↩ 🔵 🔵 🔵 ❪✺_ₛₛ❫ High-Energy Astrophysics Subsets ○ ❪◑❫ X-Ray Binaries ○ Low-Mass X-Ray Binary (LMXB) ○꠹ ❪◑❫ HMXB ○ Hercules X-1 ❍ MAXI J1820+070 ❍ Swift J1753.5-0127 ❍