2007A&A...471...31K

We present a detailed analysis of the medium redshift (z=0.2906) galaxy cluster Z3146 which is part of the ongoing ARCRAIDER project, a systematic search for gravitational arcs in massive clusters of galaxies. The analysis of Z3146 is based on deep optical wide field observations in the B, V and R bands obtained with the WFISO2.2m, and shallow archival WFPC2ST taken with the F606W filter, which are used for strong as well as weak lensing analyses. Additionally we have used publicly available XMM/Newton observations for a detailed X-ray analysis of Z3146. Both methods, lensing and X-ray, were used to determine the dynamical state and to estimate the total mass. We also identified four gravitational arc candidates. We find this cluster to be in a relaxed state, which is confirmed by a large cooling flow with nominal ∼1600M_☉ per year, regular galaxy density and light distributions and a regular shape of the weak lensing mass reconstruction. The mass content derived with the different methods agrees well within 25% at r₂₀₀=1661h₇₀^–1kpc indicating a velocity dispersion of σ_v=869⁺¹²⁴_–153km/s.