Document Type
Article
Publication Date
7-8-2022
Department
Department of Physics
Abstract
Ultra-high-energy photons with energies exceeding 1017 eV offer a wealth of connections to different aspects of cosmic-ray astrophysics as well as to gamma-ray and neutrino astronomy. The recent observations of photons with energies in the 1015 eV range further motivate searches for even higher-energy photons. In this paper, we present a search for photons with energies exceeding 2 × 1017 eV using about 5.5 yr of hybrid data from the low-energy extensions of the Pierre Auger Observatory. The upper limits on the integral photon flux derived here are the most stringent ones to date in the energy region between 1017 and 1018 eV.
Publication Title
Astrophysical Journal
Recommended Citation
Abreu, P.,
Aglietta, M.,
Albury, J.,
Allekotte, I.,
Cheminant, K.,
Almela, A.,
Fick, B.,
Nitz, D.,
Norwood, I.,
Puyleart, A.,
&
et. al.
(2022).
A Search for Photons with Energies above 2 × 10 17 eV Using Hybrid Data from the Low-Energy Extensions of the Pierre Auger Observatory.
Astrophysical Journal,
933(2).
http://doi.org/10.3847/1538-4357/ac7393
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/16335
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Version
Publisher's PDF
Publisher's Statement
© 2022. The Author(s). Published by the American Astronomical Society. Publisher’s version of record: https://doi.org/10.3847/1538-4357/ac7393