↩ 🔵 🔵 🔵 ❪𖣐❫ Spectral Fitting Tech ○ ❪𖣐₃❫ High-Energy Astrophysics Software ○️ ❪𖣐₃❫ Spectroscopy Software ○ ❪𖣐₃’❫ Spectral Fitting Packages ○️