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Operational Characteristics
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| Speed |
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| Bias(ADU) |
All locations | |
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| Gain(e/ADU) |
All locations | |
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| Noise(e) |
Laboratory | |
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| Noise (ADU) |
3.4 |
2.8 |
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Noise (e) |
Sauron | 3.6 to 4.8 |
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Noise (ADU) |
3.0 to 4.0 |
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Noise (e) |
PNS right arm | 3.6 to 7.2 |
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Noise ((ADU) |
3.0 to 6.0 |
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| Linear to (ADU) |
All locations | |
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| Readout time (s) |
All locations | |
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The detector noise will be somewhere in the range of values shown above, these values were measured either in the lab. or at the telescope on the instrument noted.
All binning modes up to 5 x 2 have been tested with no increase in noise.
Linearity
| Vertical CTE | 0.999994 |
| Horizontal CTE | 0.9999974 |
Physical Characteristics
| X Pixel size | 13.5 microns |
| Y Pixel size | 13.5 microns |
| X size in pixels of digitised area | 2148 |
| Y size in pixels of digitised area | 4200 |
| X size of useful imaging area | 2048 |
| Y size of useful imaging area | 4100 |
| X start of useful imaging area | 51 |
| Y start of useful imaging area | 0 |
| LN2 capacity of cryostat | 2.5 litres |
| Cryostat window thickness | 4 mm |
| Distance from window to CCD | 10.4 mm measured optically |
| Cryostat window size | 36 x 66 mm |
Operational Parameters
| Operating temperature | 153K |
| Preferred amplifier | Left |
Measured Characteristics
Quantum Efficiency
Full QE curve for EEV4280 in tabulated form,
measured at ATC March 99
| Dark current | none measureable @153K |
| Full well bloom limit | 240,000 electrons |
| Chip flatness | |
| Cosmetics
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Using LHS amplifier black columns at 1072, 1073, 476, 477, 478, 385, 386, 387, 388.
See Dark Frame and Flat Field |
| Cosmic Ray count | ~2000 events/chip/hour |
| Fringing See below a graph of fringe amplitude vs wavelength
for an EEV.
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