Capability of the HAWC Gamma-Ray Observatory for the Indirect Detection of Ultrahigh-Energy Neutrinos

Figure 7

Definition of the angles used in the effective area calculation. The grey dashed line represents the orientation of one of the generated vectors. The polar angle is measured between the axis direction and the projection of each vector in the plane; it has values equal to or greater than . The azimuthal angle is measured between the axis direction and the projection of the vectors in the plane; it ranges from 0 to .