BayeSN times Dovekie: Joint Photometric Cross-calibration and SED Modelling of Type Ia Supernovae

arXiv:2606.19429 · astro-ph.CO, astro-ph.IM · Submitted 2026-06-17 · Read on arXiv

M. Grayling, B. Popovic, M. Ginolin, A. Do, K. S. Mandel

astro-ph.CO, astro-ph.IM

Submitted: 2026-06-17

Comments: 10 pages, 6 figures, 3 tables, submitted to MNRAS

Code: https://github.com/des-science/DES-SN5YR

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Calibration — 55× in this paper · explained in 7 episodes
• Consistency — 1× in this paper · explained in 3 episodes
• Degeneracy — 1× in this paper · explained in 3 episodes
• Ensemble Approach — 1× in this paper · explained in 3 episodes
• Hybrid Approach — 1× in this paper · explained in 4 episodes
• Robustness — 1× in this paper · explained in 5 episodes
• Simulation-Based Inference (SBI) — 1× in this paper · explained in 3 episodes
• Simulation-based Inference — 1× in this paper · explained in 2 episodes
• Velocity Dispersion — 1× in this paper · explained in 2 episodes

Sources

• The axis of systematic bias in SN~Ia cosmology and implications for DESI 2024 results
• Examining extinction distributions for type Ia supernovae in simulated 3D galaxies
• On the origin of the environmental dependence of SN Ia magnitudes: A BayeSN view of the ZTF SN Ia DR2
• Old Universe, Young SNe Ia: A Statistical Analysis of Type Ia Supernova Progenitor Age from 6,983 TITAN Host Galaxies, and Implications for Cosmology
• A Bayesian Perspective on Evidence for Evolving Dark Energy
• A Reassessment of the Pantheon+ and DES 5YR Calibration Uncertainties: Dovekie
• Lightcurve Modelling of 2,205 ZTF DR2 Type Ia Supernovae: Implications for SN Ia Physics and Cosmology

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