Additional Data for "Shock cooling of a red-supergiant supernova at redshift 3 in lensed images"

The dataset includes additional data for the journal paper “Shock cooling of a red-supergiant supernova at redshift 3 in lensed images” by W. Chen et al., 2022. As described in the paper, these data include the MMT spectroscopic data, the HST coaddition and image differencing data, the GALFIT scripts and resulting models, the HST photometry of the SN host galaxy, the lens model, the SN light curve fitting script and resulting MCMC data, and plots of distributions of the model parameters and the best-fit light curves.