SNe Ia Cosmology Analysis

This is the publicly available repository that contains the code for our SNe Ia cosmology analysis reported in the manuscript https://arxiv.org/abs/2508.20023 (submitted to ApJ).

The analysis code is in the notebook unblinded_analysis.ipynb

Input files are CSV for the calibrators (trgb_calibrators_cov.csv and trgb_calibrators_cov_with94D.csv) and the Hubble flow from ZTF SN Ia DR2 (Rigault et al. 2025, A&A, 694, A1), with ztf_data_hd.csv corresponding to the volume-limited sample (z_helio < 0.06) and a column added for the Hubble diagram redshift after flow correction (Carr et al. 2022, PASP, 39, e046) using the code at https://github.com/KSaid-1/pvhub.

Output plots and files are in the output/ directory. They start with H0- and then the name of the sample used. Our recommended samples are with94D and fiducial.

Full Changelog: https://github.com/mjbnewman/ETG-TRGB-SNIa/commits/v1.0.0