Cross-correlation of weak lensing and gamma rays: implications for the nature of dark matter

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We measure the cross-correlation between Fermi-LAT gamma-ray photons and over 1000 deg$^2$ of weak lensing data from the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS), the Red Cluster Sequence Lensing Survey (RCSLenS), and the Kilo Degree Survey (KiDS).

• We present the first measurement of tomographic weak lensing cross-correlations and the first application of spectral binning to cross-correlations between gamma rays and weak lensing.
• The measurements are performed using an angular power spectrum estimator while the covariance is estimated using an analytical prescription.
• We verify the accuracy of our covariance estimate by comparing it to two internal covariance estimators.