PersistenceStep¶

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

PersistenceStep: Correct a science image for persistence.

Create a Step instance.

Parameters:

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

Attributes Summary

`reference_file_types`
`spec`

Methods Summary

process(input) This is where real work happens.

Attributes Documentation

spec = '\n # `input_trapsfilled` is the name of the most recent trapsfilled\n # file for the current detector.\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 # 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 input_trapsfilled = string(default="")\n flag_pers_cutoff = float(default=40.)\n save_persistence = boolean(default=False)\n save_trapsfilled = boolean(default=True)\n '¶

Methods Documentation

process(input)[source]¶: This is where real work happens. Every Step subclass has to override this method. The default behaviour is to raise a NotImplementedError exception.