Astrophysical interpretation of the anisotropies in the unresolved gamma-ray background

Understand

Recently, a new measurement of the auto- and cross-correlation angular power spectrum (APS) of the isotropic gamma-ray background was performed, based on 81 months of data of the Fermi Large-Area Telescope (LAT).

• Here, we fit, for the first time, the new APS data with a model describing the emission of unresolved blazars.
• These sources are expected to dominate the anisotropy signal.
• The model we employ in our analysis reproduces well the blazars resolved by Fermi LAT.