↩ 🔵 🔵 🔵 ❪✺₄❫ Spectral Fitting Sets ○ ❪✺_❫ Spectral Fitting Subs ○ ❪✺_ₛₛ❫ High-Energy Astrophysics Subsets ○ ❪✺_ₛₛ❫ Spectroscopic Subsets ○ ❪✺_ₜₛ❫ Spectral Fitting Typesets ○