Fig. 1

Composite trichromatic image of the W43 cluster the GLIMPSE 3.6, 5.8 and 8 μm bands in blue, green and red color, respectively. The green and yellow ellipses indicate the positions of the HESS and Fermi LAT sources in the field. The W43 star-forming region, consistent with the HESS position, is also indicated with a white label.
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