The SLUGGS Survey: a catalog of over 4000 globular cluster radial
  velocities in 27 nearby early-type galaxies
  Here we present positions and radial velocities for over 4000 globular
clusters (GCs) in 27 nearby early-type galaxies from the SLUGGS survey. The
SLUGGS survey is designed to be representative of elliptical and lenticular
galaxies in the stellar mass range 10 $<$ log M$_{\ast}$/M$_{\odot}$ $<$ 11.7.
The data have been obtained over many years, mostly using the very stable
multi-object spectrograph DEIMOS on the Keck II 10m telescope. Radial
velocities are measured using the calcium triplet lines with a velocity
accuracy of $\pm$ 10-15 km/s. We use phase space diagrams (i.e.
velocity--position diagrams) to identify contaminants such as foreground stars
and background galaxies, and to show that the contribution of GCs from
neighboring galaxies is generally insignificant. Likely ultra-compact dwarfs
are tabulated separately. We find that the mean velocity of the GC system is
close to that of the host galaxy systemic velocity, indicating that the GC
system is in overall dynamical equilibrium within the galaxy potential. We also
find that the GC system velocity dispersion scales with host galaxy stellar
mass in a similar manner to the Faber-Jackson relation for the stellar velocity
dispersion. Publication of these GC radial velocity catalogs should enable
further studies in many areas, such as GC system substructure, kinematics, and
host galaxy mass measurements.
