list_bkg_ids

sherpa.astro.ui.list_bkg_ids(id: IdType | None = None) → list[IdType]

List all the background identifiers for a data set.

A PHA data set can contain multiple background datasets, each identified by an integer or string. This function returns a list of these identifiers for a data set.

Parameters:

idint, str, or None, optional

The data set to query. If not given then the default identifier is used, as returned by get_default_id.

Returns:

idsarray of int or str

The identifiers for the background data sets for the data set. In many cases this will just be [1].

See also

list_response_ids

List all the response identifiers of a data set.

load_bkg

Load the background of a PHA data set.