We report measurements of the Sunyaev-Zel'dovich (SZ) effect in three high-redshift (0.89 < z < 1.03), X-ray selected galaxy clusters. The observations were obtained at 30 GHz during the commissioning period of a new, eight-element interferometer -- the Sunyaev-Zel'dovich Array (SZA) -- built for dedicated SZ effect observations. The SZA observations are sensitive to angular scales larger than those subtended by the virial radii of the clusters. Assuming isothermality and hydrostatic equilibrium for the intracluster medium, and gas-mass fractions consistent with those for clusters at moderate redshift, we calculate electron temperatures, gas masses, and total cluster masses from the SZ data. The SZ-derived masses, integrated approximately to the virial radii, are 1.9 ^{+0.5}_{-0.4}x10^{14} solar masses for CLl1415.1+3612, 3.4^{+0.6}_{-0.5}x10^{14} solar masses for CL1429.0+4241, and 7.2^{+1.3}_{-0.9}x10^{14} solar masses for CL1226.9+3332. The SZ-derived quantities are in good agreement with the cluster properties derived from X-ray measurements.
@article{arxiv.astro-ph/0610115,
title = {Observations of High-Redshift X-Ray Selected Clusters with the Sunyaev-Zel'dovich Array},
author = {Stephen Muchovej and John E. Carlstrom and John Cartwright and Christopher Greer and David Hawkins and Ryan Hennessy and Marshall Joy and James W. Lamb and Erik M. Leitch and Michael Loh and Amber D. Miller and Tony Mroczkowski and Clem Pryke and Ben Reddall and Marcus Runyan and Matthew Sharp and David Wood},
journal= {arXiv preprint arXiv:astro-ph/0610115},
year = {2010}
}