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GMOS-N Gain and Read Noise Values (EEV)

The table below gives gain/readnoise values for the original GMOS-N EEV CCDs operating with the SDSU controller. Suggested high and low gain settings are highlighted for both slow and fast readout modes.

sdsuGainSpeed [g,s] 1,0 2,0 5,0 10,0 1,1 2,1 5,1 10,1
Hardware Gain (g) 1.0 2.1 4.8 9.5 1.0 2.1 4.8 9.5
Integrator 4.9 nf 1.0 nf
SDSU Gain number 1 2 3 4 5 6 7 8
CCD Rate Amp Gain Noise Gain Noise Gain Noise Gain Noise Gain Noise Gain Noise Gain Noise Gain Noise
CCD Rate Amp Gain Noise Gain Noise Gain Noise Gain Noise Gain Noise Gain Noise Gain Noise Gain Noise
1 F L 20.60 18.3 9.80 9.5 4.42 5.9 2.17 3.9 5.25 7.3 2.26 4.3 1.12 4.3 0.53 4.6
1 F R 20.00 16.2 9.60 8.9 3.90 5.2 2.14 4.1 5.25 7.1 2.40 4.5 1.07 4.1 0.52 5.1
1 S L 4.39 6.0 2.14 3.5 0.95 3.1 0.48 3.2 1.00 3.4 0.45 3.1 0.20 3.0 0.10 3.0
1 S R 4.20 4.5 2.04 3.5 0.96 3.2 0.44 3.0 0.99 3.3 0.45 3.3 0.20 3.1 0.10 3.1
2 F L 21.00 16.9 9.96 8.6 4.01 4.5 2.44 5.3 4.97 6.4 2.56 6.8 1.19 7.6 0.60 4.8
2 F R 23.00 18.4 12.22 10.5 6.37 7.2 2.58 4.3 5.08 10.0 2.59 4.4 1.13 3.9 0.55 4.0
2 S L 5.00 5.1 2.22 3.5 1.00 3.3 0.63 3.6 1.00 3.6 0.51 3.1 0.22 2.9 0.11 2.9
2 S R 4.07 4.4 2.32 3.3 1.00 3.0 0.45 2.6 1.04 3.0 0.47 2.8 0.21 2.7 0.11 2.9
3 F L 19.14 15.9 10.23 9.3 4.73 5.3 2.45 3.9 4.71 7.8 2.58 4.1 1.14 3.7 0.52 3.7
3 F R 21.80 16.4 11.16 9.2 4.90 5.4 2.37 6.0 4.87 6.1 2.53 5.2 1.17 5.2 0.58 4.2
3 S L 4.32 4.4 2.19 3.0 1.04 2.6 0.50 2.5 1.04 2.7 0.49 2.6 0.22 2.6 0.11 2.6
3 S R 4.44 4.3 2.18 3.3 0.95 2.9 0.50 2.8 1.03 3.3 0.54 3.2 0.24 3.2 0.12 6.2
Ave F 20.92 17.0 10.50 9.3 4.72 5.6 2.36 4.6 5.02 7.4 2.49 4.9 1.14 4.8 0.55 4.4
Ave S 4.40 4.8 2.18 3.4 0.98 3.0 0.50 3.0 1.02 3.2 0.48 3.0 0.21 2.9 0.11 3.4

Rate: S=SLOW (5ns dwell time), F=Fast (1ns dwell time)