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cataclysmic variable

Special Notice #299: Observations needed TODAY of SDSS J164248.52+134751.4

October 10, 2012: Dr. Boris Gaensicke (leader of the consortium observing CVs with the HST COS instrument; see AAVSO Alert Notice 471 and AAVSO Special Notice #297 for details and instructions) writes with an urgent message:
 
"STScI would like an update on SDSS J164248.52+134751.4 by ~16UT TODAY (2012 October 10), when the star is not easily visible for most of our observers. Any observations from Europe early this evening will be most welcome."

Alert Notice 468: Observing campaign on V380 Oph cancelled

August 21, 2012: The observing campaign on V380 Oph announced in AAVSO Alert Notice 466 (www.aavso.org/aavso-alert-notice-466) has been cancelled at the request of the principal investigators, Drs. Joseph Patterson and Arne Henden.

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