SIMBAD references

We present a weak lensing analysis of the cluster of galaxies RXC J2248.7-4431, a massive system at z = 0.3475 with prominent strong lensing features covered by the Cluster Lensing And Supernova survey with Hubble (CLASH). Based on UBVRIZ imaging from the Wide-Field Imager camera at the MPG/ESO 2.2-m telescope, we measure photometric redshifts and shapes of background galaxies. The cluster is detected as a mass peak at 5σ significance. Its density can be parametrized as a Navarro-Frenk-White (NFW) profile with two free parameters, the mass M_200m=33.1^+9.6_-6.8×10^14 M_☉ and concentration c_200m=2.6^+1.5_-1.0. We discover a second cluster inside the field of view at a photometric redshift of z ~ 0.6, with an NFW mass of M_200m=4.0^+3.7_-2.6×10^14 M_☉.