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Workflow information system for QC

 

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   UVES IDPs
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Workflow information system for QC  
Last update: 2024-11-04T06:28:53 (UT)
  | now: 2024-11-05T00:15:28 (UT)  
same group: UVES:_SNR  
General news: NOTE: The Health Check and calChecker services are moved to qcFlow on an instrument by instrument basis. The current pages will not be updated any longer once the move has been finished.
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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
?
Symb
?
Source
*
Average ? Thresholds ? N_
data
QC1
parameter
Data
downloads
Remarks
method value unit method value
1 QC1DB none   ratio none  171 mean_s2n this | last_yr | all UVES_STACK, N=1
1 QC1DB none   ratio none  20 mean_s2n this | last_yr | all UVES_STACK, N between 2 and 10
1 QC1DB none   ratio none  5 mean_s2n this | last_yr | all UVES_STACK, N>10

2 QC1DB none   ratio none  925 mean_s2n this | last_yr | all UVES_STACK, N=1
2 QC1DB none   ratio none  122 mean_s2n this | last_yr | all UVES_STACK, N between 2 and 10
2 QC1DB none   ratio none  0 mean_s2n this | last_yr | all UVES_STACK, N>10

3 QC1DB none   ratio none  913 mean_s2n this | last_yr | all UVES_STACK, N=1
3 QC1DB none   ratio none  54 mean_s2n this | last_yr | all UVES_STACK, N between 2 and 10
3 QC1DB none   ratio none  0 mean_s2n this | last_yr | all UVES_STACK, N>10

4 QC1DB none   ratio none  88 mean_s2n this | last_yr | all UVES_STACK, N=1
4 QC1DB none   ratio none  6 mean_s2n this | last_yr | all UVES_STACK, N between 2 and 10
4 QC1DB none   ratio none  0 mean_s2n this | last_yr | all UVES_STACK, N>10

*Data sources: QC1DB: QC1 database; LOCAL: local data source
Plot 1
data source:uves_science_public
(QC1 database)
dataset:
(numbers below apply to this dataset)
mean_s2n
average:none
thresholds:none
N_data plotted:171
[click plot for closeup]
Plot 2
data source:uves_science_public
(QC1 database)
dataset:
(numbers below apply to this dataset)
mean_s2n
average:none
thresholds:none
N_data plotted:925
[click plot for closeup]
Plot 3
data source:uves_science_public
(QC1 database)
dataset:
(numbers below apply to this dataset)
mean_s2n
average:none
thresholds:none
N_data plotted:913
[click plot for closeup]
Plot 4
data source:uves_science_public
(QC1 database)
dataset:
(numbers below apply to this dataset)
mean_s2n
average:none
thresholds:none
N_data plotted:88
[click plot for closeup]
This plot

This plot shows the relation between SNR (called 'mean_s2n' in the database) and average counts (mean_reduced) for the UVES IDPs.
Each individual plot show both the stacked products (whenever the OBs could be stacked) and the single spectra.

The two QC parameters measure the quality of the reduction process: the higher the flux, the higher is the expected SNR if the noise is dominated by photon noise. In case of stacking, the SNR of the products roughly scales with sqrt(N) where N is the number of identical input spectra.

We have selected reference settings 346 and 437 for the BLUE arm (CCD), and 580 and 860 for the RED arm. We have selected data taken in 1x1 binning and without additional optical components (like SLICER or Iodine cell).

The QC parameters plotted here are averages across the whole spectrum. They depend somewhat on the slope of the spectra and therefore on the nature of the targets. This might explain the observed spread in the relations.

 


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