James Annis 1 SDSS GriPhyN Meeting (Chicago August 2001) SDSS Virtual Data Cluster Catalogs Find clusters of galaxies Catalog level virtual data Testbed design Weak Lensing in the Southern Survey Weak lensing from image shape parameters Drives construction of coadded image data The coadd is data intensive Correlation Functions Auto and cross correlation of galaxies CPU intensive, monte carlo testing more so Will break up galaxy sample into many sub-samples High surface brightness/Low surface brightness Blue galaxies/red galaxies Saving and distribution of results at a premium