scholarly journals Search for Ultra-high Energy Photons: Observing the Preshower Effect with Gamma-ray Telescopes

2019 ◽  
Author(s):  
Dariusz Gora ◽  
Kevin Almeida Cheminant ◽  
David E. Alvarez Castillo ◽  
Niraj Dhital ◽  
Piotr Homola ◽  
...  
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Gamma Ray Telescopes

scholarly journals Search for ultra-high energy photons through preshower effect with gamma-ray telescopes: Study of CTA-North efficiency

2020 ◽  
Vol 123 ◽  
pp. 102489
Author(s):  
Kévin Almeida Cheminant ◽  
Dariusz Góra ◽  
David E. Alvarez Castillo ◽  
Aleksander Ćwikła ◽  
Niraj Dhital ◽  
...  
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Gamma Ray Telescopes

Prospects for High Energy Detection of Microquasars with the AGILE and GLAST Gamma‐Ray Telescopes

2007 ◽  
Author(s):  
Patrizia Santolamazza ◽  
Carlotta Pittori ◽  
Francesco Verrecchia
Keyword(s):  
Gamma Ray ◽  
Energy Detection ◽  
High Energy ◽  
Gamma Ray Telescopes

scholarly journals Gamma-ray counterparts of 2WHSP high-synchrotron-peaked BL Lac objects as possible signatures of ultra-high-energy cosmic ray emission

2020 ◽  
Vol 497 (2) ◽  
pp. 2455-2468
Author(s):  
Michael W Toomey ◽  
Foteini Oikonomou ◽  
Kohta Murase
Keyword(s):  
Energy Range ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
High Energy ◽  
Potential Candidate ◽  
Ultra High Energy ◽  
Bl Lac Objects ◽  
Cherenkov Telescopes ◽  
Bl Lac ◽  
Γ Ray

ABSTRACT We present a search for high-energy γ-ray emission from 566 Active Galactic Nuclei at redshift z > 0.2, from the 2WHSP catalogue of high-synchrotron peaked BL Lac objects with 8 yr of Fermi-LAT data. We focus on a redshift range where electromagnetic cascade emission induced by ultra-high-energy cosmic rays can be distinguished from leptonic emission based on the spectral properties of the sources. Our analysis leads to the detection of 160 sources above ≈5σ (TS ≥25) in the 1–300 GeV energy range. By discriminating significant sources based on their γ-ray fluxes, variability properties, and photon index in the Fermi-LAT energy range, and modelling the expected hadronic signal in the TeV regime, we select a list of promising sources as potential candidate ultra-high-energy cosmic ray emitters for follow-up observations by Imaging Atmospheric Cherenkov Telescopes.

Development of the Buckland Park Cosmic Ray Air Shower Array for Ultra High Energy Gamma Ray Astronomy

1986 ◽  
Vol 6 (3) ◽  
pp. 335-338 ◽  
Author(s):  
D. Ciampa ◽  
R. W. Clay ◽  
C. L. Corani ◽  
P. G. Edwards ◽  
J. R. Patterson
Keyword(s):  
Gamma Ray ◽  
Cosmic Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Gamma Ray Astronomy ◽  
Air Shower ◽  
High Energy Gamma ◽  
Energy Gamma ◽  
Shower Array ◽  
Air Shower Array

AbstractThe Buckland Park air shower array is being developed particularly for use as an ultra-high-energy gamma ray astronomy telescope. The properties of this instrument are described with an emphasis on improvements being made to its angular resolution. Some early data are presented to illustrate the way in which the data obtained will be used.

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