Plot ? |
Symb ? |
Source * |
Average ? |
Thresholds ? |
N_ data |
QC1 parameter |
Data downloads |
Remarks |
method |
value |
unit |
method |
value |
1 |
| QC1DB |
FIXED |
150 |
ADU |
VAL | 130,190 |
94 |
median_dark |
this |
last_yr |
all
|
median of master dark |
2 |
| QC1DB |
MEDIAN |
6.54 |
ADU |
20% | ± 1.31 |
94 |
ron |
this |
last_yr |
all
|
read out noise of raw frame |
3 |
| QC1DB |
FIXED |
0.025 |
NONE |
VAL | 0.015,0.050 |
94 |
fp_norm |
this |
last_yr |
all
|
fixed-pattern noise of master dark |
4 |
| QC1DB |
MEDIAN |
4.85 |
NONE |
VAL | 2,10 |
94 |
cosmic_rate |
this |
last_yr |
all
|
cosmic hit rate of dark per cm^2 |
|
*Data sources: QC1DB: QC1 database; LOCAL: local data source
|
Plot 1 scores: 9|
| data source: | xshooter_dark (QC1 database) |
dataset: | median_dark | |
fixed average: | 150 | ADU |
fixed thresholds: | 130...190 | ADU |
N_data plotted: | 94 |
[click plot for closeup] |
Plot 3 scores: 9|
| data source: | xshooter_dark (QC1 database) |
dataset: | fp_norm | |
fixed average: | 0.025 | NONE |
fixed thresholds: | 0.015...0.05 | NONE |
N_data plotted: | 94 |
[click plot for closeup] |
Plot 2 scores: 9|
| data source: | xshooter_dark (QC1 database) |
dataset: | ron | |
median: | 6.54 | ADU |
rel. thresholds: ±20% | 5.2356232...7.8534348 | ADU |
N_data plotted: | 94 |
[click plot for closeup] |
Plot 4 scores: 9|
| data source: | xshooter_dark (QC1 database) |
dataset: | cosmic_rate | |
median: | 4.85 | NONE |
fixed thresholds: | 2...10 | NONE |
N_data plotted: | 94 |
[click plot for closeup] |
This plot
Here we show various parameters for NIR dark frames: median level and
rms of the master dark, the cosmic ray hit rate (per second and unit
area), and the amplitude of the fixed pattern divided by the dark_med value.
For DIT=1.0, darks are acquired with NDIT=3, for all other DIT, darks are acquired with NDIT=1.
For DIT=5sec: from 2018-11 on darks are taken with NDIT=1, before with NDIT=5.
For more information see 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
|