class jwst.persistence.PersistenceStep(name=None, parent=None, config_file=None, _validate_kwds=True, **kws)[source]

Bases: JwstStep

PersistenceStep: Correct a science image for persistence.

Create a Step instance.

  • name (str, optional) – The name of the Step instance. Used in logging messages and in cache filenames. If not provided, one will be generated based on the class name.

  • parent (Step instance, optional) – The parent step of this step. Used to determine a fully-qualified name for this step, and to determine the mode in which to run this step.

  • config_file (str path, optional) – The path to the config file that this step was initialized with. Use to determine relative path names of other config files.

  • **kws (dict) – Additional parameters to set. These will be set as member variables on the new Step instance.

Attributes Summary




Methods Summary


This is where real work happens.

Attributes Documentation

class_alias = 'persistence'
reference_file_types = ['trapdensity', 'trappars', 'persat']
input_trapsfilled = string(default="") # Name of the most recent trapsfilled file for the current detector
flag_pers_cutoff = float(default=40.) # Pixels with persistence correction >= this value in DN will be flagged in the DQ
save_persistence = boolean(default=False) # Save subtracted persistence to an output file with suffix '_output_pers'
save_trapsfilled = boolean(default=True) # Save updated trapsfilled file with suffix '_trapsfilled'

Methods Documentation


This is where real work happens. Every Step subclass has to override this method. The default behaviour is to raise a NotImplementedError exception.