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We present our measurement of the "bulk flow" using the kineticSunyaev-Zel'dovich (kSZ) effect in the WMAP 7-year data. As the tracer ofpeculiar velocities, we use Planck Early Sunyaev-Zel'dovich Detected ClusterCatalog and a compilation of X-ray detected galaxy cluster catalogs based onROSAT All-Sky Survey. We build a full-sky kSZ template and fit it to the WMAPdata in W-band. Using a Wiener filter we maximize the signal to noise ratio ofthe kSZ cluster signal in the data. We find no significant detection of thebulk flow, and our results are consistent with the LCDM prediction.

One Thousand and One Clusters: Measuring the Bulk Flow with the Planck ESZ and X-Ray Selected Galaxy Cluster Catalogs