arxiv: 1304.0764 · v2 · pith:KLJJK3EMnew · submitted 2013-04-02 · 🌌 astro-ph.CO

Weak lensing analysis of RXC J2248.7-4431

D. Gruen , F. Brimioulle , S. Seitz , C.-H. Lee , J. Young , J. Koppenhoefer , T. Eichner , A. Riffeser

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V. Vikram T. Weidinger A. Zenteno

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keywords clusterlensingmassanalysisgalaxiesj2248msolphotometric

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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 HST/CLASH survey (Postman et al. 2012). Based on UBVRIZ imaging from the WFI camera at the MPG/ESO-2.2m telescope, we measure photometric redshifts and shapes of background galaxies. The cluster is detected as a mass peak at 5sigma significance. Its density can be parametrised as an NFW profile (Navarro et al. 1996) with two free parameters, the mass M_200m=(33.1+9.6-6.8)x10^14Msol 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)x10^14Msol.

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Weak lensing analysis of RXC J2248.7-4431

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