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Fig. 8

image

Spectral energy distribution of the SNR G15.4+0.1. The filled squares and triangles with error bars correspond to the emission from the whole remnant and from the interior of the shell (Region I), respectively (data from Brogan et al. 2006, and this work). The shadowed region encompassing a solid line corresponds to the fitted power law and the one sigma region of the X-ray data. The HESS TeV data points are indicated by filled circles (Abramowski et al. 2014), while the arrows pointing downwards show the upper limits in the Fermi-LAT spectrum (Acero et al. 2013). The dashed lines labelled I and II mark the spectra from Region I, assuming non-thermal X-ray and radio emission originating in the interior of G15.4+0.1, and from Region II in the shell of the remnant, respectively. The modelled spectra from the synchrotron radiation by electrons, inverse Compton on the CMB, Bremsstrahlung, and γ rays produced by neutral pions generated in proton-proton interactions are indicated by the curves labelled S, IC, B, and π0, respectively.

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