The Optical and Ultraviolet Emission-Line Properties of Bright Quasars
  with Detailed Spectral Energy Distributions
  We present measurements and statistical properties of the optical and
ultraviolet emission lines present in the spectra of 85 bright quasars which
have detailed spectral energy distributions. This heterogeneous sample has
redshifts up to z=1.5 and is comprised of three subsamples that may be of
particular utility: ultraviolet excess Palomar-Green quasars, quasars with
far-ultraviolet coverage from FUSE, and radio-loud quasars selected to have
similar extended radio luminosity originally selected for orientation studies.
Most of the objects have quasi-simultaneous optical-ultraviolet spectra, with
significant coverage in the radio-to-X-ray wavebands. The parameters of all
strong emission lines are measured by detailed spectral fitting. Many
significant correlations previously found among quasar emission-line properties
are also present in this sample, e.g., the Baldwin effect, the optical
correlations collectively known as eigenvector 1, and others. Finally, we use
our measurements plus scaling relationships to estimate black hole masses and
Eddington fractions. We show the mass estimates from different emission lines
are usually in agreement within a factor of 2, but nearly a third show larger
differences. We suggest using multiple mass scaling relationships to estimate
black hole masses when possible, and adopting a median of the estimates as the
black hole mass for individual objects. Line measurements and derived AGN
properties will be used for future studies examining the relationships among
quasar emission lines and their spectral energy distributions.
