each quasar and to identify regions of flux at least 10% below the continuum over a velocity range of at least 1000 km s^-1^ in the CIV and MgII absorption regions. The model continuum was selected as the best-fit match from a set of template quasar spectra binned in luminosity, emission line width, and redshift, with the power-law spectral index and amount of dust reddening as additional free parameters. We characterize our sample through the traditional "balnicity" index and a revised absorption index, as well as through parameters such as the width, outflow velocity, fractional depth, and number of troughs. From a sample of 16,883 quasars at 1.7<=z<=4.38, we identify 4386 (26.0%) quasars with broad CIV absorption, of which 1756 (10.4%) satisfy traditional selection criteria. From a sample of 34,973 quasars at 0.5<=z<=2.15, we identify 457 (1.31%) quasars with broad MgII absorption, 191 (0.55%) of which satisfy traditional selection criteria. We also provide a supplementary list of 39 visually identified z>4.38 quasars with broad CIV absorption. We find that broad absorption line quasars may have broader emission lines on average than other quasars. Key words: Catalogs, Galaxies: Active, Galaxies: Quasars: Absorption Lines, Galaxies: Quasars: Emission Lines, Galaxies: Quasars: General
Retrieve 4784 NED objects in this reference.
Please click here for ADS abstract

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