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

TA Anisotropy Summary

Jul 30, 2015, 2:45 PM
World Forum Theater (World Forum)

World Forum Theater

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution CR-EX Parallel CR03 Aniso


Hiroyuki Sagawa (RIKEN) Igor Tkachev (Russian Academy of Sciences (RU)) Peter Tinyakov (Universite Libre de Bruxelles (ULB))


The Telescope Array has collected 7 years of data and accumulated the largest UHECR data set in the Northern hemisphere. We make use of these data to search for large- and small-scale anisotropy of UHECR. At small angular scales we examine the data for clustering of events and correlations with various classes of putative sources. At large angular scales we will present a blind search for localized excesses of events anywhere on the sky, and find an excess -- the "hot spot" -- at the highest energies by oversampling using a radius of 20 degrees, centered in the constellation Ursa Major. We will estimate the statistical significance of this excess and show how it manifests itself in various other tests. Finally, we will examine the data for correlations with the large-scale structures in the nearby Universe.
Registration number following "ICRC2015-I/" 451
Collaboration Telescope Array

Primary authors

Atsushi Taketani (RIKEN) Benjamin Stokes (University of Utah) Daisuke Ikeda (Institute for Cosmic Ray Research, University of Tokyo) Dmitri Ivanov Gordon Thomson (University of Utah) Grigory Rubtsov (INR RAS) Hiroyuki Sagawa (RIKEN) Hisao Tokuno (UTokyo) Igor Tkachev (Russian Academy of Sciences (RU)) John Matthews (U) Kazumasa Kawata Dr Masahiro Takeda (Institute for Cosmic Ray Research, University of Tokyo) Masaki Fukushima (U) Dr Nobuyuki Sakurai (Osaka City University) Peter Tinyakov (Universite Libre de Bruxelles (ULB)) Ryuji Takeishi (ICRR Univ. Tokyo) Sergey Troitsky (Russian Academy of Sciences (RU)) Dr Shigehiro NAGATAKI (Yukawa Institute for Theoretical Physics, Kyoto University) Takeshi Okuda Dr Toshiyuki Nonaka (Institute for Cosmic Ray Research, University of Tokyo)

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