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CRIRES trending system: HISTORY plot
Last update: 2010-01-10T04:47:39 (UT)
same group: xcorr ThAr N2O DISP RESOL   AVG
close window history: 2007 2008   2009   2010   2011 2012 2013 2014   HEALTH FULL
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*Date on this monitor changes at 21:00 UT
Print: Information and research:
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Plot
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Symb
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Source
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Average ? Thresholds ? N_
data
QC1
parameter
Data
downloads
Remarks
method value unit method value
1 QC1DB MEDIAN 4045.0144 nm VAL4044.90,4045.35 82 lambda_cent this | last_yr | all center wavelength on chip 1, WREF=4092.9
2 QC1DB MEDIAN 4069.93262 nm VAL4069.80,4070.25 82 lambda_cent this | last_yr | all center wavelength on chip 2, WREF=4092.9
3 QC1DB MEDIAN 4093.55444 nm VAL4093.40,4093.85 82 lambda_cent this | last_yr | all center wavelength on chip 3, WREF=4092.9
4 QC1DB MEDIAN 4115.99463 nm VAL4115.90,4116.30 82 lambda_cent this | last_yr | all center wavelength on chip 4, WREF=4092.9
*Data sources: QC1DB: QC1 database; LOCAL: local text file
This plot

Wavelength calibration: trending of central wavelength.

The central wavelength is monitored for the two daily health check settings with reference wavelengths (on chip 3) of 1090.4nm using ThAr lamp and 4092.9nm using N2O absorption cell. This plot shows the results with N2O.

The center wavelength should be stable on each chip. A shift of 0.01 nm corresponds to a shift of 0.56 pixels. The variation of the central wavelength should be less than about 5 pixels.

Pipeline processing in Garching applies dark subtraction, flat fielding, and slightly different recipe parameters compared to the Paranal online pipeline. Wavelength solutions from processing on Paranal are currently (as of Feb 2010) incorrect and are omitted from plotting.  


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