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GIRAFFE trending system: KPI report
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Last update: 2025-12-18T16:41:27 (UT)
  | now: 2025-12-18T17:55:34 (UT) muc02 QC pipeline: giraf-2.16.14 (installed 2024-10-16)
General news: NOTE: The Health Check and calChecker services are moved to qcFlow on an instrument by instrument basis. The current pages will not be updated any longer once the move has been finished.
GIRAFFE news:  
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scores&comments | history: all data plotted here | plot tutorial ... | contact | HC_docu... | quality events...               [?] 		*Date on this monitor changes at 21:00 UT
png: Information and research:
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Plot
?		 Symb
?		 Source
*		 Average ? Thresholds ? N_
data		 QC1
parameter		 Data
downloads		 Remarks
method value unit method value
1 •QC1DB none   e- none  1170 sigma_raw all (full time range) RON of single raw frame.'Normal' read mode
a) Data for old CCD, until 2008.
[! downloaded data come in ADU (=e-/2.25)]
1 •QC1DB none   e- none  5448 sigma_raw all (full time range) b) Data for current CCD ("new"); reference: 3.9 e-, stable median value; a value of 4.3 e- has been measured on Paranal during commissioning in May 2008
[! downloaded data come in ADU (=e-/2.25)]
2 •QC1DB none   e- none  5093 sigma_raw all (full time range) 'Fast' read mode, current CCD only; reference: 4.8 e-, a value of 5.2 e- has been measured on Paranal during commissioning in May 2008
[! downloaded data come in ADU (=e-/2.4)]
*Data sources: QC1DB: QC1 database; LOCAL: local data source
Plot 1
data source:giraffe_bias
(QC1 database)
dataset:
(numbers below apply to this dataset)		sigma_raw•
average:none
thresholds:none
N_data plotted:1170
(current) reference:3.85
[click plot for closeup]
Plot 2
data source:giraffe_bias
(QC1 database)
dataset:sigma_raw•
average:none
thresholds:none
N_data plotted:5093
(current) reference:4.8
[click plot for closeup]
This plot

This is the instrument performance plot for the GIRAFFE read noise. We display both the 'normal' read mode (used by default and in almost all OBs) and the 'Fast' read mode (monitored regularly but rarely used for science).

The read noise displayed here refers to a single raw frame. We display the parameter in electrons, while the downloaded data come in ADU.

The label 'new CCD' refers to the current CCD in use since May 2008.  

General information

Click on any of the plots to see a close-up version.

The latest date is indicated on top of the plot.

If configured,

  • data points belonging to the latest date are specially marked
  • 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