Cross-correlating the unresolved gamma-ray background with weak lensing gives an 8.9 sigma detection, dominated by large scales, consistent with blazars in 10^14 solar mass halos providing 30-40% of the background above 10 GeV.
Flat-spectrum radio quasars and bl lacs dominate the anisotropy of the unresolved gamma-ray background
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High-Significance Detection of Correlation Between the Unresolved Gamma-Ray Background and the Large Scale Cosmic Structure
Cross-correlating the unresolved gamma-ray background with weak lensing gives an 8.9 sigma detection, dominated by large scales, consistent with blazars in 10^14 solar mass halos providing 30-40% of the background above 10 GeV.