arXiv:1012.0755·v3·High Energy Astrophysical Phenomena
Measurement of anisotropies in the large-scale diffuse gamma-ray emission
G. A. Gomez-Vargas (for the Fermi-LAT collaboration and E. Komatsu)
Abstract
We have performed the first measurement of the angular power spectrum in the large-scale diffuse emission at energies from 1-50 GeV. We compared results from data and a simulated model in order to identify significant differences in anisotropy properties. We found angular power above the photon noise level in the data at multipoles greater than ~ 100 for energies 1< E <10 GeV. The excess power in the data suggests a contribution from a point source population not present in the model.
Comments: Contribution to SciNeGHE 2010, Trieste, Italy, September 2010; 4 pages, 5 figures