Plot
? |
Symb
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Source
* |
Average ? |
Thresholds ? |
N_
data |
QC1
parameter |
Data
downloads |
Remarks |
| method |
value |
unit |
method |
value |
| 1 |
• | QC1DB |
none |
|
R |
none | |
2010 |
mean_R |
all (full time range)
| Resolving power R (λ0/Δλ), high-resolution grating HR.
HC setting H525.8B
Medusa1 |
| 1 |
• | QC1DB |
none |
|
R |
none | |
20 |
mean_R |
all (full time range)
| same, initial years, from reprocessing |
| 2 |
x | QC1DB |
none |
|
R |
none | |
1992 |
mean_R |
all (full time range)
| Medusa2 |
| 2 |
x | QC1DB |
none |
|
R |
none | |
18 |
mean_R |
all (full time range)
| same, initial years, from reprocessing |
| 3 |
∗ | QC1DB |
none |
|
R |
none | |
968 |
mean_R |
all (full time range)
| IFU1 |
| 4 |
▲ | QC1DB |
none |
|
R |
none | |
984 |
mean_R |
all (full time range)
| IFU2 |
| 5 |
• | QC1DB |
none |
|
R |
none | |
965 |
mean_R |
all (full time range)
| Argus |
|
| 6 |
• | QC1DB |
none |
|
R |
none | |
2302 |
mean_R |
all (full time range)
| Resolving power R, low-resolution grating LR.
HC setting L543.1
Medusa1 |
| 6 |
• | QC1DB |
none |
|
R |
none | |
43 |
mean_R |
all (full time range)
| same, initial years, from reprocessing |
| 7 |
x | QC1DB |
none |
|
R |
none | |
2300 |
mean_R |
all (full time range)
| Medusa2 |
| 7 |
x | QC1DB |
none |
|
R |
none | |
47 |
mean_R |
all (full time range)
| same, initial years, from reprocessing |
| |
|
*Data sources: QC1DB: QC1 database; LOCAL: local data source
|
| Plot 1 | | data source: | giraffe_wave
(QC1 database) |
dataset:
(numbers below apply to this dataset) | mean_R | • |
| average: | none |
| thresholds: | none |
| N_data plotted: | 2010 |
| (current) reference: | 31600 |
| [click plot for closeup] |
| Plot 2 | | data source: | giraffe_wave
(QC1 database) |
dataset:
(numbers below apply to this dataset) | mean_R | x |
| average: | none |
| thresholds: | none |
| N_data plotted: | 1992 |
| (current) reference: | 31800 |
| [click plot for closeup] |
| Plot 3 | | data source: | giraffe_wave
(QC1 database) |
| dataset: | mean_R | ∗ |
| average: | none |
| thresholds: | none |
| N_data plotted: | 968 |
| (current) reference: | 51000 |
| [click plot for closeup] |
| Plot 4 | | data source: | giraffe_wave
(QC1 database) |
| dataset: | mean_R | ▲ |
| average: | none |
| thresholds: | none |
| N_data plotted: | 984 |
| (current) reference: | 51000 |
| [click plot for closeup] |
| Plot 5 | | data source: | giraffe_wave
(QC1 database) |
| dataset: | mean_R | • |
| average: | none |
| thresholds: | none |
| N_data plotted: | 965 |
| (current) reference: | 51000 |
| [click plot for closeup] |
| Plot 6 | | data source: | giraffe_wave
(QC1 database) |
dataset:
(numbers below apply to this dataset) | mean_R | • |
| average: | none |
| thresholds: | none |
| N_data plotted: | 2302 |
| (current) reference: | 5800 |
| [click plot for closeup] |
| Plot 7 | | data source: | giraffe_wave
(QC1 database) |
dataset:
(numbers below apply to this dataset) | mean_R | x |
| average: | none |
| thresholds: | none |
| N_data plotted: | 2300 |
| (current) reference: | 5800 |
| [click plot for closeup] |
This is the instrument performance plot for the GIRAFFE
resolution. There are five different fibre systems: Medusa1/2, IFU1/2, and
Argus, and two different gratings, HR and LR. For the HR grating, we display
the resolving power
R =
λ0/Δλ. Δλ is the QC1
parameter mean_resol (QC.RESOL.MEAN)
which is the mean of all accepted emission line widths. HC data are taken
every 3 days for the Medusa slits, and every 7 days for the IFU/Argus slits.
The monitoring is done in the H525.8B setting for the HR grating and L543.1
for the LR grating. For the LR grating,
only the two Medusa settings are taken.
The
reference values are marked in green.
The HR values for the first years (until 2007), when calculated with the then
available
pipeline versions, were systematically wrong due to a bug. Some of these
values have been reprocessed with the current pipeline (giraf-2.5 and higher), they are displayed as
separate
datasets as indicated in plots #1, #2, #6, and #7. They confirm that the
offset in resolution observed for the HR grating was not real. The observed
degradation in the HR resolution until 2015 was real. It was successfully remedied by an
intervention, with the values being stable and close to their optimal level since then.
The difference between the HR Medusa1/2 and the IFU/Argus slits is due to
different fibre diameters.
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
|
mirror sites:
PL (internal
link) HQ
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scores&comments
|
history: all data plotted here
| 