Special Notice #118: Request extended to observe High-Mass X-Ray Binaries (HMXBs) in support of radial velocity observations
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HMXB campaign extended until further notice.
1H 1936+541
Special Notice #159: Request for observations of high-mass X-ray binaries
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AAVSO Special Notice #159
Request fo
Special Notice #163: Request for observations of high-mass X-ray binaries
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AAVSO Special Notice #163
Request fo