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from pandeia.engine import perform_calculation

result = perform_calculation.perform_calculation(calculation)

where "calculation" is a heirarchical hierarchical input dictionary describing a scene of sources, an instrument setup, and an extraction strategy, and "result" is a hierarchical output dictionary.

Such input dictionaries are available in JWST Webapp download files (as a JSON-formatted file named input.json, suitable for reading in with the built-in Python functions'json' module), or default versions can be created with the function build_default_calc() and then edited:

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The full API documentation, with all possible options and combinations for any instrument, is in the attached file:

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can be found in this file.

Examples

The following calculation defines a JWST NIRCam observation in SW Imaging mode using the full subarray and rapid readout pattern and f070w filter, for a flat-spectrum (in fnu) point source normalized to 0.001 mJy, intended to be observed with a 0.2" aperture. Note that it specifies a precomputed backgroundbackground precomputed for a specific date and celestial location; actual computed user-configured backgrounds are available in the JWST web ETC (and can be downloaded from there)

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The following dictionary defines a Roman WFI Imaging observation with the F062 filter, 1024x1024 subarray (for a similar read time to what 's is expected for Roman WFI Imaging), medium8 readout pattern, and 6 groups; for a 0.001 mJy flat-spectrum point source (in fnu) intended to be observed with a 0.2" aperture.

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