↩ 🔵 🔵 🔵 ❪∂❫ Spectral Fitting Math ○ ❪𝛿❫ High-Energy Astrophysics Quantities ○ ❪𝛿❫ Spectroscopic Quantities ○ ❪𝛿’❫ Spectral Fitting Parameters ○ ❪𝛿’❫ Spectral Fitting Statistics ○️