Evidence for the Galactic contribution to the IceCube astrophysical neutrino flux
arXiv:1509.03522 · doi:10.1016/j.astropartphys.2015.11.002
Abstract
We show that the Galactic latitude distribution of IceCube astrophysical neutrino events with energies above 100~TeV is inconsistent with the isotropic model of the astrophysical neutrino flux. Namely, the Galactic latitude distribution of the events shows an excess at low latitudes |b|<10 degrees and a deficit at high Galactic latitude |b|> 50 degrees. We use Monte-Carlo simulations to show that the inconsistency of the isotropic signal model with the data is at > 3 sigma level, after the account of trial factors related to the choice of the low-energy threshold and Galactic latitude binning in our analysis.
4 pages, 2 figures, accepted to Astroparticle Physics
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