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 |