Models of gravitational lens candidates from Space Warps CFHTLS
  We report modelling follow-up of recently-discovered gravitational-lens
candidates in the Canada France Hawaii Telescope Legacy Survey. Lens modelling
was done by a small group of specially-interested volunteers from the
SpaceWarps citizen-science community who originally found the candidate lenses.
Models are categorised according to seven diagnostics indicating (a) the image
morphology and how clear or indistinct it is, (b) whether the mass map and
synthetic lensed image appear to be plausible, and (c) how the lens-model mass
compares with the stellar mass and the abundance-matched halo mass. The lensing
masses range from ~10^11 Msun to >10^13 Msun. Preliminary estimates of the
stellar masses show a smaller spread in stellar mass (except for two lenses): a
factor of a few below or above ~10^11 Msun. Therefore, we expect the
stellar-to-total mass fraction to decline sharply as lensing mass increases.
The most massive system with a convincing model is J1434+522 (SW05). The two
low-mass outliers are J0206-095 (SW19) and J2217+015 (SW42); if these two are
indeed lenses, they probe an interesting regime of very low star-formation
efficiency. Some improvements to the modelling software (SpaghettiLens), and
discussion of strategies regarding scaling to future surveys with more and
frequent discoveries, are included.
