Plot [info] |
Symbol [info] |
Source* |
Average [info] |
Thresholds [info] |
N_data |
Data downloads |
Remarks |
method |
value |
unit |
method |
value |
1 |
| QC1DB |
MEDIAN |
3.42272 |
ADU |
3SIG | ± 0.10715 |
85 |
this |
last_yr |
all
|
RON, chip 1, DIT=1 |
2 |
| QC1DB |
MEDIAN |
3.50571 |
ADU |
3SIG | ± 0.87353 |
85 |
this |
last_yr |
all
|
RON, chip 2, DIT=1 |
3 |
| QC1DB |
MEDIAN |
3.65230 |
ADU |
3SIG | ± 0.08914 |
85 |
this |
last_yr |
all
|
RON, chip 3, DIT=1 |
4 |
| QC1DB |
MEDIAN |
4.06910 |
ADU |
3SIG | ± 0.40905 |
85 |
this |
last_yr |
all
|
RON, chip 4, DIT=1 |
5 |
| QC1DB |
MEDIAN |
1.65935 |
ADU |
3SIG | ± 0.23232 |
99 |
this |
last_yr |
all
|
RON, chip 1, DIT=300 |
6 |
| QC1DB |
MEDIAN |
1.94257 |
ADU |
3SIG | ± 0.11530 |
99 |
this |
last_yr |
all
|
RON, chip 2, DIT=300 |
7 |
| QC1DB |
MEDIAN |
2.11541 |
ADU |
3SIG | ± 0.17706 |
99 |
this |
last_yr |
all
|
RON, chip 3, DIT=300 |
8 |
| QC1DB |
MEDIAN |
2.10695 |
ADU |
3SIG | ± 0.61400 |
99 |
this |
last_yr |
all
|
RON, chip 4, DIT=300 |
|
*Data sources: QC1DB: QC1 database; LOCAL: local text file
|
This plot
Trending plot for CRIRES RON as determined from DARK exposures.
The read-out noise is measured from the difference of the 3rd and 2nd dark
image using the following procedure:
- generate 100 13x13 pixel windows
- compute the pixel standard deviation in each window
- the read-out noise is the median of these measurements multiplied with
sqrt(NDIT/2).
The trending shows RON from DIT=1sec and DIT=300sec exposures for all
four chips.
General information
Click on any of the plots to see a close-up version.
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
|