Dark Subtraction
Overview
Subtracts the dark current from the input data.
Class: DarkSubtractionStep
Algorithm
The appropriate master dark calibration is subtracted from the input data. The input’s err attribute is updated by adding the dark’s err attribute in quadarature. DQ flags are updated with bitwise or.
Any pixel values in the dark reference data that are set to NaN will have their values reset to zero before being subtracted from the science data, which will effectively skip the dark subtraction operation for those pixels.
Arguments
- input
str|LigerIRISDataModel The input data to remove the dark from.
- dark
str|DarkModel The name of the dark reference file or a dark model instance. If not provided, the dark is retrieved from the appropriate archive.
Subarrays
The dark current is dependent on the detector read mode, therefore subarrays are corrected using the specified read mode.