Data and code for: The ISW-to-lensing ratio of DESI photometric voids as a probe of gravitational potential decay

Data products, analysis pipeline, and figure scripts accompanying Ader (2026), "The ISW-to-lensing ratio of DESI photometric voids as a probe of gravitational potential decay," submitted to MNRAS. This deposit contains: The complete analysis pipeline (single Python script) that performs stacked ISW temperature and CMB lensing convergence measurements around photometric voids from the DESI Legacy Imaging Surveys, computes the ISW-to-lensing ratio R(z) in four tomographic redshift bins (0.0 < z ≤ 0.8), and runs robustness tests. All derived data products: per-slice stacked temperature and lensing profiles, compensated top-hat and core estimator measurements, Monte Carlo error distributions, jackknife diagnostics, ΛCDM fit parameters, robustness test results, and core aperture justification metrics. Figure scripts and PDFs for all figures in the paper. Input data (Planck 2018 CMB maps and DESI Legacy Survey void catalogues from Hang et al. 2021, MNRAS 507, 510) are not redistributed but are publicly available; see data_sources.txt for download URLs. See README.md for the full repository structure and reproduction instructions.