GMOS-N Gain and Read Noise Values (e2vDD)
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The table below gives gain (e-/ADU conversion factors) and read-noise values for the GMOS-North
e2v DD (deep depletion) CCDs installed in November 2011. High
and low gain settings for the best amplifiers (3-amp mode) are
highlighted for both slow and fast readout modes. Note: GMOS-North data
obtained before November 1, 2011 should use the EEV gain/read-noise values.
SDSU Gain number | 1 (High) |
2 (Low) |
5 (High) |
6 (Low) |
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CCD | Rate | Amp | Gain | Noise | Gain | Noise | Gain | Noise | Gain | Noise |
1 | F | L | 5.36* | 7.0* | 2.53* | 4.3* | ||||
1 | F | R | 5.34* | 7.8* | 2.53* | 4.2* | ||||
1 | S | L | n/a | n/a | 2.31 | 3.41 | ||||
1 | S | R | n/a | n/a | 2.31 | 3.17 | ||||
2 | F | L | 5.10* | 5.7* | 2.41* | 4.1* | ||||
2 | F | R | 5.27* | 5.8* | 2.50* | 4.1* | ||||
2 | S | L | n/a | n/a | 2.21 | 3.20 | ||||
2 | S | R | n/a | n/a | 2.27 | 3.22 | ||||
3 | F | L | 5.16* | 6.4* | 2.43* | 4.3* | ||||
3 | F | R | 5.41* | 6.3* | 2.56* | 4.4* | ||||
3 | S | L | n/a | n/a | 2.17 | 3.46 | ||||
3 | S | R | n/a | n/a | 2.33 | 3.44 | ||||
Ave | F | 5.27* | 6.5* | 2.49* | 4.2* | |||||
Ave | S | n/a | n/a | 2.27 | 3.32 |
Rate: S=Slow (5µs dwell time), F=Fast (1µs dwell time)
*conversion factors estimated with ~ 5% uncertainty