Reference File Types

The fringe correction step uses a FRINGE reference file, which has the same format as the FLAT reference file. This correction is applied only to MIRI MRS (IFU) mode exposures, which are always single full-frame 2-D images.

CRDS Selection Criteria

Fringe reference files are selected by DETECTOR and GRATNG14.

Reference File Format

Fringe reference files are FITS format with 3 IMAGE extensions and 1 BINTABLE extension. The primary data array is assumed to be empty. The 3 IMAGE extensions have the following characteristics:

EXTNAME	NAXIS	Dimensions	Data type
SCI	2	ncols x nrows	float
ERR	2	ncols x nrows	float
DQ	2	ncols x nrows	integer

Image dimensions should be 1032 x 1024.

The BINTABLE extension uses EXTNAME=DQ_DEF and contains the bit assignments of the conditions flagged in the DQ array.