CRIRES trending system: HISTORY plot
Last update: 2007-04-15T19:11:42 (UT)
same group: darkmed ron_raw
close window history: 2007   2008   2009 2010 2011 2012 2013 2014   HEALTH FULL
  ... ... ... ... ... ...
*Date on this monitor changes at 21:00 UT
Print: Information and research:
- png file - advanced studies: QC1 browser | QC1 plotter
Plot Symbol
[info]		 Source* Average [info] Thresholds [info] N_data Data downloads Remarks
method value unit method value
1 •QC1DB MEDIAN3.456 ADU 3SIG± 0.218 20 this | last_yr | all RON, chip 1, DIT=1
2 •QC1DB MEDIAN3.543 ADU 3SIG± 0.816 38 this | last_yr | all RON, chip 2, DIT=1
3 •QC1DB MEDIAN3.670 ADU 3SIG± 0.109 42 this | last_yr | all RON, chip 3, DIT=1
4 •QC1DB MEDIAN4.094 ADU 3SIG± 0.515 66 this | last_yr | all RON, chip 4, DIT=1
5 •QC1DB MEDIAN1.800 ADU 3SIG± 0.351 2 this | last_yr | all RON, chip 1, DIT=300
6 •QC1DB MEDIAN2.064 ADU 3SIG± 0.163 33 this | last_yr | all RON, chip 2, DIT=300
7 •QC1DB MEDIAN2.234 ADU 3SIG± 0.175 2 this | last_yr | all RON, chip 3, DIT=300
8 •QC1DB MEDIAN2.247 ADU 3SIG± 0.736 4 this | last_yr | all RON, chip 4, DIT=300
*Data sources: OPSLOG: Paranal ops logs; QC1DB: QC1 database; LOCAL: local text file
This plot

Trending plot for CRIRES RON as determined from DARK exposures.

The read-out noise is measured from the difference of the 3rd and 2nd dark image using the following procedure:
- generate 100 13x13 pixel windows
- compute the pixel standard deviation in each window
- the read-out noise is the median of these measurements multiplied with sqrt(NDIT/2).

The trending shows RON from DIT=1sec and DIT=300sec exposures for all four chips.  

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