For WFSS data: The footprint of the grism images input into the Level-3 pipeline for WFSS products. This WFSS S_REGION may be sourced from a union of many Level 2 product footprints, leading to a string with many more than the default four vertices. For TSO data: The S_REGION keyword describes the spatial footprint of the data from which the extracted 1-dimensional spectrum was derived. This TSO S_REGION is taken from the first level-2 input's WCS, as it is not expected that the pointing should change between exposures. Note that this keyword is also found in the SCI extension, WCS Parameters section, for imaging modes.
| Attribute | Value |
|---|---|
| data type | string |
| enumerated Values | not defined |
| units | |
| example | POLYGON ICRS 247.883569817 30.206692493 247.901987783 30.174116268 247.864126916 30.158804440 247.846405241 30.190721550 |
| default value | |
| special processing | OPTIONAL |
| source | Calibration Software |
| software source | |
| calculation | |
| DB destination | ['ScienceCommonExt.s_region'] |
| data type in DB | nvarchar(max) |
| instrument | MIRI, NIRCAM, NIRISS, NIRSPEC |
| mode | MIR_WFSS, NRC_WFSS, NIS_WFSS, MIR_LRS-SLITLESS, NIS_AMI, NIS_SOSS, NRC_TSGRISM, NRS_BRIGHTOBJ |
| product level | 3 |
| FITS hdu | EXTRACT1D |
| FITS header section | Spectra Information |