SN Encore
- Type
- Supernova, Ia
- Status
- Confirmed
- Lensing
- Multiply imaged
- Lensing cluster
- MACS J0138.0-2155 (z = 0.338)
- Redshift
- 1.95
- Position
- 01:38:03.90 -21:55:49.0
- Discovered
- 2023
Second multiply-imaged supernova in MRG-M0138 (z = 1.95), after SN Requiem, found in JWST imaging in November 2023 (Pierel et al. 2024b). The "Cosmology with supernova Encore" series covers the MUSE spectroscopy (Granata et al. 2025), the GLEE lens models (Ertl et al. 2025), the time delays (Pierel et al. 2026) and the blind comparison of lens models with the resulting H0 (Suyu et al. 2026).
Papers
- Pierel et al. (2024b)
Lensed Type Ia Supernova "Encore" at z = 2: The First Instance of Two Multiply Imaged Supernovae in the Same Host Galaxy - Dhawan et al. (2024)
Spectroscopic analysis of the strongly lensed SN Encore: constraints on cosmic evolution of Type Ia supernovae - Granata et al. (2025)
Cosmology with supernova Encore in the strong lensing cluster MACS J0138-2155 Spectroscopy with MUSE - Acebron et al. (2025)
Enhanced strong-lensing model of MACS J0138.0-2155 based on new JWST and VLT/MUSE observations - Ertl et al. (2025)
Cosmology with supernova Encore in the strong lensing cluster MACS J0138-2155: Photometry, cluster members, and lens mass model - Pierel et al. (2026)
Cosmology with Supernova Encore in the Strong Lensing Cluster MACS J0138-2155: Time Delays and Hubble Constant Measurement - Suyu et al. (2026)
Cosmology with supernova Encore in the strong lensing cluster MACS J0138-2155: Lens model comparison and H0 measurement - Bazzanini et al. (2026)
A new H0 measurement with SNe Requiem and Encore using Gravity.jl