dfactor# jeanspy.model.AxisymmetricZhaoModel.dfactor Class and construction: AxisymmetricZhaoModel. AxisymmetricZhaoModel.dfactor(dist_pc, roi_deg, *, inclination=1.5707963267948966, **quadrature)[source]# Finite-cone decay factor in GeV cm^-2; finite r_t_pc required.