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The galaxy cluster Abell~3376 is a nearby (z=0.046) dissociative mergingcluster surrounded by two prominent radio relics and showing an X-raycomet-like morphology. The merger system is comprised of the subclusters A3376W& A3376E. Based on new deep multi-wavelength large-field images and publishedredshifts, we bring new insights about the history of this merger. Despite thedifficulty of applying the weak lensing technique at such low redshift, wesuccessfully recovered the mass distribution in the cluster field. Moreover,with the application of a two-body model, we have addressed the dynamics ofthese merging system. We have found the individual masses ofM_{200}^{W}=3.0_{-1.7}^{+1.3}x10^{14} M_{\odot} andM_{200}^{E}=0.9_{-0.8}^{+0.5}x10^{14} M_{\odot}. The cometary shaped X-raydistribution shows only one peak spatially coincident with both Eastern BCG andthe A3376E mass peak whereas the gas content of A3376W seems to be strippedout. Our data allowed us to confirm the existence of a third subcluster locatedat the North, 1147+-62 kpc apart from the neighbour subcluster A3376E andhaving a mass M_{200}^{N}=1.4_{-1.0}^{+0.7}x10^{14} M_{\odot}. From ourdynamical analysis, we found the merging is taking place very close to theplane of the sky, with the merger axis just 10 deg +-11 deg from it. Theapplication of a two-body analysis code showed that the merging cluster is seen0.9_{-0.3}^{+0.2} Gyr after the pericentric passage and it is currently goingto the point of maximum separation between the subclusters.

Weak lensing and spectroscopic analysis of the nearby dissociative merging galaxy cluster Abell 3376