1 Appendix A: Point Source Sensitivities

Point source sensitivity predictions at the center of each grating bandpass based on the web calculator for a dark current of 0.05 e^- s^-1 pix^-1, 0.10″×0.04″ pixels, and no OH line emission are listed in Table 1, Table 2, Table 3, and Table 4.

Table 1: Z Grating Point Source Signal-to-Noise Ratios in 1800 s.

Mag	Strehl Ratio
	0.2	0.4	0.6	0.8	1.0
14.0	134.5	185.5	225.3	...	…
15.0	83.0	115.6	140.9	162.4	181.3
16.0	49.7	70.8	87.1	100.8	112.9
17.0	28.0	41.7	52.4	61.3	69.1
18.0	14.4	22.9	29.7	35.5	40.6
19.0	6.7	11.4	15.5	19.0	22.2
20.0	2.9	5.2	7.3	9.2	11.0
21.0	1.2	2.2	3.1	4.1	5.0

Table 2: J Grating Point Source Signal-to-Noise Ratios in 1800 s.

Mag	Strehl Ratio
	0.2	0.4	0.6	0.8	1.0
14.0	110.4	152.9	185.9	213.9	238.6
15.0	67.5	94.8	115.8	133.7	149.4
16.0	39.6	57.3	71.0	82.4	92.5
17.0	21.6	33.0	41.8	49.3	55.9
18.0	10.6	17.4	23.0	27.8	32.0
19.0	4.8	8.3	11.4	14.3	21.6
20.0	2.0	3.6	5.2	6.6	8.0
21.0	0.8	1.5	2.2	2.9	3.5

Table 3: H Grating Point Source Signal-to-Noise Ratios in 1800 s.

Mag	Strehl Ratio
	0.2	0.4	0.6	0.8	1.0
14.0	95.8	133.0	162.0	186.5	208.1
15.0	58.0	82.0	100.5	116.2	130.0
16.0	33.3	49.0	61.0	71.2	80.1
17.0	17.6	27.5	35.3	41.9	47.7
18.0	8.4	14.1	18.9	23.0	26.7
19.0	3.7	6.5	9.1	11.4	13.6
20.0	1.5	2.8	4.0	5.2	6.3
21.0	0.6	1.2	1.7	2.2	2.7

Table 4: K Grating Point Source Signal-to-Noise Ratios in 1800 s.

Mag	Strehl Ratio
	0.2	0.4	0.6	0.8	1.0
14.0	69.8	98.8	121.1	140.0	156.6
15.0	40.1	59.0	73.5	85.7	96.4
16.0	21.2	33.1	42.5	50.5	57.4
17.0	10.7	16.9	22.7	27.7	32.1
18.0	4.4	7.8	10.9	13.7	16.3
19.0	1.8	3.4	4.8	6.2	7.5
20.0	0.7	1.4	2.0	2.6	3.2