We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by photons with an energy above 1019 eV. Photons in the zenith angle range from 30° to 60° can be identified in the overwhelming background of showers initiated by charged cosmic rays through the broader time structure of the signals induced in the water-Cherenkov detectors of the array and the steeper lateral distribution of shower particles reaching ground. Applying the search method to data collected between January 2004 and June 2020, upper limits at 95% CL are set to an E-2 diffuse flux of ultra-high energy photons above 1019 eV, 2 × 1019 eV and 4 × 1019 eV amounting to 2.11 × 10-3, 3.12 × 10-4 and 1.72 × 10-4 km-2 sr-1 yr-1, respectively. W...
Copyright © 2008 Elsevier B.V. All rights reserved.A method is developed to search for air showers i...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
The observation of photons with energies above 10^18 eV would open a new window in cosmic-ray resear...
We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by p...
We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by p...
We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by p...
We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by p...
International audienceWe use the surface detector of the Pierre Auger Observatory to search for air ...
We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by p...
International audienceWe use the surface detector of the Pierre Auger Observatory to search for air ...
A search for ultra-high energy photons with energies above 1 EeV is performed using nine years of da...
The Pierre Auger Observatory is the most sensitive detector to primary photons with energies above ∼...
The Pierre Auger Observatory is the most sensitive detector to primary photons with energies above ∼...
The Pierre Auger Observatory is the most sensitive detector to primary photons with energies above ∼...
The Pierre Auger Observatory is the most sensitive detector to primary photons with energies above ∼...
Copyright © 2008 Elsevier B.V. All rights reserved.A method is developed to search for air showers i...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
The observation of photons with energies above 10^18 eV would open a new window in cosmic-ray resear...
We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by p...
We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by p...
We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by p...
We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by p...
International audienceWe use the surface detector of the Pierre Auger Observatory to search for air ...
We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by p...
International audienceWe use the surface detector of the Pierre Auger Observatory to search for air ...
A search for ultra-high energy photons with energies above 1 EeV is performed using nine years of da...
The Pierre Auger Observatory is the most sensitive detector to primary photons with energies above ∼...
The Pierre Auger Observatory is the most sensitive detector to primary photons with energies above ∼...
The Pierre Auger Observatory is the most sensitive detector to primary photons with energies above ∼...
The Pierre Auger Observatory is the most sensitive detector to primary photons with energies above ∼...
Copyright © 2008 Elsevier B.V. All rights reserved.A method is developed to search for air showers i...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
The observation of photons with energies above 10^18 eV would open a new window in cosmic-ray resear...