Description
Strong gravitationally lensed supernovae are exquisite laboratories for studying supernova astrophysics, dark matter in high-z galaxies and measuring the Hubble Constant. Their use in cosmology is predicated on measuring time-delays between multiple images and inferring the lens potential. The Vera C. Rubin Observatory is expected to discover tens of such systems, meaning that the constraints on the Hubble Constant will be systematics limited. One of the biggest open questions is how complex can a mass model be to explain the deflector galaxy and not bias the inferred H0. In this talk, I will review the current predictions for LSST and summarise recent work on using complex models with higher order multipoles to explain the lens mass distribution.
