Health Check monitor

This is the trending plot for the ISAAC DARK distribution width. QC parameters derived from DARK frames.

QC parameter are derived from post-pipeline Quality Control processes in Garching, hence there are no values from Paranal to be included.

Method:
1) Subtract two raw dark frames from each other (and scale with sqrt(2)), 2) generate a histogram using all pixel of the chip (1024x1024),
3) fit the histogram by a Gaussian and get width.
These plots describe:
1. setup = SW, DoubleCorr, DIT=10; RON12 values for UL, UR, LL, LR (black); Histogram width (red)
setup = LW, DoubleCorrHighBias, DIT=0.28; RON12 value (black); Histogram width (red)
3. setup = LW, DoubleCorrLowBias, DIT=2.0; RON12 value (black); Histogram width (red)
4. setup = LW, UncorrHighBias, DIT=0.11; RON12 and RON23 values (black); Histogram width (red)

5. setup = SW, NonDest, DIT=10; RON12 values for UL, UR, LL, LR (black); Histogram width (red)
6. setup = LW, DoubleCorrHighBias, DIT=0.56; RON12 value (black); Histogram width (red)
7. setup = LW, DoubleCorrLowBias, DIT=5; RON12 value (black); Histogram width (red)

For academic interest, the RON values derived from the pipeline are overplot (block dots).

Find more information about ISAAC DARK frames here.

Other QC parameters related to detector properties (like read noise, linearity) are trended.