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UVES:
parasitic light
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UVES trending system: HEALTH CHECK report
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Last update: 2022-05-22T06:21:54 (UT)
  | now: 2022-05-22T20:21:45 (UT) muc02 QC pipeline: uves-6.1.7 (installed 2022-03-21)
same group: Std_Modes
General news:
UVES news:  
Report news:
DATE*: [?] 2022-05-15
report | NLT
2022-05-16
report | NLT
2022-05-17
report | NLT
2022-05-18
report | NLT
2022-05-19
report | NLT
2022-05-20
report | NLT
2022-05-21
report | NLT
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*Date on this monitor changes at 21:00 UT
png: Information and research:
- png file - advanced studies: QC1 browser | QC1 plotter
Plot
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Symb
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Source
*
Average ? Thresholds ? N_
data
QC1
parameter
Data
downloads
Remarks
method value unit method value
1 QC1DB MEDIAN 12.1 ADU VAL10.2,13.2 16 current_dark this | last_yr | all dark current in Parasitic Light, readout mode 50kHz,2x2,high; BLUE CCD
3 QC1DB MEDIAN 4.07 ADU VAL2.2,5.8 16 current_dark this | last_yr | all same, for REDL CCD
4 QC1DB MEDIAN 2.49 ADU VAL0.1,4.9 16 current_dark this | last_yr | all same, for REDU CCD
*Data sources: QC1DB: QC1 database; LOCAL: local data source
Plot 1
scores: not implemented
data source:uves_dark
(QC1 database)
dataset:current_dark
median:12.1ADU
fixed thresholds:10.2...13.2ADU
N_data plotted:16
[click plot for closeup]
Plot 3
scores: not implemented
data source:uves_dark
(QC1 database)
dataset:current_dark
median:4.07ADU
fixed thresholds:2.2...5.8ADU
N_data plotted:16
[click plot for closeup]
Plot 4
scores: not implemented
data source:uves_dark
(QC1 database)
dataset:current_dark
median:2.49ADU
fixed thresholds:0.1...4.9ADU
N_data plotted:16
[click plot for closeup]
This plot

This is the trending report for UVES QC parameters derived from Parasitic Light frames.
These frames are taken approximately once per month, as a single exposure of 3600 secs in a dark enclosure BUT with the CCD shutter OPEN (as compared to the DARK frames where the CCD shutter is closed). These data are de-biased and combined into a MASTER_DARK, in which the average dark level is measured (in ADU/px/hr). [There are also shorter exposures, they are subject to false results. If you find an outlier, check first the exposure time under 'Data downloads'!]

The purpose of these exposures is to detect low-level contaminating light sources (e.g. LEDs) originating INSIDE the instrument.

The thresholds are set to the values defined by the KPI document from IS These plots describe:

  • the DARK current in master PARASITIC_DARK (or PDARK) frames of the BLUE|REDL|REDU chips in the 1x1 binning, 225kHz, low gain readout mode
  • same for the BLUE|REDL|REDU chips in the 2x2 binning, 50kHz, high gain readout mode.
 
General information

Click on any of the plots to see a close-up version.

The latest date is indicated on top of the plot.

If configured,

  • data points belonging to the latest date are specially marked
  • 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