An improved standardization framework for Type II-P supernovae using a hierarchical Bayesian approach - Figures and data

Figures and data from Appendix B and C in "An improved standardization framework for Type II-P supernovaeusing a hierarchical Bayesian approach" (Holas et al. 2026, A&A). From Appendix B, the spectra and interpolated data (velocities, a/e, and magnitudes) are included, as well as all figures. Interpolated data was generated using Sccala (https://github.com/AlexHls/Sccala) From Appendix C, only figures are included.