A search for possible anisotropies of cosmic rays with 0.1<E<10 EeV in the region of the Galactic Centre

TL;DR

This study uses extensive Pierre Auger Observatory data to search for anisotropies in cosmic rays near the Galactic Center at energies between 0.1 and 10 EeV, setting limits on potential point sources and extended excesses.

Contribution

It provides updated anisotropy search results with a larger dataset, improving constraints on cosmic ray sources in the Galactic Center region.

Findings

No significant anisotropy detected.

Set upper limits on flux from a point-like neutron source.

Performed searches for extended excesses.

Abstract

We present updated results for anisotropy searches in the direction of the Galactic Center (GC) at energies in the ranges: 0.1<E<1 EeV and 1<E<10 EeV. We use data from the Pierre Auger Observatory up to March, 2007. Present analyzes are therefore based on a substantially larger data set than our previous published results. A limit on the flux coming from a hypothetical point-like neutron source at the GC for 1<E<10 EeV was imposed, and searches for extended excesses were also performed.