AAVSO Alert Notice 767 announces an observing campaign beginning immediately on the "propeller" cataclysmic variable CSS_J024048.5+195227 in support of HST observations. Please see the notice for details and observing instructions.
There are threads for this campaign under the following forums:
Please subscribe to these threads if you are participating in the campaign so you can be updated. Join in the discussion or ask questions there!
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ