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Fig. 6.

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Upper limits on the WIMP annihilation cross section from stacking. Dotted lines are the averaged individual limits, dashed lines are limits obtained by stacking radial profiles, and solid lines are limits obtained by stacking galaxy images. Red, black, and blue correspond to the OPT, INT, and PES model scenarios, respectively. The thermal freeze-out cross section (Steigman et al. 2012, gray) and upper limits from Fermi-LAT γ-ray observations (Hoof et al. 2020, green) are shown for comparison.

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