get_bkg_source_plot

sherpa.astro.ui.get_bkg_source_plot(id=None, lo=None, hi=None, bkg_id=None)

Return the data used by plot_bkg_source.

Parameters:

• id (int or str, optional) – The data set that provides the data. If not given then the default identifier is used, as returned by get_default_id.
• lo (number, optional) – The low value to plot.
• hi (number, optional) – The high value to plot.
• bkg_id (int or str, optional) – Identify the background component to use, if there are multiple ones associated with the data set.

Returns:

source – An object representing the data used to create the plot by plot_bkg_source.

Return type:

a sherpa.astro.plot.BkgSourcePlot instance

Raises:

• sherpa.utils.err.ArgumentErr – If the data set does not contain PHA data.
• sherpa.utils.err.IdentifierErr – If the bkg_id parameter is invalid.
• sherpa.utils.err.ModelErr – If no model expression has been created for the background data.

See also

get_bkg_model_plot()

Return the data used by plot_bkg_model.

plot_bkg_model()

Plot the model for the background of a PHA data set.

plot_bkg_source()

Plot the model expression for the background of a PHA data set.