# ICRC2015

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

## Observation of Anisotropy in the Arrival Direction Distribution of TeV Cosmic Rays With HAWC

Jul 30, 2015, 11:45 AM
15m
World Forum Theater (World Forum)

### World Forum Theater

#### World Forum

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

Daniel Fiorino

### Description

The High-Altitude Water Cherenkov (HAWC) Observatory, located 4100 m above sea level near Pico de Orizaba (19° N) in Mexico, is sensitive to gamma rays and cosmic rays at TeV energies. The arrival direction distribution of cosmic rays at these energies shows significant anisotropy on several angular scales, with a relative intensity ranging between $10^{-3}$ and $10^{-4}$. We present the results of a study of cosmic-ray anisotropy based on more than 100 billion cosmic-ray air showers recorded with HAWC since June 2013. The HAWC cosmic-ray sky map, which has a median energy of 2 TeV, exhibits several regions of significantly enhanced cosmic-ray flux. We present the energy dependence of the anisotropy and the cosmic-ray spectrum in the regions of significant excess.
Collaboration HAWC 1224

### Primary authors

Segev BenZvi (University of Rochester) Stefan Westerhoff (University of Wisconsin-Madison)