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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)
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

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