Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-03-03
Astrophys.J.Suppl.165:1-18,2006
Astronomy and Astrophysics
Astrophysics
47 pages, 14 figures, accepted for publication in ApJS. The electronic version of Table 4 is provided by email request
Scientific paper
10.1086/503834
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 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 16883 quasars at 1.7
Anderson Scott F.
Brinkman John
Fan Xiaohui
Hall Patrick B.
Kleinman Scot James
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