July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

Full-Sky Analysis of Cosmic-Ray Anisotropy with IceCube and HAWC

Jul 30, 2015, 11:30 AM
World Forum Theater (World Forum)

World Forum Theater

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution CR-EX Parallel CR01 Aniso


Juan Carlos Diaz Velez (University of Wisconsin-Madison)


During the past two decades, experiments in both the Northern and Southern hemispheres have observed a small but measurable energy-dependent sidereal anisotropy in the arrival direction distribution of galactic cosmic rays. The relative amplitude of the anisotropy is $10^{−4} - 10^{−3}$. However, each of these individual measurements is restricted by limited sky coverage, and so the pseudo-power spectrum of the anisotropy obtained from any one measurement displays a systematic correlation between different multipole modes $C_\ell$. To address this issue, we present the current state of a joint analysis of the anisotropy on all angular scales using cosmic-ray data from the IceCube Neutrino Observatory located at the South Pole (90° S) and the High-Altitude Water Cherenkov (HAWC) Observatory located at Sierra Negra, Mexico (19° N). We present a combined skymap and an all-sky power spectrum in the overlapping energy range of the two experiments at ~10 TeV. We describe the methods used to combine the IceCube and HAWC data, address the individual detector systematics and study the region of overlapping field of view between the two observatories.
Collaboration IceCube
Registration number following "ICRC2015-I/" 997

Primary authors

Daniel Fiorino (University of Wisconsin-Madison) Juan Carlos Diaz Velez (University of Wisconsin-Madison)

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