scholarly journals VERY HIGH ENERGY GAMMA-RAY-INDUCED PAIR CASCADES IN THE RADIATION FIELDS OF DUST TORI OF ACTIVE GALACTIC NUCLEI: APPLICATION TO Cen A

2011 ◽  
Vol 728 (2) ◽  
pp. 134 ◽  
Author(s):  
P. Roustazadeh ◽  
M. Böttcher
Keyword(s):  
Active Galactic Nuclei ◽  
Gamma Ray ◽  
Galactic Nuclei ◽  
High Energy ◽  
High Energy Gamma ◽  
Radiation Fields ◽  
Very High Energy ◽  
Energy Gamma ◽  
Very High

scholarly journals Very-High Energy Gamma-Ray Flux Limits for Nearby Active Galactic Nuclei

2008 ◽  
Author(s):  
T. Herr ◽  
W. Hofmann ◽  
Felix A. Aharonian ◽  
Werner Hofmann ◽  
Frank Rieger ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Gamma Ray ◽  
Galactic Nuclei ◽  
High Energy ◽  
High Energy Gamma ◽  
Very High Energy ◽  
Energy Gamma ◽  
Very High

Very high energy gamma-ray absorption via localized diffuse radiation fields

2012 ◽  
Author(s):  
Andreas Maurer ◽  
Josefa Becerra-Gonzalez ◽  
Martin Raue ◽  
Dieter Horns
Keyword(s):  
Gamma Ray ◽  
Diffuse Radiation ◽  
High Energy ◽  
High Energy Gamma ◽  
Radiation Fields ◽  
Very High Energy ◽  
Energy Gamma ◽  
Very High

scholarly journals Similarity and diversity of black holes - view from the Very High Energies

2016 ◽  
Vol 12 (S324) ◽  
pp. 11-18
Author(s):  
Elina Lindfors
Keyword(s):  
Black Holes ◽  
Active Galactic Nuclei ◽  
Gamma Ray ◽  
Galactic Nuclei ◽  
High Energy ◽  
Mass Scale ◽  
Relativistic Jets ◽  
Very High Energy ◽  
Energy Gamma ◽  
Very High

AbstractActive galactic nuclei, hosting supermassive black holes and launching relativistic jets, are the most numerous objects on the gamma-ray sky. At the other end of the mass scale, phenomena related to stellar mass black holes, in particular gamma-ray bursts and microquasars, are also seen on the gamma-ray sky. While all of them are thought to launch relativistic jets, the diversity even within each of these classes is enormous. In this review, I will discuss recent very high energy gamma-ray results that underline both the similarity of the black hole systems, as well as their diversity.

GROUND-BASED GAMMA-RAY ASTRONOMY

2005 ◽  
Vol 20 (29) ◽  
pp. 6981-6990
Author(s):  
ADRIAN BILAND
Keyword(s):  
Active Galactic Nuclei ◽  
Supernova Remnants ◽  
Gamma Ray ◽  
Galactic Nuclei ◽  
High Energy ◽  
Gamma Ray Astronomy ◽  
Very High Energy ◽  
Energy Gamma ◽  
New Generation ◽  
Very High

Very High Energy Gamma-Ray Astronomy (the measurement of γ above 10 GeV) is a rather young but fast evolving field. In the past 16 years some 20 sources have been discovered, about half of them are firmly established and seen with high significance by more than one experiment. This rather short list already contains very different objects like plerions, supernova remnants and active galactic nuclei. A new generation of instruments (CANGAROO III, HESS, MAGIC, VERITAS) is just starting to take data, and first preliminary results show that the sensitivity is improved by at least a factor of 100. Already during commissioning, some new sources have been discovered. This overview will summarize the techniques used in VHE gamma-ray observations as well discuss briefly some physics topics that can be investigated in this energy range.

scholarly journals A Search for Very High Energy Gamma Rays from Active Galactic Nuclei Visible from the Southern Hemisphere

1999 ◽  
Vol 521 (2) ◽  
pp. 547-551 ◽  
Author(s):  
P. M. Chadwick ◽  
K. Lyons ◽  
T. J. L. McComb ◽  
K. J. Orford ◽  
J. L. Osborne ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Southern Hemisphere ◽  
Gamma Rays ◽  
Galactic Nuclei ◽  
High Energy ◽  
High Energy Gamma ◽  
Very High Energy ◽  
Energy Gamma ◽  
Very High

scholarly journals A STRONG RADIO BRIGHTENING AT THE JET BASE OF M 87 DURING THE ELEVATED VERY HIGH ENERGY GAMMA-RAY STATE IN 2012

2014 ◽  
Vol 788 (2) ◽  
pp. 165 ◽  
Author(s):  
K. Hada ◽  
M. Giroletti ◽  
M. Kino ◽  
G. Giovannini ◽  
F. D'Ammando ◽  
...  
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
High Energy Gamma ◽  
Very High Energy ◽  
Energy Gamma ◽  
Very High
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