A promising energy range to look for angular correlations between cosmic rays of extragalactic origin and their sources is at the highest energies, above a few tens of EeV (1 EeV ≡ 1018 eV). Despite the flux of these particles being extremely low, the area of ∼3000 km2 covered at the Pierre Auger Observatory, and the 17 yr data-taking period of the Phase 1 of its operations, have enabled us to measure the arrival directions of more than 2600 ultrahigh- energy cosmic rays above 32 EeV. We publish this data set, the largest available at such energies from an integrated exposure of 122,000 km2 sr yr, and search it for anisotropies over the 3.4π steradians covered with the Observatory. Evidence for a deviation in excess of isotropy at intermediate angular scales, with ∼15° Gaussian spread or ∼25° top-hat radius, is obtained at the 4σ significance level for cosmic-ray energies above ∼40 EeV.
Argentina-Comision Nacional de Energia Atomica
ANPCyT
Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)
Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) 2019/10151-2 2010/07359-6 1999/05404-3
Ministry of Education, Youth & Sports - Czech Republic LTT18004 LM2015038 LM2018102 CZ.02.1.01/0.0/0.0/16_013/0001402 CZ.02.1.01/0.0/0.0/18_046/0016010 CZ.02.1.01/0.0/0.0/17_049/0008422
French National Research Agency (ANR) LABEX ANR-10-LABX-63 ANR-11-IDEX-0004-02
Consejo Nacional de Ciencia y Tecnologia (CONACyT) 167733
Netherlands Organization for Scientific Research (NWO) DIR/WK/2018/11
National Science Centre, Poland 2016/22/M/ST9/00198 2016/23/B/ST9/01635 2020/39/B/ST9/01398
Romania-Ministry of Research, Innovation and Digitization, CNCS/CCCDIUEFISCDI within PNCDI III PN19150201/16N/2019 PN1906010 TE128 PED289
Slovenian Research Agency - Slovenia P1-0031 P1-0385 I0-0033 N1-0111
Spanish Government FPA2017-85114-P PID2019-104676GB-C32
Xunta de Galicia
European Commission ED431C 2017/07
Junta de Andalucia Feder Funds SOMM17/6104/UGR P18-FR-4314
RENATA Red Nacional Tematica de Astroparticulas FPA2015-68783-REDT
Maria de Maeztu Unit of Excellence MDM-2016-0692
United States Department of Energy (DOE) DE-AC02-07CH11359 DE-FR02-04ER41300 DE-FG02-99ER41107 DE-SC0011689
National Science Foundation (NSF) 0450696
Gobierno de la Provincia de Mendoza
Municipalidad de Malargue
NDM Holdings and Valle Las Lenas
Australian Research Council
Belgium -Fonds de la Recherche Scientifique (FNRS)
FWO
Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)
Fundacao de Apoio a Pesquisa do Distrito Federal (FAPDF)
Financiadora de Inovacao e Pesquisa (Finep)
Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio De Janeiro (FAPERJ)
Ministerio da Ciencia, Tecnologia, Inovacoes e Comunicacoes (MCTIC)
France-Centre de Calcul IN2P3/CNRS
France-Centre de Calcul IN2P3/CNRS Centre National de la Recherche Scientifique (CNRS) Departement Sciences de l'Univers (SDU-INSU/CNRS)
Federal Ministry of Education & Research (BMBF) German Research Foundation (DFG) Finanzministerium Baden-Wurttemberg Helmholtz Alliance for Astroparticle Physics (HAP) Helmholtz Association Ministerium fur Innovation, Wissenschaft und Forschung des Landes Nordrhein-Westfalen Ministerium fur Wissenschaft, Forschung und Kunst des Landes Baden-Wurttemberg
Italy-Istituto Nazionale di Fisica Nucleare (INFN)
Istituto Nazionale Astrofisica (INAF)
Ministry of Education, Universities and Research (MIUR)
CETEMPS Center of Excellence
Ministry of Foreign Affairs and International Cooperation (Italy)
Universidad Nacional Autonoma de Mexico
Programa de Apoyo a Proyectos de Investigacion e Innovacion Tecnologica (PAPIIT)
Netherlands-Ministry of Education, Culture and Science Netherlands Organization for Scientific Research (NWO)
SURF Cooperative
Portuguese Foundation for Science and Technology
FEDER funds within Programa Operacional Factores de Competitividade through Fundacao para a Ciencia e a Tecnologia (COMPETE)
The Grainger Foundation x
Marie Curie-IRSES/EPLANET
European Particle Physics Latin American Network
UNESCO