Fig. 4
Fermi-LAT count map of the 20° × 20° around W49B between 60 MeV and 300 GeV, smoothed with a Gaussian of width 0.3°. Spectral parameters of sources indicated by a diamond are left free in the analysis while sources indicated with crosses are frozen in the likelihood fit. Events were spatially binned in pixels of side-length 0.1°. The dominant source seen at a Galactic longitude of 34.6° in this counts map is W44.
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