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| QC
PLOTS |
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CURRENT |
HISTORY |
| dark
current |
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| 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.
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. There is also a plot trending the dark
current since begin of operations (accessable via the HISTORY link).
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