Special Notice #159: Request for observations of high-mass X-ray binaries
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AAVSO Special Notice #159
Request fo
RX J2030.5+4751
Special Notice #163: Request for observations of high-mass X-ray binaries
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AAVSO Special Notice #163
Request fo
Alert Notice 377: Request extended to observe HMXBs in support of radial velocity observations
Note: HMXB campaign extended until further notice. - Elizabeth O. Waagen, 17 April 2020