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Table 1

Nominal NIRSpec operation configurations.

Band GWA element Resolution λ/ Δλ Filter Spectral range/μm

I G140M, G140H 1000, 2700 F100LP 1.0–1.8
II G235M, G235H 1000, 2700 F170LP 1.7–3.1
III G395M, G395H 1000, 2700 F290LP 2.9–5.2
0.7 G140M, G140H 1000, 2700 F070LP 0.7–1.2
n/a PRISM 100 CLEAR 0.6–5.3
IMA MIRROR n/a F110W, F140X 1.0–1.2, 0.8–2.0

Notes. Nominal combinations of filters and disperser elements in NIRSpec operations. The gratings are used with long-pass filters, and the MIRROR is used with band-pass filters in imaging mode for target acquisition. The additional filter position OPAQUE closes the instrument light path from outside and couples the internal calibration source CAA with the spectrograph.

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