Plotted entries from OPSLOG files in VIRCAM report ZP_J_AVG, plot 2 (data set det_all):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS		det_ID     	values
====================================================
2014-12-23	57015.014371	DET1.CHIP1	23.80863953
2014-12-23	57015.014372	DET1.CHIP2	23.48963356
2014-12-23	57015.014373	DET1.CHIP3	23.57290268
2014-12-23	57015.014374	DET1.CHIP4	23.71906281
2014-12-23	57015.014375	DET1.CHIP5	23.78611755
2014-12-23	57015.014376	DET1.CHIP6	23.78242874
2014-12-23	57015.014377	DET1.CHIP7	23.78433609
2014-12-23	57015.014378	DET1.CHIP8	23.65550995
2014-12-23	57015.014379	DET1.CHIP9	23.70987701
2014-12-23	57015.014380	DET1.CHIP10	23.75798988
2014-12-23	57015.014381	DET1.CHIP11	23.73437309
2014-12-23	57015.014382	DET1.CHIP12	23.74800301
2014-12-23	57015.014383	DET1.CHIP13	23.51432991
2014-12-23	57015.014384	DET1.CHIP14	23.7319622
2014-12-23	57015.014385	DET1.CHIP15	23.76119232
2014-12-23	57015.014386	DET1.CHIP16	23.61619949