Reference File

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

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

MIRI MRS straylight Reference File Format

The straylight mask reference files are FITS files with and empty primary data array and one IMAGE extension. This IMAGE extension is a 2-D integer image 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