Keck Observations of 160 Gamma-Ray Burst Host Galaxies
  We present a preliminary data release from our multi-year campaign at Keck
Observatory to study the host galaxies of a large sample of Swift-era gamma-ray
bursts via multi-color ground-based optical imaging and spectroscopy. With over
160 targets observed to date (and almost 100 host detections, most of which
have not previously been reported in the literature) our effort represents the
broadest GRB host survey to date. While targeting was heterogeneous, our
observations span the known diversity of GRBs including short bursts, long
bursts, spectrally soft GRBs (XRFs), ultra-energetic GRBs, X-ray faint GRBs,
dark GRBs, SN-GRBs, and other sub-classes. We also present a preview of our
database (currently available online via a convenient web interface) including
a catalog of multi-color photometry, redshifts and line ID's. Final photometry
and reduced imaging and spectra will be available in the near future.
