Active Galactic Nuclei in the Sloan Digital Sky Survey. I. Sample Selection
Active Galactic Nuclei in the Sloan Digital Sky Survey. I. Sample Selection
We have compiled a large sample of low-redshift active galactic nuclei (AGN) identified via their emission line characteristics from the spectroscopic data of the Sloan Digital Sky Survey. Since emission lines are often contaminated by stellar absorption lines, we developed an objective and efficient method of subtracting the stellar continuum …