We present a variety of weak lensing results based on the ongoing analysis of R _ { C } -band imaging data from the Red-Sequence Cluster Survey ( RCS ) .
We briefly discuss the weak lensing signal induced by intervening large scale structure ( cosmic shear ) , and study the properties of the dark matter halos surrounding galaxies with 19.5 < R _ { C } < 21 ( which have a median redshift of z = 0.35 ) using a parametrized mass model for the galaxy mass distribution .
This allows us for the first time to constrain the extent of the halos .
We find a robust upper limit for the truncation parameter s < 470 h ^ { -1 } kpc ( 99.7 % confidence ) .
We also study the biasing properties of these galaxies as a function of scale .
We find that both the bias parameter b and the galaxy-mass cross-correlation coefficient r vary with scale ( on scales 0.1 - 6 ~ { } h ^ { -1 } Mpc ) .
Interestingly , we find that r = 0.57 ^ { +0.08 } _ { -0.07 } on scales \sim 0.5 h ^ { -1 } Mpc .