Reference File Types

The ami_analyze step uses a THROUGHPUT reference file, which contains throughput data for the filter used in the input AMI image. (The ami_average and ami_normalize steps do not use any reference files.)

CRDS Selection Criteria

Throughput reference files are selected on the basis of INSTRUME and FILTER values for the input science data set.

Throughput Reference File Format

Throughput reference files are FITS files with one BINTABLE extension. The FITS primary data array is assumed to be empty. The table extension uses EXTNAME=THROUGHPUT and the data table has the following characteristics:

Column name	Data type	Units
wavelength	float	Angstroms
throughput	float	(unitless)