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FORS1 trending system: History Plots
Last update: 2009-04-09T06:52:16 (UT)
| now: 2022-05-23T17:15:57 (UT)  
same group: dark linearity gain   conad fp_noise
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- png file - advanced studies: QC1 browser | QC1 plotter
Average ? Thresholds ? N_
method value unit method value
1 QC1DB no MEDIAN 5.13 e-/hr/px VAL-3,9 17 dark_avg this | last_yr | all C1, high gain
2 QC1DB no MEDIAN 4.58 e-/hr/px VAL4,9 17 sigma_dark_avg this | last_yr | all C1, high gain
3 QC1DB no MEDIAN 3.09 e-/hr/px VAL-3,8 17 dark_avg this | last_yr | all C2, high gain
4 QC1DB no MEDIAN 4.62 e-/hr/px VAL4,8 17 sigma_dark_avg this | last_yr | all C2, high gain
*Data sources: QC1DB: QC1 database; LOCAL: local text file | **OPS: to indicate that OPSLOG data are included
This plot

Dark frames are taken rarely. Used CCD modes are: high gain, 4 and 1 ports. The typical exposure time is 1800 sec. The FORS pipeline generates master DARKs from input raw DARKs with master BIAS subtracted. Dark current: is computed in from the median master dark frame level in ADU/hr/px and transformed into electrons by using the conversion factor CONAD (in the case of 4 ports a mean CONAD is used).  

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