Plotted entries from OPSLOG files in VIRCAM report TWILRAWAVG_Z_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	57015.000176	DET1.CHIP1	4373
2014-12-23	57015.000177	DET1.CHIP2	2725
2014-12-23	57015.000178	DET1.CHIP3	3062
2014-12-23	57015.000179	DET1.CHIP4	3591
2014-12-23	57015.000180	DET1.CHIP5	3789
2014-12-23	57015.000181	DET1.CHIP6	4304
2014-12-23	57015.000182	DET1.CHIP7	4336
2014-12-23	57015.000183	DET1.CHIP8	3575
2014-12-23	57015.000184	DET1.CHIP9	3644
2014-12-23	57015.000185	DET1.CHIP10	3797
2014-12-23	57015.000186	DET1.CHIP11	3549
2014-12-23	57015.000187	DET1.CHIP12	3837
2014-12-23	57015.000188	DET1.CHIP13	2720
2014-12-23	57015.000189	DET1.CHIP14	3700
2014-12-23	57015.000190	DET1.CHIP15	4249
2014-12-23	57015.000191	DET1.CHIP16	3409