Special Notice #129: Request extended to observe High-Mass X-Ray Binaries (HMXBs) in support of radial velocity observations */ /*-->*/ HMXB campaign extended until further notice. Tags AAVSO Special Notice V1008 Cep V2175 Cyg 4U 2206+543 HMXB AAVSO International Database Read more about Special Notice #129: Request extended to observe High-Mass X-Ray Binaries (HMXBs) in support of radial velocity observations
