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VIMOS trending system: HISTORY report
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Last update: 2018-04-01T03:00:15 (UT)
same group: median_master ron_master rms_master ron_raw median_vs_temp   averages_low averages_high
close window history: 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017   2018   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
?
Symb
?
Source
*
Average ? Thresholds ? N_
data
QC1
parameter
Data
downloads
Remarks
method value unit method value
1 QC1DB MEDIAN 2.89 ADU none  89 ron_bias this | last_yr | all Q2, read noise, low gain
2 QC1DB MEDIAN 2.87 ADU none  89 ron_bias this | last_yr | all Q1, read noise, low gain
3 QC1DB MEDIAN 9.69 ADU none  91 ron_bias this | last_yr | all Q2, read noise, high gain
4 QC1DB MEDIAN 10 ADU none  91 ron_bias this | last_yr | all Q1, read noise, high gain
5 QC1DB MEDIAN 2.78 ADU none  89 ron_bias this | last_yr | all Q3, read noise, low gain
6 QC1DB MEDIAN 2.82 ADU none  89 ron_bias this | last_yr | all Q4, read noise, low gain
7 QC1DB MEDIAN 9.92 ADU none  91 ron_bias this | last_yr | all Q3, read noise, high gain
8 QC1DB MEDIAN 9.26 ADU none  91 ron_bias this | last_yr | all Q4, read noise, high gain
*Data sources: QC1DB: QC1 database; LOCAL: local data source
Plot 1
data source:vimos_bias
(QC1 database)
dataset:ron_bias
median:2.89ADU
thresholds:none 
N_data plotted:89
[click plot for closeup]
Plot 2
data source:vimos_bias
(QC1 database)
dataset:ron_bias
median:2.87ADU
thresholds:none 
N_data plotted:89
[click plot for closeup]
Plot 3
data source:vimos_bias
(QC1 database)
dataset:ron_bias
median:9.69ADU
thresholds:none 
N_data plotted:91
[click plot for closeup]
Plot 4
data source:vimos_bias
(QC1 database)
dataset:ron_bias
median:10ADU
thresholds:none 
N_data plotted:91
[click plot for closeup]
Plot 5
data source:vimos_bias
(QC1 database)
dataset:ron_bias
median:2.78ADU
thresholds:none 
N_data plotted:89
[click plot for closeup]
Plot 6
data source:vimos_bias
(QC1 database)
dataset:ron_bias
median:2.82ADU
thresholds:none 
N_data plotted:89
[click plot for closeup]
Plot 7
data source:vimos_bias
(QC1 database)
dataset:ron_bias
median:9.92ADU
thresholds:none 
N_data plotted:91
[click plot for closeup]
Plot 8
data source:vimos_bias
(QC1 database)
dataset:ron_bias
median:9.26ADU
thresholds:none 
N_data plotted:91
[click plot for closeup]
This plot

Trending plots for bias QC parameters.

All bias parameters are measured in the central 1600x1800 pixels of the detectors. The median bias level and the rms of the master should show a stable trend without sudden jumps or increase/decrease. The read-out noise (ron_raw) is calculated from the difference of the first two raw frames. Some outliers with high values are occasionally observed due to cosmic ray events. The read-out noise as measured from master frames (ron_master) should be extremely stable.

The new detectors (since July 2010) show a correlation of the bias level with temperature, especially for quadrant 2.

Bias frames are usually measured daily during day-time. They come in two different varieties: with low gain (used for imaging) and with high gain (used to calibrate the spectroscopic modes).

Template IDs: img_cal_Dark and spec_cal_Dark. Pipeline recipe: vmbias.  


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