Cosmology with supernova Encore in the strong lensing cluster MACS J0138$-$2155: photometry, cluster members, and lens mass model

S. Ertl, S. H. Suyu, S. Schuldt +23

The strongly lensed Supernova (SN) Encore at a redshift of $z=1.949$, discovered behind the galaxy cluster MACS J0138$-$2155 at $z=0.336$, provides a rare opportunity for time-de…