Reference File Types

The MIRI MRS straylight correction step uses a straylight mask. There are three MIRI MRS SW masks, one for each of the three bands (SHORT,MEDIUM and LONG).

CRDS Selection Criteria

MIRI MRS reference files are selected on the basis of INSTRUME, DETECTOR, and BAND values from the input science data set.

MIRI MRS straylight Reference File Format

The straylight mask reference files are FITS files with one IMAGE extension. This image extension is a 2-D integer mask file of size 1032 X 1024. The mask contains values of 1 for pixels that fall in the slice gaps and values of 0 for science pixels. The straylight algorithm only uses pixels that fall in the slice gaps to determine