Special Notice #159: Request for observations of high-mass X-ray binaries
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AAVSO Special Notice #159
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2206+543
Special Notice #163: Request for observations of high-mass X-ray binaries
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AAVSO Special Notice #163
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Special Notice #175: Request for observations of high-mass X-ray binaries
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AAVSO Special Notice #175
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Special Notice #186: Request for observations of high-mass X-ray binaries
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AAVSO Special Notice #186
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Special Notice #210: Request for observations of high-mass X-ray binaries
May 19, 2010: Dr. Gordon Sarty, University of Saskatchewan, Canada, requests our continuing assistance in his ongoing observations of High Mass X-ray Binaries (HMXBs). Dr. Sarty provides the following text for the current request:
"Please obtain BVRI photometry (or any subset thereof, VI preferred) of the following four HMXBs for the time period of our radial velocity observations to be made with the 72-inch Plaskett telescope at the Dominion Astrophysical Observatory (DAO) from now until June 30.
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