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