January 14, 2013: Dr. Boris Gaensicke (Warwick University), who is the coordinating PI on the large observing campaign underway to observe cataclysmic variables with the HST Cosmic Origins Spectrograph (see AAVSO Alert Notice 471 and follow-up AAVSO Special Notices as listed on the AAVSO Observing Campaigns page), is requesting observations tonight and over the next few nights of the novalike variable BB Dor.
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."
October 5, 2010: As originally announced in AAVSO Alert Notice 423, Dr. Paula Szkody (U. Washington) has requested the help of AAVSO observers in monitoring the WZ Sge-type cataclysmic variable V455 And in support of Hubble Space Telescope ultraviolet spectroscopic observations.
August 30, 2010: Dr. Paula Szkody (U. Washington) has requested the help of AAVSO observers in monitoring the WZ Sge-type cataclysmic variable V455 And in support of Hubble Space Telescope ultraviolet spectroscopic observations scheduled for 6:55-15:20 2010 September 11 UT (the night of Friday, September 10/11) (JD 2455450.78819 - 2455451.13889). Observations are requested beginning immediately and continuing through September 20. This monitoring is crucial to these observations.