Hadronic model H1 of the gamma-ray spectrum of W44 superimposed with the gamma-ray data of Fig. 1 (in blue and cyan colors). We find an index p₁ = 2.0 ± 0.1 with a high-energy cut-off at GeV. This model is characterized by B = 210 μG and n = 300 cm^-3. The yellow curve shows the neutral pion emission from the accelerated proton distribution discussed in the text. The dashed black curve show the electron contribution by bremsstrahlung (dashed) emissions. The IC contribution is negligible. The red curve shows the total gamma-ray emission from pion-decay and bremsstrahlung.