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FORS2 trending system: HISTORY report
Last update: 2012-04-15T03:57:24 (UT)
same group: lambda_c resolution nwave lambda_temp   EEV:lambda_c EEV:resolution EEV:nwave
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*Date on this monitor changes at 21:00 UT
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Plot
?		 Symb
?		 Source
*		 Average ? Thresholds ? N_
data		 QC1
parameter		 Data
downloads		 Remarks
method value unit method value
1 •QC1DB MEDIAN 970.82617 NONE VAL910,1010 86 central_resol this | last_yr | all average resolution at center for chip 1
2 •QC1DB MEDIAN 945.42017 NONE VAL900,1000 86 central_resol this | last_yr | all average resolution at center for chip 2
*Data sources: QC1DB: QC1 database; LOCAL: local text file
Plot 1
data source:fors2_lss_wave
(QC1 database)
dataset:central_resol•
median:970.82617NONE
fixed thresholds:910.0...1010.0NONE
N_data plotted:86
[click on plot for closeup]
Plot 2
data source:fors2_lss_wave
(QC1 database)
dataset:central_resol•
median:945.42017NONE
fixed thresholds:900.0...1000.0NONE
N_data plotted:86
[click on plot for closeup]
This plot

From a wavelength calibrated LSS arc lamp exposure, the mean spectral resolution from all lines in the catalog is computed. Each single spectral resolution is computed as the ratio between the arc lamp line wavelength and its FWHM. The values trended here are for the red sensitive MIT detector, the 300V grism with no filter and a slit width of 0.29".

On 2018-08-28 new pipeline (v.5.3.35) was introduced. The method of calculating spectral resolution changed and the new values are significantly lower.

DB Name: fors2_lss_wave
TPL.ID: FORS2_lss_cal_daycalib
QC1 DB parameter: central_resol

More information can be found on the plot tutorial page  
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