GMOS-North Detectors : Gain and Readnoise values

The table below gives gain/readnoise values for the current GMOS 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
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)

In original form: Isobel Hook
Last update Feb 28 2001: Inger Jørgensen