Notes. (1) Lens name. (2) Probability that galaxies in a 2′ × 2′ field around the lens galaxy are included in the z-COSMOS catalog. (3) The number of groups involved in the calculation of the external shear (within 5′  projected radius). (4–6) Convergence, shear strength, and shear direction of the groups and clusters around the lens. The first set of errors comes from the uncertainty on the group mass. The second set of errors comes from the uncertainty on the source redshift, which was chosen to be  ±0.5 for sources with unknown redshifts and the error on the source redshift estimation from Table 3, when it was measured. (7) The ID of the group or cluster with an impact parameter smaller than its radius (r₂₀₀) in Leauthaud et al. (2010). In parenthesis are its redshift, mass (in solar mass), concentration, and radius (in Mpc). The error on the cluster mass is 40% of the total mass (Vikhlinin et al. 2009). (8) Projected distance in kpc between the lens and the group/cluster center (at the lens redshift).