Galaxy scale lenses in the RCS2: I. First Catalog of Candidate Strong
  Lenses
  We present the first galaxy scale lens catalog from the second Red-Sequence
Cluster Survey. The catalog contains 60 lensing system candidates comprised of
Luminous Red Galaxy (LRG) lenses at 0.2 < z < 0.5 surrounded by blue arcs or
apparent multiple images of background sources. The catalog is a valuable
complement to previous galaxy-galaxy lens catalogs as it samples an
intermediate lens redshift range and is composed of bright sources and lenses
that allow easy follow-up for detailed analysis. Mass and mass-to-light ratio
estimates reveal that the lens galaxies are massive (<M>~5.5x10e11 M_sun/h) and
rich in dark matter (<M/L>~14 M_sun/L_sun,B*h). Even though a slight increasing
trend in the mass-to-light ratio is observed from z=0.2 to z=0.5, current
redshift and light profile measurements do not allow stringent constraints on
the mass-to-light ratio evolution of LRGs.
