In 2014 an observing campaign was launched to carry out long term monitoring of the symbiotic variable RT Cru in support of research being carried out by Dr. Margarita Karovska. This campaign is still active. Please see AAVSO Alert Notice 503 for details and observing instructions. This forum thread is being created now to allow for discussion, etc. (the campaign predated the existence of our forums).
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ