Figure 2: Antenna pattern response functions of an interferometer (see Eqs. (58)) for .
Panels (a) and (b) show the plus () and cross () modes, panels (c) and (d) the vector
x and vector y modes ( and ), and panel (e) shows the scalar modes (up to a sign, it is
the same for both breathing and longitudinal). Color indicates the strength of the response with red
being the strongest and blue being the weakest. The black lines near the center give the orientation
of the interferometer arms.