Mass-detection of a matter concentration projected near the cluster Abell 1942: Dark clump or high-redshift cluster?

T. Erben, L. van Waerbeke, Y. Mellier +4

A weak-lensing analysis of wide-field $V$- and $I$-band images centered on the cluster Abell 1942 has uncovered a mass concentration $\sim 7$ arcminutes South of the cluster center…