sherpa.astro.ui.ignore_bad(id=None, bkg_id=None)

Exclude channels marked as bad in a PHA data set.

Ignore any bin in the PHA data set which has a quality value that is larger than zero.

Parameters
• id (int or str, optional) – The data set to change. If not given then the default identifier is used, as returned by get_default_id.

• bkg_id (int or str, optional) – The identifier for the background (the default of None uses the first component).

Raises

sherpa.utils.err.DataErr – If the data set has no quality array.

ignore()

Exclude data from the fit.

notice()

Include data in the fit.

set_quality()

Apply a set of quality flags to a PHA data set.

Notes

The load_pha command - and others that create a PHA data set - do not exclude these bad-quality bins automatically.

If the data set has been grouped, then calling ignore_bad will remove any filter applied to the data set. If this happens a warning message will be displayed.

Examples

Remove any bins that are marked bad in the default data set:

>>> load_pha('src.pi')

>>> group_counts('jet', 20)