A study of the intergalactic magnetic field using extragalactic ultra-high-energy gamma-ray sources

1989 ◽  
Vol 339 ◽  
pp. 629 ◽  
Author(s):  
M. Honda
Keyword(s):  
Magnetic Field ◽  
Gamma Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
High Energy Gamma ◽  
Energy Gamma ◽  
Intergalactic Magnetic Field

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.

Angular resolution of the KGF experiment to detect ultra high energy gamma-ray sources

1993 ◽  
Vol 19 (7) ◽  
pp. 1053-1068 ◽  
Author(s):  
B S Acharya ◽  
P N Bhat ◽  
A V John ◽  
S G Khairatkar ◽  
B K Nagesh ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Angular Resolution ◽  
High Energy ◽  
Ultra High Energy ◽  
High Energy Gamma ◽  
Energy Gamma

scholarly journals Prospect on intergalactic magnetic field measurements with gamma-ray instruments

2012 ◽  
Vol 8 (S294) ◽  
pp. 459-470
Author(s):  
Hélène Sol ◽  
Andreas Zech ◽  
Catherine Boisson ◽  
Henric Krawczynski ◽  
Lisa Fallon ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Gamma Ray ◽  
Field Measurements ◽  
High Energy ◽  
Wide Field ◽  
Extragalactic Background Light ◽  
Spatially Extended ◽  
Very High Energy ◽  
Energy Gamma ◽  
Intergalactic Magnetic Field

AbstractObserving high-energy gamma-rays from Active Galactic Nuclei (AGN) offers a unique potential to probe extremely tiny values of the intergalactic magnetic field (IGMF), a long standing question of astrophysics, astroparticle physics and cosmology. Very high energy (VHE) photons from blazars propagating along the line of sight interact with the extragalactic background light (EBL) and produce e+e− pairs. Through inverse-Compton interaction, mainly on the cosmic microwave background (CMB), these pairs generate secondary GeV-TeV components accompanying the primary VHE signal. Such secondary components would be detected in the gamma-ray range as delayed “pair echos” for very weak IGMF (B < 10−16G), while they should result in a spatially extended gamma-ray emission around the source for higher IGMF values (B > 10−16G). Coordinated observations with space (i.e. Fermi) and ground-based gamma-ray instruments, such as the present Cherenkov experiments H.E.S.S., MAGIC and VERITAS, the future Cherenkov Telescope Array (CTA) Observatory, and the wide-field detectors such as HAWC and LHAASO, should allow to analyze and finally detect such echos, extended emission or pair halos, and to further characterize the IGMF.

Ultra High Energy Gamma Ray Astronomy at Akeno

1989 ◽  
Vol 8 (2) ◽  
pp. 161-165 ◽  
Author(s):  
P. G. Edwards ◽  
T. Kifune ◽  
M. Mori
Keyword(s):  
Gamma Ray ◽  
Angular Resolution ◽  
High Energy ◽  
Future Research ◽  
Ultra High Energy ◽  
Gamma Ray Astronomy ◽  
High Energy Gamma ◽  
Energy Gamma

AbstractThis paper describes the SPICA array at Akeno, and discusses recent efforts made to improve the angular resolution of the array, concentrating on the determination of the departure of the shower front from a plane. Future research plans are also outlined.

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