Weak lensing analysis of RXC J2248.7-4431
Zenteno, A.; Gruen, D.; Young, J.; Seitz, S.; Eichner, T.; Vikram, V.; Brimioulle, F.; Koppenhoefer, J.; Lee, C. -H.; Riffeser, A.; Weidinger, T.
Germany, United States
Abstract
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_{⊙}}.