scholarly journals Search for 10 TeV Gamma-Rays from the Nearby AGNs with the Tibet Air Shower Array

1998 ◽  
Vol 188 ◽  
pp. 440-441
Author(s):  
L.K. Ding ◽  
T. Kobayashi ◽  
K. Mizutani ◽  
A. Shiomi ◽  
Y.H. Tan ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Galactic Nuclei ◽  
High Energy ◽  
Bl Lac Objects ◽  
Air Shower ◽  
Very High Energy ◽  
Tev Gamma Rays ◽  
Shower Array ◽  
Air Shower Array

The detection by EGRET of gamma-rays from more than 50 active galactic nuclei (AGNs) allowed us to expect these objects to be the sources of extragalactic cosmic rays at very high energy. The TeV gamma-rays from nearby BL Lac objects of the AGNs examined were detected by the Whipple Observatory collaboration. In this paper, we present the results given by the Tibet air shower array on the search for 10 TeV gamma-ray emission from 18 relatively nearby AGNs with redshifts of z < 0.07.

scholarly journals High Energy γ-Rays from the Direction of the Crab Pulsar

1981 ◽  
Vol 94 ◽  
pp. 327-328
Author(s):  
T. Dzikowski ◽  
B. Grochalska ◽  
J. Gawin ◽  
J. Wdowczyk
Keyword(s):  
High Energy ◽  
Crab Pulsar ◽  
Muon Detector ◽  
Extensive Air Shower ◽  
Air Shower ◽  
Very High Energy ◽  
Γ Rays ◽  
Shower Array ◽  
Very High ◽  
Air Shower Array

A search has been made for very high energy photons from the direction of the Crab Pulsar using the Lodz extensive air shower array. This device is particularly suitable for such a study because it consists of a large muon detector which can be used to search for the characteristic muon poor showers.

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.

Search for steady emission of 10-TeV gamma rays from the Crab Nebula, Cygnus X-3, and Hercules X-1 using the Tibet air shower array

1992 ◽  
Vol 69 (17) ◽  
pp. 2468-2471 ◽  
Author(s):  
M. Amenomori ◽  
Z. Cao ◽  
L. K. Ding ◽  
Z. Y. Feng ◽  
K. Hibino ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Crab Nebula ◽  
Air Shower ◽  
Tev Gamma Rays ◽  
The Crab Nebula ◽  
Shower Array ◽  
Air Shower Array

scholarly journals Search for astrophysical PeV gamma rays from point sources with Carpet-2

2019 ◽  
Vol 207 ◽  
pp. 03004 ◽  
Author(s):  
D. D. Dzhappuev ◽  
I. M. Dzaparova ◽  
E. A. Gorbacheva ◽  
I. S. Karpikov ◽  
M. M. Khadzhiev ◽  
...  
Keyword(s):  
Gamma Rays ◽  
High Energy ◽  
Point Sources ◽  
Muon Detector ◽  
Air Shower ◽  
Early Results ◽  
Upper Limits ◽  
Shower Array ◽  
Air Shower Array

Early results of the search for Eγ > 1 PeV cosmic photons from point sources with the data of Carpet–2, an air-shower array equipped with a 175 m2 muon detector, are presented. They include 95% CL upper limits on PeV photon fluxes from stacked directions of high-energy IceCube neutrino events and from four predefined sources, Crab, Cyg X-3, Mrk 421 and Mrk 501. An insignificant excess of events from Mrk 421 will be further monitored. Prospects of the use of the upgraded installation, Carpet–3 (410 m2 muon detector), scheduled to start data taking in 2019, for searches of Eγ > 100 TeV photons, are briefly discussed.

Search for 10 TeV Gamma-Rays from the Nearby AGNs with the Tibet Air Shower Array

1998 ◽  
pp. 440-441
Author(s):  
L. K. Ding ◽  
T. Kobayashi ◽  
K. Mizutani ◽  
A. Shiomi ◽  
Y. H. Tan ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Air Shower ◽  
Tev Gamma Rays ◽  
Shower Array ◽  
Air Shower Array

scholarly journals Very high energy neutrino expectation from Fanaroff-Riley I sources

2014 ◽  
Vol 10 (S313) ◽  
pp. 169-174
Author(s):  
Antonio Marinelli ◽  
Nissim Fraija
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Event Rate ◽  
High Energy ◽  
Spectral Energy ◽  
Energy Distributions ◽  
Very High Energy ◽  
Tev Gamma Rays ◽  
Very High ◽  
Centaurus A

AbstractFanaroff-Riley I radiogalaxies have been observed in TeV gamma-rays during the last decades. The origin of the emission processes related with this energy band is still under debate. Here we consider the case of the two closest Fanaroff-Riley I objects: Centaurus A and M87. Their entire broadband spectral energy distributions and variability fluxes show evidences that leptonic models are not sufficient to explain their fluxes above 100 GeV. Indeed, both objects have been imaged by LAT instrument aboard of Fermi telescope with measured spectra well connected with one-zone leptonic models. However, to explain the TeV spectra obtained with campaigns by H.E.S.S., for Centaurus A, and by VERITAS, MAGIC and H.E.S.S. for M87, different emission processes must be introduced. In this work we introduce hadronic scenarios to describe the TeV gamma-ray fluxes observed and to obtain the expected neutrino counterparts for each considered TeV campaign. With the obtained neutrino spectra we calculate, through Monte Carlo simulations, the expected neutrino event rate in a hypothetical Km3 neutrino telescope and we compare the results with what has been observed by IceCube experiment up to now.

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.

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