Authors

A. Aab, Universität Siegen
P. Abreu, Instituto Superior Técnico
M. Aglietta, Università degli Studi di Torino
M. Ahlers, University of Wisconsin-Madison
E. J. Ahn, Fermi National Accelerator Laboratory
I. Al Samarai, Institut de Physique Nucléaire d’Orsay
I. F.M. Albuquerque, Universidade de São Paulo
I. Allekotte, Instituto Balseiro
J. Allen, New York University
P. Allison, The Ohio State University
A. Almela, Universidad Tecnologica Nacional
J. Alvarez Castillo, Universidad Nacional Autónoma de México
J. Alvarez-Muñiz, Universidad de Santiago de Compostela
R. Alves Batista, Universität Hamburg
M. Ambrosio, Università degli Studi di Napoli Federico II
A. Aminaei, Radboud Universiteit
L. Anchordoqui, University of Wisconsin-Milwaukee
S. Andringa, Instituto Superior Técnico
C. Aramo, Università degli Studi di Napoli Federico II
F. Arqueros, Universidad Complutense de Madrid
H. Asorey, Instituto Balseiro
P. Assis, Instituto Superior Técnico
J. Aublin, Laboratoire de Physique Nucléaire et de Hautes Energies
M. Ave, Universidad de Santiago de Compostela
M. Avenier, Universite Grenoble Alpes
G. Avila, Pierre Auger Observatory
A. M. Badescu, University Politehnica of Bucharest
K. B. Barber, The University of Adelaide
J. Bäuml, Karlsruher Institut für Technologie, Campus Süd
C. Baus, Karlsruher Institut für Technologie, Campus Süd
J. J. Beatty, The Ohio State University
K. H. Becker, Bergische Universität Wuppertal
J. A. Bellido, The University of Adelaide

Document Type

Article

Publication Date

7-10-2014

Abstract

Measurements of air showers made using the hybrid technique developed with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for point sources of EeV photons anywhere in the exposed sky. A multivariate analysis reduces the background of hadronic cosmic rays. The search is sensitive to a declination band from -85° to +20°, in an energy range from 1017.3 eV to 1018.5 eV. No photon point source has been detected. An upper limit on the photon flux has been derived for every direction. The mean value of the energy flux limit that results from this, assuming a photon spectral index of -2, is 0.06 eV cm-2 s -1, and no celestial direction exceeds 0.25 eV cm-2 s -1. These upper limits constrain scenarios in which EeV cosmic ray protons are emitted by non-transient sources in the Galaxy. © 2014. The American Astronomical Society. All rights reserved..

Publication Source (Journal or Book title)

Astrophysical Journal

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