Plot
[info] |
Symbol
[info] |
Source* |
OPS?** |
Average [info] |
Thresholds [info] |
N_data |
Data downloads |
Remarks |
| method |
value |
unit |
method |
value |
| 1 |
• | QC1DB |
yes (0) |
MEDIAN |
0.79542 |
pix |
VAL | 0,1 |
59 |
this |
last_yr |
all
|
Q2, rms of dispersion solution |
| 2 |
• | QC1DB |
yes (0) |
MEDIAN |
0.88147 |
pix |
VAL | 0,1 |
59 |
this |
last_yr |
all
|
Q1, rms of dispersion solution |
| 3 |
• | QC1DB |
yes (0) |
MEDIAN |
1.81362 |
pix |
VAL | 0,1 |
59 |
this |
last_yr |
all
|
Q3, rms of dispersion solution |
| 4 |
• | QC1DB |
yes (0) |
MEDIAN |
0.77118 |
pix |
VAL | 0,1 |
59 |
this |
last_yr |
all
|
Q4, rms of dispersion solution |
|
|
|
*Data sources: QC1DB: QC1 database; LOCAL: local text file | **OPS: to indicate if OPSLOG data are included
|
This plot
Trending plot for rms of dispersion solution from MOS arc lamp measurements.
Valid dispersion solutions are those with rms < 1 pixel. However, outliers are
observed regularly. Reasons may be:
- an imperfectly inserted mask
- a wrong first guess model in the header
- multiplexing of the slits in the MOS mask.
Some of these problems can be resolved by fine-tuning pipeline parameters
which is regularly done by QC Garching.
Only arc lamp measurements taken to calibrate MOS science observations are
used; exposures with the standard star masks are disregarded. Arc lamp
measurements should be taken according to the science settings used during the
night.
General information
Click on any of the plots to see a close-up version.
If applicable, the latest values from Paranal ops logs are plotted as blue dots. More information about those values, including a download option, is available in the OPSLOG section on top of the page.
The latest date is indicated on top of the plot, data points belonging to that date are specially marked.
If configured,
- 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
|
