Table 3
Instrument parameter values used for the synthetic JWST observations.
| NIRISS SOSS I | NIRSpec G395M | MIRI LRS | |
|
|
|||
| λ range | 0.8–2.8 μm | 2.9–5.0 μm | 5.5-13.5 μm |
| QE | 0.8 | 0.8 | 0.6 |
| FWC | 77 000 e- | 77 000 e- | 250 000 e- |
| Nread | 23 e- | 18 e- | 14 e- |
| DC | 0.02 e- s-1 | 0.01 e- s-1 | 0.2 e- s-1 |
| Ttot | 0.15 | 0.54 | 0.35 |
| Nfloor | 20 ppm | 75 ppm | 40 ppm |
Notes. The collecting area of JWST is assumed to be 24 m2, with a “warm” mirror temperature of 35 K. The abbreviations in the first column stand for the quantum efficiency (QE), the full well capacity (FWC), the readout noise (Nread), the dark current (DC), the total system transmission (Ttot), and the systematics noise floor Nfloor.
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