General Information

The CCD currently in use with EFOSC2 at the ESO 3.60-m Telescope is a backside illuminated LORAL/LESSER CCD #40 chip with 2048x2048 15 micron pixels and has no additional overscan in both X and Y directions.
The current CCD (ESO CCD#40) has been in use at the telescope with EFOSC2 since December 15th, 1997.
Note: The CCD controller (FIERA) was changed August 1th, 1998.

Time Evolution
Standard CCD Test Long CCD Test

Time Evolution

The below plot shows the variation of the bias level, standard light-source (note that often a beta-light is used which, due to radioactive decay, will fade), gain, read-out noise, shutter error, and linearity error as a function of time. The values for the bias, gain and read-out noise are plotted along with the associated measurement error. The blue dashed line in the plots shows the mean value of all the points, while the dotted blue line shows the standard deviation of this distribution. The blue and red points in the bottom plot show the maximum deviations in a positive and negative sense wrt the least-squares fit of the linearity data. Plotted vertically on the bottom of the graph is the date (dd/mm) on which the test was made.

[Click here to download ps file]
Last WebPage Update: Wed Aug 12 16:32:09 UTC 2009

For printing, the above plot is also available in postscript format . The raw data can also be viewed in a tabular format


Last Standard CCD Test results 

 
 
     ==========================================================
     SUMMARY STANDARD TEST CCD#40 TAKEN ON 090523 IN 00 MODE
     ==========================================================
 
      BIAS
      ====
 
      5 biases at start test: average = 202.25 stddev =   6.26
 
      There were 0 hot pixels/columns detected
 
      TRANSFER FUNCTION AND LINEARITY DATA
      ====================================
 
  Table : Std_00_40_090523 
 Sequence Exp_tim1  Med_cnt1  Med_cnt2  Variance  Frc_cnt1  Frc_cnt2  el_adu1  
 -------- --------- --------- --------- --------- --------- --------- ---------
        1      5.71    1484.7    1484.9    1226.6     -0.30     -0.29      1.21
        2     11.43    2968.8    2969.4    2404.7     -0.41     -0.40      1.23
        3     22.86    5939.4    5940.6    4882.2     -0.42     -0.41      1.22
        4     34.29    8917.0    8918.7    8454.5     -0.35     -0.33      1.05
        5     51.43   13394.8   13395.2   11091.6     -0.21     -0.21      1.21
        6     68.57   17885.0   17885.6   14910.3     -0.07     -0.08      1.20
        7     85.71   22389.6   22388.6   18488.9      0.07      0.06      1.21
        8    114.29   29928.6   29928.0   24473.7      0.32      0.31      1.22
        9    142.86   37500.3   37499.3   31348.9      0.56      0.55      1.20
       10    171.43   45111.0   45108.0   37352.2      0.81      0.79      1.21
 -------- --------- --------- --------- --------- --------- --------- ---------
 
      Dynamic range explored: from 1801 to 54709 e-
      Average count rate measured: 261 ADU/sec.
 
      CONV. FACTOR AND RON
      ====================
 
      C.Fact =   1.21 +/-   0.01 e-/ADU
 
      RON    =   7.59 +/-   0.08 e- RMS
 
 
      SHUTTER ERROR
      =============
 
 Average shutter error derived from fractional count rate = -0.010 sec
 
 
      LINEARITY ERROR
      ===============
 
 Average linearity error after shutter correct. = + 0.80/-0.41 %
 
 These errors represent maximum deviation in % from the average
 count rate after correction for shutter delay

In addition, the previous standard tests are available. Click in the table below to access these files.

1 2 3 4 5 6 7
031125.ps.gz 031125.txt 031125_aver.ps 031125_lin1.ps 031125_lin2.ps 031125_trans.ps 031125_hist.ps
031125.ps.gz 031125.txt 031125_aver.ps 031125_lin1.ps 031125_lin2.ps 031125_trans.ps 031125_hist.ps
031125.ps.gz 031125.txt 031125_aver.ps 031125_lin1.ps 031125_lin2.ps 031125_trans.ps 031125_hist.ps
031125.ps.gz 031125.txt 031125_aver.ps 031125_lin1.ps 031125_lin2.ps 031125_trans.ps 031125_hist.ps
031125.ps.gz 031125.txt 031125_aver.ps 031125_lin1.ps 031125_lin2.ps 031125_trans.ps 031125_hist.ps
031125.ps.gz 031125.txt 031125_aver.ps 031125_lin1.ps 031125_lin2.ps 031125_trans.ps 031125_hist.ps
031125.ps.gz 031125.txt 031125_aver.ps 031125_lin1.ps 031125_lin2.ps 031125_trans.ps 031125_hist.ps
031125.ps.gz 031125.txt 031125_aver.ps 031125_lin1.ps 031125_lin2.ps 031125_trans.ps 031125_hist.ps
030821.ps.gz 030821.txt 030821_aver.ps 030821_lin1.ps 030821_lin2.ps 030821_trans.ps 030821_hist.ps
030821.ps.gz 030821.txt 030821_aver.ps 030821_lin1.ps 030821_lin2.ps 030821_trans.ps 030821_hist.ps
030821.ps.gz 030821.txt 030821_aver.ps 030821_lin1.ps 030821_lin2.ps 030821_trans.ps 030821_hist.ps
030821.ps.gz 030821.txt 030821_aver.ps 030821_lin1.ps 030821_lin2.ps 030821_trans.ps 030821_hist.ps
030821.ps.gz 030821.txt 030821_aver.ps 030821_lin1.ps 030821_lin2.ps 030821_trans.ps 030821_hist.ps
030821.ps.gz 030821.txt 030821_aver.ps 030821_lin1.ps 030821_lin2.ps 030821_trans.ps 030821_hist.ps
030821.ps.gz 030821.txt 030821_aver.ps 030821_lin1.ps 030821_lin2.ps 030821_trans.ps 030821_hist.ps
030821.ps.gz 030821.txt 030821_aver.ps 030821_lin1.ps 030821_lin2.ps 030821_trans.ps 030821_hist.ps
030710.ps.gz 030710.txt 030710_aver.ps 030710_lin1.ps 030710_lin2.ps 030710_trans.ps 030710_hist.ps
030814.ps.gz 030814.txt 030814_aver.ps 030814_lin1.ps 030814_lin2.ps 030814_trans.ps 030814_hist.ps
030814.ps.gz 030814.txt 030814_aver.ps 030814_lin1.ps 030814_lin2.ps 030814_trans.ps 030814_hist.ps
030814.ps.gz 030814.txt 030814_aver.ps 030814_lin1.ps 030814_lin2.ps 030814_trans.ps 030814_hist.ps
030814.ps.gz 030814.txt 030814_aver.ps 030814_lin1.ps 030814_lin2.ps 030814_trans.ps 030814_hist.ps
030814.ps.gz 030814.txt 030814_aver.ps 030814_lin1.ps 030814_lin2.ps 030814_trans.ps 030814_hist.ps
030814.ps.gz 030814.txt 030814_aver.ps 030814_lin1.ps 030814_lin2.ps 030814_trans.ps 030814_hist.ps
030814.ps.gz 030814.txt 030814_aver.ps 030814_lin1.ps 030814_lin2.ps 030814_trans.ps 030814_hist.ps
030814.ps.gz 030814.txt 030814_aver.ps 030814_lin1.ps 030814_lin2.ps 030814_trans.ps 030814_hist.ps
030807.ps.gz 030807.txt 030807_aver.ps 030807_lin1.ps 030807_lin2.ps 030807_trans.ps 030807_hist.ps
030807.ps.gz 030807.txt 030807_aver.ps 030807_lin1.ps 030807_lin2.ps 030807_trans.ps 030807_hist.ps
030807.ps.gz 030807.txt 030807_aver.ps 030807_lin1.ps 030807_lin2.ps 030807_trans.ps 030807_hist.ps
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030805.ps.gz 030805.txt 030805_aver.ps 030805_lin1.ps 030805_lin2.ps 030805_trans.ps 030805_hist.ps
030805.ps.gz 030805.txt 030805_aver.ps 030805_lin1.ps 030805_lin2.ps 030805_trans.ps 030805_hist.ps
030805.ps.gz 030805.txt 030805_aver.ps 030805_lin1.ps 030805_lin2.ps 030805_trans.ps 030805_hist.ps
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030805.ps.gz 030805.txt 030805_aver.ps 030805_lin1.ps 030805_lin2.ps 030805_trans.ps 030805_hist.ps
030805.ps.gz 030805.txt 030805_aver.ps 030805_lin1.ps 030805_lin2.ps 030805_trans.ps 030805_hist.ps
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030731.ps.gz 030731.txt 030731_aver.ps 030731_lin1.ps 030731_lin2.ps 030731_trans.ps 030731_hist.ps
030731.ps.gz 030731.txt 030731_aver.ps 030731_lin1.ps 030731_lin2.ps 030731_trans.ps 030731_hist.ps
030731.ps.gz 030731.txt 030731_aver.ps 030731_lin1.ps 030731_lin2.ps 030731_trans.ps 030731_hist.ps
030710.ps.gz 030710.txt 030710_aver.ps 030710_lin1.ps 030710_lin2.ps 030710_trans.ps 030710_hist.ps
030710.ps.gz 030710.txt 030710_aver.ps 030710_lin1.ps 030710_lin2.ps 030710_trans.ps 030710_hist.ps
030710.ps.gz 030710.txt 030710_aver.ps 030710_lin1.ps 030710_lin2.ps 030710_trans.ps 030710_hist.ps
030710.ps.gz 030710.txt 030710_aver.ps 030710_lin1.ps 030710_lin2.ps 030710_trans.ps 030710_hist.ps
030710.ps.gz 030710.txt 030710_aver.ps 030710_lin1.ps 030710_lin2.ps 030710_trans.ps 030710_hist.ps
030710.ps.gz 030710.txt 030710_aver.ps 030710_lin1.ps 030710_lin2.ps 030710_trans.ps 030710_hist.ps
030710.ps.gz 030710.txt 030710_aver.ps 030710_lin1.ps 030710_lin2.ps 030710_trans.ps 030710_hist.ps

 

 

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Last modified: 12/08/09 

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