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VIMOS Quality Control:
dark exposures

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QUALITY CONTROL
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VIMOS QC
Trending & QC1
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QC PLOTS
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dark current (low gain)
dark current (high gain) blue_square
QC1 database (advanced users): browse | plot
   Click on CURRENT to see the current trending (Health Check).
   Click on HISTORY to see the historical evolution of the trending.


Dark frames are typically measured once a month in two read-out modes:

  • low gain, 1x1 binning, 2148x2440, used for imaging,
  • high gain, 1x1 binning, 2148x4096, used for spectroscopy.

All QC parameters are computed in the central 1600x1800 pixels of each CCD.

top Dark current

QC1 parameters

parameter QC1 database: table, name procedure
dark current vimos_bias, dark_avg computed in ADU/hr/pix from the average level of the master and then transformed into e/hr/pix using the conversion factor CONAD

Trending

The dark current is trended for each quadrant and for each read-out mode separately.

History

October 2010: new detectors with lower dark current


 
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