The Emission-Line Properties of Low-Redshift Quasi-stellar Objects

Spectra covering the region λλ4300-5700 have been obtained of all 87 QSOs in the BQS catalog having redshifts less than 0.5. An empirical technique which allows the measurement and subtraction of the many Fe II lines in this region has been developed and applied to these spectra. Measurements of the strengths of Hβ, [O III] λ5007, and He II λ4686, and a four-dimensional parameterization of the Hβ profile have been combined with optical, radio, and X-ray continuum information from the literature to try to understand how these properties are related