We report on the weak lensing detection of a filament between two galaxy clusters at z = 0.55 , CL0015.9+1609 and RX J0018.3+1618 .
We conduct weak lensing analysis of deep multi-band Subaru/Suprime-Cam images with Lensfit .
The weak lensing signals from the filament are contaminated by signals from the adjacent massive clusters and we statistically subtract the cluster component using two different methods .
Both methods yield consistent shear profiles on the filament with \ga 2 \sigma significance and the average surface mass density of the filament is \langle \Sigma \rangle = ( 3.20 \pm 0.10 ) \times 10 ^ { 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 , which will serve as a new probe of structure formation in the Universe .