sherpa.astro.ui.plot_arf(id=None, resp_id=None, replot=False, overplot=False, clearwindow=True, **kwargs)

Plot the ARF associated with a data set.

Display the effective area curve from the ARF component of a PHA data set.

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

  • resp_id (int or str, optional) – Which ARF to use in the case that multiple ARFs are associated with a data set. The default is None, which means the first one.

  • replot (bool, optional) – Set to True to use the values calculated by the last call to plot_data. The default is False.

  • overplot (bool, optional) – If True then add the data to an existing plot, otherwise create a new plot. The default is False.

  • clearwindow (bool, optional) – Should the existing plot area be cleared before creating this new plot (e.g. for multi-panel plots)?


sherpa.utils.err.ArgumentErr – If the data set does not contain PHA data.

See also


Return the data used by plot_arf.


Create one or more plot types.


Plot the ARF for the default data set:

>>> plot_arf()

Plot the ARF from data set 1 and overplot the ARF from data set 2:

>>> plot_arf(1)
>>> plot_arf(2, overplot=True)

Plot the ARFs labelled “arf1” and “arf2” for the “src” data set:

>>> plot_arf("src", "arf1")
>>> plot_arf("src", "arf2", overplot=True)

The following example requires that the Matplotlib backend is selected, since this determines what extra keywords plot_arf accepts. The ARFs from the default and data set 2 are drawn together, but the second curve is drawn with a dashed line.

>>> plot_arf(ylog=True)
>>> plot_arf(2, overplot=True, linestyle='dashed')