A string value listing the open/closed status of all shutters that make up a given MSA slitlet, including an indication of which shutter is treated as the 'main' shutter for the slitlet (i.e. the nominal location of the source). There is one character per shutter that indicates whether the shutter is closed ('0') or open ('1'), and the main shutter is indicated by the character 'x'. For example, a slitlet composed of 5 open shutters with the main shutter being in the middle is represented by the string '11x11'.
| Attribute | Value |
|---|---|
| data type | string |
| enumerated Values | not defined |
| units | |
| example | |
| default value | |
| special processing | OPTIONAL |
| source | Calibration Software |
| software source | |
| calculation | |
| DB destination | ['ScienceSlit.shutsta'] |
| data type in DB | nvarchar(171) |
| instrument | NIRCAM, NIRISS, NIRSPEC |
| mode | NRS_MSASPEC, NRS_FIXEDSLIT, NIS_WFSS, NRC_WFSS |
| product level | 2b |
| FITS hdu | SCI |
| FITS header section | Slit parameters |