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We report on the weak lensing detection of a filament between two galaxyclusters at $z=0.55$, CL0015.9+1609 and RX J0018.3+1618. We conduct weaklensing analysis of deep multi-band Subaru/Suprime-Cam images with $Lensfit$.The weak lensing signals from the filament are contaminated by signals from theadjacent massive clusters and we statistically subtract the cluster componentusing two different methods. Both methods yield consistent shear profiles onthe filament with $\gtrsim2\sigma$ significance and the average surface massdensity of the filament is $<\Sigma>=(3.20\pm0.10)\times10^{14}h$M$_\odot$Mpc$^{-2}$, which is in broad agreement with previous studies.On-going surveys such as Hyper Suprime-Cam will identify more filaments, whichwill serve as a new probe of structure formation in the Universe.

Detection of a filament connected to CL0016 with weak gravitational lensing