Photon map at energies higher than 10 GeV in the sky region around the bright BL Lac object 1ES 1011+496. Photons in the rich cluster corresponding to the source are reported in red, while the green points are the 8 photons in the cluster 9Y-MST J1016+4949, likely a satellite of the former. Crosses indicate the centroid positions and the radii of the circles represent their Rmax.
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