AAVSO Special Notice #186
Request for observations of high-mass X-ray binaries
January 4, 2010
Dr. Gordon Sarty, University of Saskatchewan, Canada, requests our continuing assistance in his ongoing radial velocity observations of High Mass X-ray Binaries (HMXBs). See AAVSO Special Notice 175 for prior requests and project information. The targets for the current observing run are the same as those listed in Special Notice 175. Dr. Sarty provides the following text for the current request: "Please obtain BVRI photometry (or any subset thereof, VI preferred) of the following six HMXBs for the time period of our radial velocity observations from January 4 to January 31. The actual scheduled observing times are January 4-7 and January 22-31 if you want to get observations that are simultaneous with ours. Simultaneous observations are very useful. All observations of the HMXBs at any time are valuable. The targets for this observing campaign are: Desig. Name R.A.(2000) Dec.(2000) Mag LPH no. AUID 2157+49 V2175 Cyg 22:01:38.2 +50:10:04.6 8.8 127 000-BFS-469 2204+54 2206+543 22:07:56.2 +54:31:06.4 9.9 128 000-BDC-531 [V1008 Cep] 0140+60B V831 Cas 01:47:00.2 +61:21:23.7 11.3 029 000-BCY-758 0434+41 RXJ0440.9+ 04:40:59.3 +44:31:49.3 10.8 034 000-BCZ-082 [LS V +44 17] 0515+37 V420 Aur 05:22:35.2 +37:40:33.6 7.5 040 000-BCT-897 0630+05B SAXJ0635+0 06:35:18.3 +05:33:06.3 12.8 058 000-BCZ-435 [SAX J0635+0533] Our radial velocity measurements will be done with the Dominion Astrophysical Observatory (DAO) 1.85-m Plaskett telescope, in Victoria, B.C., Canada. We will alternate observations of a different subset of the six stars throughout each night. The observer will be Dave Balam, who can be reached by e-mail to cosmos@uvic.ca. Interested AAVSO observers should concentrate on one star per night, all night, for as many nights as you can devote, while we are observing. For more background information on the HMXB project, please see our JAAVSO preprint at http://www.aavso.org/publications/ejaavso/v35n2/327.shtml Charts with project specific information may be downloaded at: http://homepage.usask.ca/~ges125/Astronomy/LPH127_aavso.pdf http://homepage.usask.ca/~ges125/Astronomy/LPH128_aavso.pdf http://homepage.usask.ca/~ges125/Astronomy/LPH029_aavso.pdf http://homepage.usask.ca/~ges125/Astronomy/LPH034_aavso.pdf http://homepage.usask.ca/~ges125/Astronomy/LPH040_aavso.pdf http://homepage.usask.ca/~ges125/Astronomy/LPH058_aavso.pdf Please submit your observations directly to the AAVSO International Database. Thanks for your ongoing coverage of the HMXBs. Please direct any questions about this observing campaign to Dr. Gordon Sarty at gordon.sarty@usask.ca ." --------------------------------------------------- SUBMIT OBSERVATIONS TO THE AAVSO Information on submitting observations to the AAVSO may be found at: http://www.aavso.org/observing/submit/ SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION A Special Notice archive is available at the following URL: http://www.aavso.org/publications/specialnotice/ Subscribing and Unsubscribing may be done at the following URL: http://www.aavso.org/publications/email/