== P3.26	Detector persistence == 
•	**Phase**		:	3  
•	**Status**		: 	Draft	 
•	**Category**		: 	Daytime calibration (C3)
•	**Recurrence**	: 	once every 1-3 months starting from commissioning.
•	**Duration**		: 	20 minutes
**Description**
•	Monitor persistence after saturation. 
**Prerequisites**
•	Instrument and dome closed. No lights inside dome.
**Procedure**
•	Record a background exposure, then one highly saturated exposure; then a long series of exposures with source off. 
•	CI B_H, point source.
**Success criteria**
•	Accuracy of photometry 10%  
**Notes**
•	Same as activity 9.3 in AD4
**LBTO support**
•	Support from LBTI/LBTO?
**Associated SHARK-NIR personnel**
•	JF, LM, MdP
**Date performed and by whom**