Neutrino spectra for three flavors for one source with same characteristics as in Fig. 1. We show the total spectra (in eV cm⁻²) for a high state SED with L_pk = 10^47.5 erg s⁻¹ (left) and a medium state SED with L_pk = 10⁴⁶ erg s⁻¹ (right). We consider two different distances d_L, 1 = 1.88 Gpc (dark blue) and d_L, 2 = 50 Mpc (light blue). The IceCube and projected GRAND (GRAND Collaboration 2020) sensitivities are also shown (dashed black and green lines). For the IceCube sensitivities, we show two cases depending on the declination: 0° < δ <  30° (most favorable case, thin line) and 30° < δ <  60° (Swift J1644+57 case, thick line) (Aartsen et al. 2014).