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GIRAFFE trending system: HISTORY report
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Last update: 2019-02-26T15:49:04 (UT)
same group: dark linearity&gain fp-noise contamination   correlations
close window history: 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024   HEALTH FULL
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*Date on this monitor changes at 21:00 UT
png: Information and research:
- png file - advanced studies: QC1 browser | QC1 plotter
Plot
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Symb
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Source
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Average ? Thresholds ? N_
data
QC1
parameter
Data
downloads
Remarks
method value unit method value
1 QC1DB MEDIAN 0.505 ADU/hr/px VAL0,2 16 current_dark this | last_yr | all DARK current, in ADU per hour per pixel (whole chip)
*Data sources: QC1DB: QC1 database; LOCAL: local data source
Plot 1
data source:giraffe_dark
(QC1 database)
dataset:current_dark
median:0.505ADU/hr/px
fixed thresholds:0...2ADU/hr/px
N_data plotted:16
[click plot for closeup]
This plot

This is the trending plot for the GIRAFFE QC parameters derived from DARK frames. It combines data from the old and the new CCD (since 2008-05).

These frames are taken approximately once per month, as a set of 3 consecutive exposures of 3600 secs each. These data are de-biased and combined into a MASTER_DARK, in which the average dark level is measured (in ADU/px/hr).

Box 1 has the DARK current, in ADU/hr/pix. For the new CCD, it is measured across the whole chip. The old CCD (used until 2008-03) had a significant glow, and the DARK current was measured outside the glow, in a box extending up to row @3800. Box 2 is displayed in history plots up to 2008. It measures the glow itself. Note that there was no glow between 2003-07 and 2004-07-26.

Find more information about GIRAFFE DARK frames here.

Other QC parameters related to detector properties (like contamination, linearity, gain) are trended in the same group.  


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