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We report the detection of the Sunyaev-Zel'dovich (SZ) effect of galaxycluster XLSSU J021744.1-034536, using 30 GHz CARMA data. This cluster wasdiscovered via its extended X-ray emission in the XMM-Newton Large ScaleStructure survey, the precursor to the XXL survey. It has a photometricallydetermined redshift $z=1.91^{+0.19}_{-0.21}$, making it among the most distantclusters known, and nominally the most distant for which the SZ effect has beenmeasured. The spherically integrated Comptonization is$Y_{500}=(3.0\pm0.4)\times 10^{-12}$, a measurement which is relativelyinsensitive to assumptions regarding the size and redshift of the cluster, aswell as the background cosmology. Using a variety of locally calibrated clusterscaling relations extrapolated to z~2, we estimate a mass $M_{500} \sim(1$-$2)\times 10^{14}M_{sun}$ from the X-ray flux and SZ signal. The measuredproperties of this cluster are in good agreement with the extrapolation of anX-ray luminosity-SZ effect scaling relation calibrated from clusters discoveredby the South Pole Telescope at higher masses and lower redshifts. The fullXXL-CARMA sample will provide a more complete, multi-wavelength census ofdistant clusters in order to robustly extend the calibration of cluster scalingrelations to these high redshifts.

The XXL Survey V: Detection of the Sunyaev-Zel'dovich effect of the Redshift 1.9 Galaxy Cluster XLSSU J021744.1-034536 with CARMA