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| Print: | Information and research: |
| - png file |
- advanced studies:
QC1 browser |
QC1 plotter |
| Plot | Symbol [info] |
Source* | Average [info] | Thresholds [info] | N_data | Data downloads | Remarks | |||
| method | value | unit | method | value | ||||||
| 1 | • | QC1DB | MEDIAN | 0.972 | ADU | 3SIG | ± 0.093 | 3 | this | last_yr | all | 4port readout (Garching) |
| 2 | • | QC1DB | MEDIAN | 0.870 | ADU | 3SIG | ± 0.066 | 22 | this | last_yr | all | 4port readout (Garching) |
| 4 | • | QC1DB | MEDIAN | 0.958 | ADU | 3SIG | ± 0.022 | 3 | this | last_yr | all | 4port readout (Garching) |
| 5 | • | QC1DB | MEDIAN | 0.902 | ADU | 3SIG | ± 0.054 | 10 | this | last_yr | all | 4port readout (Garching) |
| 6 | • | QC1DB | MEDIAN | 1.091 | ADU | 3SIG | ± 0.076 | 3 | this | last_yr | all | 1port readout (Paranal) |
| 3 | x | QC1DB | MEDIAN | 14.200 | ADU | 3SIG | ± 5.480 | 69 | this | last_yr | all | Temperature at Instrument Focus |
| *Data sources: OPSLOG: Paranal ops logs; QC1DB: QC1 database; LOCAL: local text file | ||||||||||
An expected master bias noise is computed as the value of QC OUTi RON, divided by the square root of the number of raw bias frames used in the construction of the master bias. Next, the population standard deviation of the pixel values from port i of the master bias is determined, excluding from the computation all those values that differ from QC OUTi MBIAS LEVEL more than three times the expected noise.
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