scholarly journals Extragalactic Background Light expected from photon-photon absorption on spectra of distant Active Galactic Nuclei

2013 ◽  
Vol 52 ◽  
pp. 10006
Author(s):  
V.G. Sinitsyna ◽  
V.Y. Sinitsyna
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Photon Absorption ◽  
Extragalactic Background Light ◽  
Background Light

Chapter 3 Extra-galactic Gamma-Ray Sources

2021 ◽  
Author(s):  
Xiang-Yu Wang
Keyword(s):  
Active Galactic Nuclei ◽  
Lower Energy ◽  
Gamma Ray ◽  
Galactic Nuclei ◽  
Starburst Galaxies ◽  
Gamma Ray Bursts ◽  
Cherenkov Detector ◽  
Extragalactic Background Light ◽  
Background Light ◽  
Water Cherenkov Detector

Abstract Extra-galactic gamma-ray sources, such as gamma-ray bursts, active galactic nuclei, starburst galaxies, are interesting and important targets for LHAASO observations. In this chapter, the prospects of detecting these sources with LHAASO and their physical implications are studied. The upgrade plan for the Water Cherenkov Detector Array (WCDA), which aims to enhance the detectability of relatively lower energy photons, is also presented. In addition, a study on constraining the extragalactic background light with LHAASO observation of blazars is presented.

Perspective of detecting very high energy gamma-ray emission from active galactic nuclei with Large High Altitude Air Shower Observatory (LHAASO)

2016 ◽  
Vol 25 (01) ◽  
pp. 1650006 ◽  
Author(s):  
Yi Zhao ◽  
Qiang Yuan ◽  
Xiao-Jun Bi ◽  
Feng-Rong Zhu ◽  
Huan-Yu Jia
Keyword(s):  
High Altitude ◽  
Active Galactic Nuclei ◽  
Gamma Ray ◽  
Galactic Nuclei ◽  
High Energy ◽  
Large Area ◽  
Extragalactic Background Light ◽  
Air Shower ◽  
Very High Energy ◽  
Very High

The detectability of active galactic nuclei (AGN), a major class of [Formula: see text]-ray emitters in the sky, by the newly planned Chinese project, Large High Altitude Air Shower Observatory (LHAASO), is investigated. The expectation is primarily based on the AGN catalog of Fermi Large Area Telescope (Fermi-LAT), with an extrapolation to the very high energy (VHE) range taking into account the absorption effect by the extragalactic background light (EBL). It is found that LHAASO may have the potential to detect more than several tens of the Fermi detected AGN, basically BL Lacertaes, with one-year sky survey. The capability of measuring the energy spectrum and light curve are also discussed.

INVESTIGATION OF INTRADAY VARIABILITY OF ACTIVE GALACTIC NUCLEI IN OPTICAL AND RADIO RANGES

2010 ◽  
Vol 1 (2) ◽  
pp. 111-115
Author(s):  
O. E. Volvach ◽  
L. N. Volvach ◽  
V. S. Bichkova ◽  
M. S. Kardashev ◽  
M. G. Larionov ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Intraday Variability

Hubble Space Telescopeand Ground‐based Observations of I Zw 1 and MRK 486 and the Variability of Polarization in Radio‐quiet Active Galactic Nuclei

1997 ◽  
Vol 488 (1) ◽  
pp. 202-215 ◽  
Author(s):  
Paul S. Smith ◽  
Gary D. Schmidt ◽  
Richard G. Allen ◽  
Dean C. Hines
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei
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