XSNAP: An X-ray Supernova Analysis Pipeline with Application to the Type II Supernova 2024ggi

X-ray observations of Type II supernovae (SNe II) probe the physics of supernova (SN) shocks and the mass-loss histories of their progenitor stars. We present multi-epoch, X-ray observations of SN II 2024ggi ($D\approx 7.2\mathrm{M}\mathrm{p}\mathrm{c}$) from $Swift$-XRT, $Chandra$ and $XMM$, which cover $\sim 1-344$ days since first light. We analyze these observations using a new open-source Python package called $\mathtt{\text{XSNAP}}$, which standardizes a unified command-line interface for instrument-specific reduction and spectral extraction. $\mathtt{\text{XSNAP}}$ introduces application programming interfaces for per-epoch spectral modeling through $\mathtt{\text{PyXspec}}$ and $\mathtt{\text{emcee}}$ Markov chain Monte Carlo fitting. We employ $\mathtt{X}\mathtt{S}\mathtt{N}\mathtt{A}\mathtt{P}$ to model the multi-epoch X-ray spectra of SN 2024ggi with an absorbed thermal bremsstrahlung model and calculate a steady progenitor mass-loss rate of $(6.2\pm 0.2)\times {10}^{-5}{M}_{\odot }\mathrm{y}{\mathrm{r}}^{-1}$ $(v_{\mathrm{w}\mathrm{i}\mathrm{n}\mathrm{d}}=20\mathrm{k}\mathrm{m}{\mathrm{s}}^{-1})$, for which the detected X-ray emission traces the final 117 years before explosion. The software is publicly available on GitHub, with a released package on the Python Package Index (PyPI).