- orphan
- REFTYPE
REGIONS
- Data model
~jwst.datamodels.RegionsModel
CRDS selects appropriate REGIONS references based on the following keywords. REGIONS is not applicable for instruments not in the table. All keywords used for file selection are required.
| Instrument | Keywords |
|---|---|
| MIRI | INSTRUME, DETECTOR, EXP_TYPE, CHANNEL, BAND, DATE-OBS, TIME-OBS |
The IFU takes a region reference file that defines the pixels on the detector that map to the sky and which IFU slice they correspond to. The reference file is a three-dimensional array measuring 1032 x 1024 x 9. Each of the nine planes within the array represents a two-dimensional detector image for which each pixel has a value indicating the slice to which it belongs. The nine planes each correspond to different throughput thresholds ranging from 10% - 90%; these differ slightly in the effective along-slice size.
- channel
The MIRI channels in the observation, e.g. "12".
- band
The band for the observation (one of "LONG", "MEDIUM", "SHORT").
- regions
An array with the size of the MIRI MRS image where pixel values map to the MRS slice number. 0 indicates a pixel is not within any slice.