Plotted entries from OPSLOG files in VIRCAM report DARKMED_1_10011_AVG, plot 1 (data set det_avg):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS		det_ID     	values
====================================================
2013-05-19	56432.795069	AVG				0.8125
2013-05-20	56433.432459	AVG				0.106689
2013-05-21	56434.414055	AVG				-0.22168