.. _irf-aeff: Effective area ============== as a function of true energy and offset angle (:ref:`gadf:aeff_2d`) ------------------------------------------------------------------- The `~gammapy.irf.EffectiveAreaTable2D` class represents an effective area as a function of true energy and offset angle from the field of view center (:math:`A_{\rm eff}(E_{\rm true}, p_{\rm true})`, following the notation in :ref:`irf-theory`). Its format specifications are available in :ref:`gadf:aeff_2d`. This is the format in which IACT DL3 effective areas are usually provided, as an example .. plot:: irf/plot_aeff.py :include-source: - using a pre-defined effective area parameterisation .. plot:: irf/plot_aeff_param.py :include-source: