↩ 🔵 🔵 🔵 ❪✺_❫ High-Energy Astrophysics Subs ○ ❪∂❫ High-Energy Astrophysics Math ○ ❪∂_❫ Astronomical Subs ○ ❪∂₌❫ High-Energy Astrophysics Formulations ○ Observed Counts (C₍I₎) ○◂ Predicted Counts (Cₚ₍I₎) ○◂