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We present a gravitational lensing analysis of the cluster of galaxies MS1008-1224 (z=0.30), based on very deep observations obtained using the VLT withFORS and ISAAC during the science verification phase. We reconstructed theprojected mass distribution from B,V,R,I bands using two different methodsindependently. The mass maps are remarkably similar, which confirm that the PSFcorrection worked well. The ISAAC and FORS data were combined to measure thephotometric redshifts and constrain the redshift distribution of the lensedsources. The total mass inferred from weak shear is 2.3 10^{14} h^{-1} Mo onlarge scales, in agreement with the X-ray mass. The measured mass profile iswell fit by both Navarro, Frenk and White and isothermal sphere with coreradius models although the NFW is slightly better. In the inner regions, thelensing mass is about 2 times higher than the X-ray mass, which supports theview that complex physical processes in the innermost parts of clusters areresponsible for the X-ray/lensing mass discrepancy. The central part of thecluster is composed of two mass peaks whose the center of mass is 15 arcsecondnorth of the cD galaxy. This provides an explanation for the 15 arcsecondoffset between the cD and the center of the X-ray map reported elsewhere. Theoptical, X-ray and the mass distributions show that MS 1008-1224 is composed ofmany subsystems which are probably undergoing a merger. MS 1008-1224 shows aremarkable case of cluster-cluster lensing. The photometric redshifts show anexcess of galaxies located 30 arcseconds south-west of the cD galaxy at aredshift of about 0.9 which is lensed by MS 1008-1224. These results show theimportance of getting BVRIJK images silmultenously. The VLT is a unique tool toprovide such datasets.Comment: 22 pages, submitted to A&A, paper with `big' figures available at  ftp://ftp.cita.utoronto.ca/pub/waerbeke/ms1008paper

Weak lensing analysis of MS 1008–1224 with the VLT