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VIRCAM Quality Control:
Gain

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   Gain
Pipeline
QC links:
gain | read noise | lamp
 
QC PLOTS
  CURRENT HISTORY
gain [ e-/ADU ]
read noise [ e- ]
counts [ ADU ]
lamp flux [ ADU/sec ]
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.

top gain

QC1 parameters

parameter QC1 database: table, name procedure

gain

vircam_gain, qc_gain
- The gain is a conversion factor between the acquired electrons (e-) and the measured counts (ADU). The unit is e-/ADU. Two dome flats of the same flux level are subtracted from each other to minimize the structural noise. From the remaining random noise and the read noise derived from the dark frames the gain is obtained.

 

topread noise

QC1 parameters

parameter QC1 database: table, name procedure
read noise vircam_gain, qc_readnoise - The read noise is derived from two consecutive dark frames. It is given in electrons (e-).

 


toplamp

QC1 parameters

parameter QC1 database: table, name procedure
counts vircam_gain, qc_counts - The counts acquired in the flat frame in ADU .
lamp flux vircam_gain, qc_lflux - The counts acquired in the flat frame divide by ( DIT * NDIT), given in ADU/sec

 
 
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