20 years of Arrival Direction Studies at the Pierre Auger Observatory

Abstract The Pierre Auger Observatory is the largest detector for ultrahigh-energy astroparticles in the world. Located in Argentina, it observes cosmic rays from approximately 80% of the sky, including the Galactic Center. The Observatory is sensitive to cosmic rays at energies of approximately 10PeV up to the highest energies, and significant discoveries in cosmic ray research were made with the collected data; for example, the discovery of a modulation in right ascension above 8EeV with a current significance of 6.9 σ , suggesting an extragalactic origin of ultrahigh-energy cosmic rays. Furthermore, searches for localized and intermediate-scale excesses are ongoing. We present the latest results of searches for anisotropy in the Auger data, and we outline future prospects using novel analysis methods and the data from Phase II of the Observatory.