A new observing campaign on the Z Cam-type cataclysmic variable AH Her is announced in AAVSO Alert Notice 483 . V photometry, visual observations, and spectroscopy are requested. The PI is Dr. Juan Echevarria of the Universidad Nacional Autónoma de México. AH Her has not been behaving normally for a long time and AAVSO observations are CRUCIAL to the success of this ground-based photometry/spectroscopy campaign.
Many thanks and good observing - Elizabeth Waagen, AAVSO HQ