Medium-scale anisotropies in the arrival directions of UHECRs observed by the Pierre Auger Observatory

0569012 - FZÚ 2023 RIV IT eng J - Journal Article
Abreu, A. - Aglietta, M. - Albury, J.M. - Bakalová, Alena - Blažek, Jiří - Boháčová, Martina - Chudoba, Jiří - Ebr, Jan - Hamal, Petr - Janeček, Petr - Juryšek, Jakub - Mandát, Dušan - Palatka, Miroslav - Pech, Miroslav - Prouza, Michael - Řídký, Jan - dos Santos, Eva M. Martins - Schovánek, Petr - Tobiška, Petr - Trávníček, Petr … Total 374 authors
Medium-scale anisotropies in the arrival directions of UHECRs observed by the Pierre Auger Observatory.
Nuovo Cimento della Societa Italiana di Fisica C-Geophysics and Space Physics. Roč. 45, č. 5 (2022), č. článku 144. ISSN 1124-1896
R&D Projects: GA MŠMT LTT18004; GA MŠMT LM2015038; GA MŠMT EF16_013/0001402; GA MŠMT(CZ) EF18_046/0016010
Grant - others:OP VVV - AUGER-CZ(XE) CZ.02.1.01/0.0/0.0/16_013/0001402; OP VVV - AUGERII.CZ(XE) CZ.02.1.01/0.0/0.0/18_046/0016010
Research Infrastructure: AUGER-CZ II - 90102
Institutional support: RVO:68378271
Keywords : Ultra High-Energy * Cosmic Rays
OECD category: Particles and field physics
Method of publishing: Open access
https://www.auger.org/archive/authors_2021_09.html

The most prominent obstacle to identifying the sources of UltraHigh-Energy Cosmic Rays (UHECRs) is their incredibly low flux. For this reason, the Pierre Auger Observatory covers an area of ∼3000 km2 and, in its 17 years of operation, has collected over 2600 UHECR events with energies above 32 EeV. In this contribution, I present the search of this dataset for anisotropies on medium scales of a few tenths of degrees in the arrival directions of UHECRs. Evidence for an overdensity in the Centaurus region of the sky is obtained at the 4σ significance level, this evidence is corroborated by a catalog-based likelihood ratio analysis comparing the dataset against the distribution of the closest radiogalaxies and starburst galaxies.
Permanent Link: https://hdl.handle.net/11104/0340324