AAVSO Alert Notice 618 announces an observing campaign on the faint polar variable SDSS J153817.35+512338.0 in support of HST observations. Please see the notice for details and observing instructions.
Many thanks, and Good observing,
Elizabeth Waagen, AAVSO HQ
AAVSO Alert Notice 628 announces the date/time of HST observations of the polar SDSS J153817.35+512338.0 (campaign announced in AAVSO Alert Notice 618). Please see Alert Notice 628 for details and observing instructions.
Many thanks, and Good observing,
Elizabeth Waagen, AAVSO HQ