.. _mask_selectors:

Reference Selection Keywords for MASK
+++++++++++++++++++++++++++++++++++++
CRDS selects appropriate MASK references based on the following keywords.
MASK is not applicable for instruments not in the table.

========== ==========================================================
Instrument Keywords                                                   
========== ==========================================================
FGS        INSTRUME, DETECTOR, SUBARRAY, EXP_TYPE, DATE-OBS, TIME-OBS 
MIRI       INSTRUME, DETECTOR, SUBARRAY, DATE-OBS, TIME-OBS           
NIRCam     INSTRUME, DETECTOR, SUBARRAY, DATE-OBS, TIME-OBS           
NIRISS     INSTRUME, DETECTOR, SUBARRAY, DATE-OBS, TIME-OBS           
NIRSpec    INSTRUME, DETECTOR, SUBARRAY, READPATT, DATE-OBS, TIME-OBS 
========== ==========================================================

