Weak gravitational lensing is an ecient technique for detecting galaxy clusters and probing their mass distribution. We present a weak gravitational lensing analysis of a large sample of galaxy clusters. We have built a nearly complete sample of 50 optically rich clusters, located in the redshift range 0:1 < z < 0:6 and observed in the Canada France Hawaii Telescope Legacy Survey (CFHT-LS). We used weak gravitational lensing to measure, for each galaxy cluster, the density radial prole, the total mass and the mass-to-light ratio (by comparing with the total luminosity of the member galaxies). This project is a preliminary step towards the next analysis of the weak lensing galaxy clusters in the surveys KiDS and VOICE, which are currently collecting data with the VLT Survey Telescope, in Chile.

ABSTRACT
1. INTRODUCTION
2. WEAK GRAVITATIONAL LENSING
3. DATA ANALYSIS
4. FIRST RESULTS
5. CONCLUSIONS
REFERENCES

• A. Phriksee(Master Program in Physics, Department of Physics and Materials Science, Chiang Mai University)
• G. Covone(Department of Physics, University of Naples "Federico II")
• S. Komonjinda(Astronomical Research Laboratory, Department of Physics and Materials Science, Chiang Mai University)
• M. Sereno(Department of Physics and Astronomy, University of Bologna)