Weak Lensing Discovery and Tomography of a Cluster at Z = 0.68

We report the discovery, spectrographic confirmation, and weak lensing tomography of a massive cluster of galaxies at z = 0.68. The first shear-selected cluster from the Deep Lens Survey, a deep optical imaging survey of 28 deg sup 2, it dominates the weak lensing mass map of its 40' field. At more than twice the redshift of the only previous shear-selected cluster, it demonstrates that the redshift range of shear-selected cluster samples will be competitive with that of X-ray selected samples.