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We present the weak lensing mass distribution of a triple merging clustercandidate at $z_{\rm photo}\sim 0.36$ belonging to a supercluster recentlydiscovered during the eROSITA Performance Verification phase. Our analysissolved a previous tension in the merger classification by confirming that thecluster pair eFEDS J093513.3+004746 and eFEDS J093510.7+004910 is undergoing amajor merger with a mass ratio $1.7_{-0.7}^{+0.5}$. According to our two-bodykinematic description, the encounter happened $0.58_{-0.20}^{+0.15}$ Gyr ago,in a scenario that supports the observed radio relic position at the clusteroutskirts. However, the same analysis showed that the companion cluster, eFEDSJ093501.1+005418, is not gravitationally bound to the interacting system andtherefore it is not part of the supercluster. We also checked the impact ofadopting a scaling relation to determine the halo concentration $c_{200}$. Atthe observed merger stage, where the clusters have travelled $\sim$55 per centof the path to reach the apoapsis, the choice of the $c_{200}$ (whether from ascaling relation or a free parameter in the mass model) does not changesignificantly either the cluster masses or the kinematic description.

A major galaxy cluster merger caught by eROSITA: weak lensing mass distribution and kinematic description