Development and performance test of a prototype air shower array for search for gamma ray point sources in the very high energy region

1990 ◽  
Vol 288 (2-3) ◽  
pp. 619-631 ◽  
Author(s):  
M. Amenomori ◽  
H. Nanjo ◽  
N. Hotta ◽  
I. Ohta ◽  
K. Kasahara ◽  
...  
Keyword(s):  
Performance Test ◽  
Gamma Ray ◽  
High Energy ◽  
Point Sources ◽  
High Energy Region ◽  
Air Shower ◽  
Very High Energy ◽  
And Performance ◽  
Shower Array ◽  
Very High

High energy y-rays from the direction of the Crab pulsar

1981 ◽  
Vol 301 (1462) ◽  
pp. 641-644 ◽  
Keyword(s):  
High Energy ◽  
Point Sources ◽  
Crab Pulsar ◽  
Muon Detector ◽  
Air Showers ◽  
Extensive Air Shower ◽  
Air Shower ◽  
Very High Energy ◽  
Shower Array ◽  
Very High

An attempt is being made to extend the search for high energy y-rays from point sources to much higher energies by using the method based on investigation of the muon-poor extensive air showers. A search has been made for very high energy photons from the direction of the Crab pulsar (the best known high energy y-ray source) by using the Lodz extensive air shower array. The 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.

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.

Gamma-Ray Astronomy at the Highest Energies

1986 ◽  
Vol 6 (3) ◽  
pp. 280-289 ◽  
Author(s):  
R.J. Protheroe
Keyword(s):  
Cosmic Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Gamma Ray Astronomy ◽  
Air Shower ◽  
Very High Energy ◽  
Observational Techniques ◽  
Very High ◽  
Geographical Locations

AbstractIn 1983 ultra high energy γ-rays were detected from Cygnus X-3. This was of particular interest since it is the first identifiable source of cosmic rays. Since then, there has been an explosion of interest in the field with more than twenty air shower arrays planned or being used to search for γ-rays at energies above 1014 eV. Observational techniques for both very high energy and ultra high energy γ-ray astronomy are described and existing and proposed experiments reviewed with particular reference to their geographical locations. The results obtained so far are summarised together with some of the models proposed to explain them.

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.

scholarly journals Comparison of the Measurement and Simulation with KM2A Prototype Array

2019 ◽  
Vol 208 ◽  
pp. 14006
Author(s):  
Zhe Li ◽  
Songzhan Chen ◽  
Huihai He ◽  
Cong Li ◽  
Hongkui Lv ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Cosmic Ray ◽  
High Energy ◽  
Stable Operation ◽  
Air Shower ◽  
Very High Energy ◽  
Energy Gamma ◽  
Many Sources ◽  
Very High ◽  
Monte Carlo Simulation Program

The Large High Altitude Air Shower Observatory (LHAASO) is a new hybrid array for very high energy gamma ray astronomy and cosmic ray physics. The KM2A array, one of the main parts of LHAASO, covers an area of 1.3 km2 to observe gamma rays above 10 TeV up to 1 PeV for many sources. A prototype with 1% the size of the whole KM2A has been in stable operation for more than two years. A Monte Carlo simulation program named G4KM2A was developed; based on this work, the trigger rate, hit multiplicity, angular and core reconstruction are compared with KM2A prototype data. Finally, the moon shadow with -6.5 significance was obtained. The G4KM2A simulation results are consistent with KM2A prototype data and can be used for the whole KM2A array in future.

scholarly journals Upper Limits on Gamma-ray Emission from Supernovae Serendipitously Observed with H.E.S.S.

2017 ◽  
Vol 12 (S331) ◽  
pp. 325-328 ◽  
Author(s):  
Rachel Simoni ◽  
Nigel Maxted ◽  
Mathieu Renaud ◽  
Jacco Vink
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Air Shower ◽  
Upper Limits ◽  
Very High Energy ◽  
Nearby Galaxies ◽  
Gamma Ray Emission ◽  
High Energy Emission ◽  
By Products ◽  
Very High

AbstractIt is hypothesized that some young supernovae might have the correct properties to accelerate cosmic rays, which in turn might generate gamma-ray emission by-products. We search for gamma-ray excesses towards supernovae in nearby galaxies which were serendipitously within the field of view of the HESS telescopes within a year of the supernova event. HESS cherenkov air-shower data collected between December 2003 and March 2015 were considered and compared to recent catalogs. Nine candidate supernovae were identified and analysed. No significant emission from these supernovae has been found, and upper limits for their very high energy emission are reported.

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 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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