Differential upper limits on the flux from V339 Del as measured by MAGIC (filled squares) and the flux measured by Fermi-LAT (empty crosses) in the same time period, 2013 August 25 to September 4. The thin solid line shows the IC scattering of thermal photons in the nova’s photosphere. The dashed line shows the γ-rays coming from the decay of π⁰ from hadronic interactions of the relativistic protons with the nova ejecta. The dotted line shows the contribution of γ-rays coming from IC of e⁺e⁻ originating from π⁺π⁻ decays. Thick solid lines show the total predicted spectrum. The total energy of electrons is 6 × 10⁴¹ erg and the assumed proton to electron luminosity ratio is L_p/L_e = 0.1. Electrons and protons are injected with a power law with a spectral index of 1.5 and the cut-offs reported in the figures. Photosphere parameters (see Table 1) obtained from Metzger et al. (2015).