ISAAC trending system: HISTORY plot
Last update: 2007-12-13T11:28:19 (UT)
same group: OddEven Statistics
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*Date on this monitor changes at 21:00 UT
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Plot
[info]		 Symbol
[info]		 Source* Average [info] Thresholds [info] N_data Data downloads Remarks
method value unit method value
1 [19]QC1DB none   ADU none   27 this | last_yr | all Ks-band FPN from MASTER_IMG_FLAT divided by reference FLAT
1 ♦QC1DB none   ADU none   12 this | last_yr | all H-band FPN from MASTER_IMG_FLAT divided by reference FLAT
1 oQC1DB none   ADU none   18 this | last_yr | all J-band FPN from MASTER_IMG_FLAT divided by reference FLAT
1 •QC1DB none   ADU none   17 this | last_yr | all Js-band FPN from MASTER_IMG_FLAT divided by reference FLAT
2 [19]QC1DB none   ADU none   27 this | last_yr | all Ks-band FPN from MASTER_IMG_FLAT divided by reference FLAT
2 ♦QC1DB none   ADU none   12 this | last_yr | all H-band FPN from MASTER_IMG_FLAT divided by reference FLAT
2 oQC1DB none   ADU none   18 this | last_yr | all J-band FPN from MASTER_IMG_FLAT divided by reference FLAT
2 •QC1DB none   ADU none   17 this | last_yr | all Js-band FPN from MASTER_IMG_FLAT divided by reference FLAT
3 [19]QC1DB none   ADU none   27 this | last_yr | all Ks-band FPN from MASTER_IMG_FLAT divided by reference FLAT
3 ♦QC1DB none   ADU none   12 this | last_yr | all H-band FPN from MASTER_IMG_FLAT divided by reference FLAT
3 oQC1DB none   ADU none   18 this | last_yr | all J-band FPN from MASTER_IMG_FLAT divided by reference FLAT
3 •QC1DB none   ADU none   17 this | last_yr | all Js-band FPN from MASTER_IMG_FLAT divided by reference FLAT
4 [19]QC1DB none   ADU none   27 this | last_yr | all Ks-band FPN from MASTER_IMG_FLAT divided by reference FLAT
4 ♦QC1DB none   ADU none   12 this | last_yr | all H-band FPN from MASTER_IMG_FLAT divided by reference FLAT
4 oQC1DB none   ADU none   18 this | last_yr | all J-band FPN from MASTER_IMG_FLAT divided by reference FLAT
4 •QC1DB none   ADU none   17 this | last_yr | all Js-band FPN from MASTER_IMG_FLAT divided by reference FLAT
*Data sources: QC1DB: QC1 database; LOCAL: local text file
This plot

This is the trending plot for the ISAAC twilight flat QC parameters of the SW-arm

These plots describe:
The master flat has been divided by a reference master flat to get rid of the high structural noise (fixed pattern noise). On this differential frame, a histogram is generated and is fit by a Gaussian to retrieve a robust pixel statistics and the width is retrieved. This width is a robust estimate of variationsin the structural noise. Renewal of the reference flats are indicated.

QC parameters have not been calculated by the pipeline but by post-pipeline QC scripts, hence there are no values from Paranal to be included.

Fig.1. upper left quadrant of the detector.
Fig.2. upper right quadrant of the detector.
Fig.3. lower left quadrant of the detector.
Fig.4. lower right quadrant of the detector.

The color coding is : green for H, blue for J and Js, red for K.

This QC1 parameter is sensitive to changes in the structural noise, which can be due to changes in the fringe pattern, instrumental internal reflections and the structural noise of the detector itself.

Find more information about ISAAC QC parameters derived from twilight flats here.

 

General information

Click on any of the plots to see a close-up version. The latest date is indicated on top of the plot, data points belonging to that date are specially marked.

If configured,

  • statistical averages are indicated by a solid line, and thresholds by broken lines
  • outliers are marked by a red asterisk. They are defined as data points outside the threshold lines
  • "aliens" (= data points outside the plot Y limits) are marked by a red arrow (↑ or ↓)
  • you can download the data for each parameter set if the 'Data downloads' link shows up