Key points are not available for this paper at this time.
Supernova (SN) H0pe is a gravitationally lensed, triply-imaged, Type Ia SN (SN Ia) discovered in James Webb Space Telescope imaging of the PLCK G165. 7+67. 0 cluster of galaxies. Well-observed multiply-imaged SNe provide a rare opportunity to constrain the Hubble constant (H₀), by measuring the relative time delay between the images and modeling the foreground mass distribution. SN H0pe is located at z=1. 783, and is the first SN Ia with sufficient light curve sampling and long enough time delays for an H₀ inference. Here we present photometric time-delay measurements and SN properties of SN H0pe. Using JWST/NIRCam photometry we measure time delays of t₀₁=-116. 6^+10. 8-₉. ₃ and t₂₁=-48. 6^+3. 6-₄. ₀ observer-frame days relative to the last image to arrive (image 2b; all uncertainties are 1), which corresponds to a 5. 6\% uncertainty contribution for H₀ assuming 70 km s^-1 Mpc^{-1}. We also constrain the absolute magnification of each image to ₀=4. 3^+1. 6-₁. ₈, ₁=7. 6^+3. 6-₂. ₆, ₂=6. 4^+1. 6-₁. ₅ by comparing the observed peak near-IR magnitude of SN H0pe to the non-lensed population of SNe Ia.
Pierel et al. (Wed,) studied this question.