Jul 12 – 23, 2021
Europe/Berlin timezone

TA anisotropy summary

Jul 15, 2021, 12:00 PM
1h 30m


Talk CRI | Cosmic Ray Indirect Discussion


Igor Tkachev (INR RAS)


The Telescope Array has collected 12 years of data and accumulated the largest to date 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 several classes of putative sources. At intermediate scales we will present a blind search for localized excesses of events anywhere on the sky -- "hot spots" -- and give an update on the excess in the direction of Ursa Major previously found in the TA data. We will also discuss a related anisotropy of the UHECR spectrum. At largest scales we will test the TA data for the presence of a dipole. Finally, we will examine the data for correlations with the large-scale structures in the nearby Universe.


ultra high energy cosmic rays, anisotropy

Collaboration Telescope Array
Subcategory Experimental Results

Primary authors

Presentation materials