The Massive and Distant Clusters of WISE Survey II: Initial
  Spectroscopic Confirmation of z ~ 1 Galaxy Clusters Selected from 10,000
  Square Degrees
  We present optical and infrared imaging and optical spectroscopy of galaxy
clusters which were identified as part of an all-sky search for high-redshift
galaxy clusters, the Massive and Distant Clusters of WISE Survey (MaDCoWS). The
initial phase of MaDCoWS combined infrared data from the all-sky data release
of the Wide-field Infrared Survey Explorer (WISE) with optical data from the
Sloan Digital Sky Survey (SDSS) to select probable z ~ 1 clusters of galaxies
over an area of 10,000 deg^2. Our spectroscopy confirms 19 new clusters at 0.7
< z < 1.3, half of which are at z > 1, demonstrating the viability of using
WISE to identify high-redshift galaxy clusters. The next phase of MaDCoWS will
use the greater depth of the AllWISE data release to identify even higher
redshift cluster candidates.
