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FORS2 trending system: KPI report
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Last update: 2025-09-10T16:31:49 (UT)
  | now: 2025-09-10T16:33:21 (UT) muc01 QC pipeline: fors-5.8.3 (installed 2025-05-12)
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.
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scores&comments | history: all data plotted here | plot tutorial ... | contact | HC_docu...               [?] 		*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   NONE none  365 efficiency_8 all (full time range) Relative efficiency for grism 1200R, and filter GG435 (upper CCD), range 6500A; all lss_slit_pos are plotted here
2 •QC1DB none   NONE none  365 efficiency_13 all (full time range) Relative efficiency for grism 1028z, and filter OG590 (upper CCD), range 8500A; all lss_slit_pos are plotted here
3 •QC1DB none   NONE none  365 efficiency_7 all (full time range) Chromatic efficiency plot for grism 1200R, and filter GG435; the values trended in plot1 are marked. The plot is constituted from the following wavelength ranges: 6100A
3 •QC1DB none   NONE none  365 efficiency_8 all (full time range) 6500A
3 •QC1DB none   NONE none  365 efficiency_9 all (full time range) 6900A
3 •QC1DB none   NONE none  365 efficiency_10 all (full time range) 7300A
4 •QC1DB none   NONE none  365 efficiency_12 all (full time range) Chromatic efficiency plot for grism 1028z, and filter OG590 ; the values trended in plot1 are marked. The plot is constituted from the following wavelength ranges: 8100A
4 •QC1DB none   NONE none  365 efficiency_13 all (full time range) 8500A
4 •QC1DB none   NONE none  365 efficiency_14 all (full time range) 8900A
4 •QC1DB none   NONE none  365 efficiency_15 all (full time range) 9300A
*Data sources: QC1DB: QC1 database; LOCAL: local data source
Plot 1
data source:fors2_response
(QC1 database)
dataset:efficiency_8•
average:none
thresholds:none
N_data plotted:365
(current) reference:0.227
[click plot for closeup]
Plot 2
data source:fors2_response
(QC1 database)
dataset:efficiency_13•
average:none
thresholds:none
N_data plotted:365
(current) reference:0.204
[click plot for closeup]
Plot 3
data source:fors2_response
(QC1 database)
dataset:
(numbers below apply to this dataset)		efficiency_7•
average:none
thresholds:none
N_data plotted:365
(current) reference:undefined
[click plot for closeup]
Plot 4
data source:fors2_response
(QC1 database)
dataset:
(numbers below apply to this dataset)		efficiency_12•
average:none
thresholds:none
N_data plotted:365
(current) reference:undefined
[click plot for closeup]
This plot

This is the instrument performance plot for the FORS2 response level from spectroscopic data. The spectrophotometric standard star observations are taken within three days of the corresponding science observations and are meant to provide a response curve for data reduction. They can also be used to determine the efficiency of the spectroscopic modes of FORS2, provided they have been taken under photometric conditions which however is not guaranteed.

Plotted here are:
a) values for the relative efficiency of the system 'telescope + spectroscopic arm of FORS2' (top), at a representative wavelength (indicated in the comment); these values can be used for trending
b) all values for the grism and the order separation filter of the upper plot, displayed over wavelength to obtain a chromatic overview (bottom); the date range is the same as for the upper plot.

Only data points for the upper CCD are plotted. The lower CCD usually has no standard stars and no response curve.

Major mirror interventions (M1, recoating) are marked by a blue vertical bar.

The best current estimate of the efficiency of the spectroscopic modes of FORS2 is the upper envelope of the data points in the upper panel. Under 'data downloads' you find further information regarding the photometric stability of the night ('S' if stable, 'N' if unstable, 'U' if unknown).

More information can be found on the plot tutorial page  

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