NIRISS Observing Strategies

JWST's Near Infrared Imager and Slitless Spectrograph (NIRISS) provides slitless spectroscopy, high-contrast imaging and direct imaging over a 2.2' × 2.2' FOV from 0.6 to 5.2 μm. Recommendations are given to guide users on choosing observing parameters, minimizing contamination, and designing efficient science proposals.

NIRISS has three prime observing modes: wide field slitless spectroscopy (WFSS) from 0.8 to 2.2 μm, single object slitless spectroscopy (SOSS) from 0.6 to 2.8 μm which functions as the time-series observation (TSO) mode for NIRISS, and aperture masking interferometry (AMI) from 2.8 to 4.8 μm. NIRISS offers imaging from 0.8 to 5.0 μm as a coordinated parallel mode when another JWST instrument is prime.

For each observing mode, advice is given on choosing observing parameters, designing efficient science proposals, and other mode-specific considerations in these article:

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