Kavli Affiliate: Rafe Schindler | Summary:We report on SPT-CLJ2011-5228, a giant system of arcs created by a cluster at $z=1.06$. The arc system is notable for the presence of a bright central image. The source is a Lyman Break galaxy at $z_s=2.39$ and the mass enclosed within the 14 arc second radius Einstein ring is […]
Continue.. Core or cusps: The central dark matter profile of a redshift one strong lensing cluster with a bright central image