The sensitivity model for JWST's Mid-Infrared Instrument (MIRI) incorporates ground testing measurements to model parameters such as background, photon conversion efficiency, encircled energy, and detector performance.
Parent page: MIRI Predicted Performance
The performance of JWST has been measured directly at both the component and system level using the fully assembled MIRI flight model in a flight-like radiative environment with a well-characterized radiometric source (Glasse et al. 2015). The results of the JWST throughput measurements have been integrated into a sensitivity model that includes the following components: (1) background, (2) photon conversion efficiency (PCE), (3) encircled energy, and (4) detector performance (Pontoppidan 2016).
The tables and figures below show sensitivity values for a 10,000 s observation to S/N = 10.
Table 1. S/N = 10 in 104 s for MIRI imaging filters assuming FULL1 array
|Filter||Low-background detection limit (μJy)|
Pontoppidan, K. 2016, Proc of SPIE, 9910, 16
Pandeia: a multi-mission exposure time calculator for JWST and WFIRST
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