Fig. 1
Profiles of the intensity (top) and the spectral index (bottom) of the γ-ray power-law emission in the energy band above 100 GeV. Fermi/LAT counts are collected from the circular regions of radius Ψ = 2° around each Galactic longitude of the Galactic plane. The fluxes are normalized on the flux from the Cygnus region at longitude l = 80°. The shaded region marks the part of the Galactic plane in the southern hemisphere. Vertical lines with the names show locations of bright extended VHE γ-ray sources.
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