Speaker
Description
The Abell 370 galaxy cluster is famous for housing the first identified strongly lensed galaxy. The cluster was recently observed by several JWST programs, revealing two supernovae (SNe) that we followed-up with additional JWST imaging and spectroscopy. The first is SN Typhon, a quadruply-imaged, core-collapse SN at z=1.9 with a remarkable rest-frame UV light curve of each of its images from the Hubble Space Telescope. I will show the dataset we now have, including a nebular-phase JWST spectrum, and discuss the implications of the SN for cosmology and SN physics. The second SN is a superluminous SN (SLSN) at z=4.13, the most distant SLSN yet discovered. I will show the early light curve of the SN we have obtained as well as its spectrum, and discuss future plans for additional observations.