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

Bases: jwst.stpipe.core.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

reference_file_types = ['trapdensity', 'trappars', 'persat']
spec = '\n        # `input_trapsfilled` is the name of the most recent trapsfilled\n        # file for the current detector.\n        input_trapsfilled = string(default="")\n        # Pixels that have received a persistence correction greater than\n        # or equal to `flag_pers_cutoff` DN will be flagged in the pixeldq\n        # extension of the output (rootname_persistence.fits) file.\n        flag_pers_cutoff = float(default=40.)\n        # if `save_persistence` is True, the persistence that was\n        # subtracted (group by group, integration by integration) will be\n        # written to an output file with suffix "_output_pers".\n        save_persistence = boolean(default=False)\n        # If `save_trapsfilled` is True, the updated trapsfilled file will\n        # be written to an output file with suffix "_trapsfilled".\n        save_trapsfilled = boolean(default=True)\n    '

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.