scholarly journals Probing Gamma-Ray Burst VHE Emission with the Southern Wide-Field-of-View Gamma-Ray Observatory

Galaxies ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 98
Author(s):  
Giovanni La Mura ◽  
Ulisses Barres de Almeida ◽  
Ruben Conceição ◽  
Alessandro De Angelis ◽  
Francesco Longo ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Lorentz Invariance ◽  
High Energy ◽  
Field Of View ◽  
Wide Field ◽  
Radiation Emission ◽  
Gamma Ray Burst ◽  
Cherenkov Telescopes ◽  
Cherenkov Telescope ◽  
Wide Field Of View

Recent observations have confirmed that Gamma-Ray Burst (GRB) afterglows produce Very High-Energy radiation (VHE, E>100GeV). This highly anticipated discovery opens new scenarios in the interpretation of GRBs and in their role as probes of Extragalactic Background Light (EBL) and Lorentz Invariance Violation (LIV). However, some fundamental questions about the actual nature of VHE emission in GRBs and its evolution during the burst are still unsolved. These questions will be difficult to address, even with future imaging Cherenkov telescopes, such as the Cherenkov Telescope Array (CTA). Here we investigate the prospects of gamma-ray sky monitoring with Extensive Air Showers arrays (EAS) to address these problems. We discuss the theoretical aspects connected with VHE radiation emission and the implications that its temporal evolution properties have on the interpretation of GRBs. By revisiting the high-energy properties of some Fermi-LAT detected GRBs, we estimate the typical fluxes expected in the VHE band and compare them with a range of foreseeable instrument performances, based on the Southern Wide Field-of-view Gamma-ray Observatory concept (SWGO). We focus our analysis on how different instrument capabilities affect the chances to explore the burst onset and early evolution in VHE, providing invaluable complementary information with respect to Cherenkov telescope observations. We show that under the assumption of conditions already observed in historical events, the next-generation ground monitoring detectors can actually contribute to answer several key questions.

scholarly journals Monitoring Gamma-Ray Burst VHE emission with the Southern Wide-field-of-view Gamma-ray Observatory

2021 ◽  
Author(s):  
Giovanni La Mura ◽  
Ulisses Barres de Almeida ◽  
Rúben Conceição ◽  
Alessandro De Angelis ◽  
Francesco Longo ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Field Of View ◽  
Wide Field ◽  
Gamma Ray Burst ◽  
Wide Field Of View

scholarly journals On the scientific motivation for a wide field-of-view TeV gamma-ray observatory in the Southern Hemisphere

2017 ◽  
Author(s):  
Miguel Mostafa ◽  
Segev BenZvi ◽  
Harm Schoorlemmer ◽  
Fabian Schüssler ◽  
Keyword(s):  
Southern Hemisphere ◽  
Gamma Ray ◽  
Field Of View ◽  
Wide Field ◽  
Wide Field Of View

scholarly journals First detection of the Crab Nebula at TeV energies with a Cherenkov telescope in a dual-mirror Schwarzschild-Couder configuration: the ASTRI-Horn telescope

2020 ◽  
Vol 634 ◽  
pp. A22 ◽  
Author(s):  
S. Lombardi ◽  
O. Catalano ◽  
S. Scuderi ◽  
L. A. Antonelli ◽  
G. Pareschi ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Crab Nebula ◽  
Statistical Significance ◽  
High Energy ◽  
Field Of View ◽  
Large Field ◽  
Mirror Reflection ◽  
Camera System ◽  
Cherenkov Telescope ◽  
The Crab Nebula

We report on the first detection of very high-energy gamma-ray emission from the Crab Nebula by a Cherenkov telescope in dual-mirror Schwarzschild-Couder (SC) configuration. This result has been achieved by means of the 4 m ASTRI-Horn telescope, operated on Mt. Etna, Italy, and developed in the context of the Cherenkov Telescope Array Observatory preparatory phase. The dual-mirror SC design is aplanatic and characterized by a small plate scale, which allows us to implement large cameras with a large field of view, with small-size pixel sensors and a high level of compactness. The curved focal plane of the ASTRI camera is covered by silicon photo-multipliers, managed by an unconventional front-end electronic system that is based on a customized peak-sensing detector mode. The system includes internal and external calibration systems, hardware and software for control and acquisition, and the complete data archiving and processing chain. These observations of the Crab Nebula were carried out in December 2018 during the telescope verification phase for a total observation time (after data selection) of 24.4 h, equally divided between on- and off-axis source exposure. The camera system was still under commission and its functionality was not yet completely exploited. Furthermore, due to recent eruptions of the Etna Volcano, the mirror reflection efficiency was reduced. Nevertheless, the observations led to the detection of the source with a statistical significance of 5.4σ above an energy threshold of ∼3 TeV. This result provides an important step toward the use of dual-mirror systems in Cherenkov gamma-ray astronomy. A pathfinder mini-array based on nine ASTRI-like telescopes with a large field-of-view is in the course of implementation.

scholarly journals Very Wide-Field Monitoring of the Sky

1994 ◽  
Vol 161 ◽  
pp. 23-27
Author(s):  
R. Hudec ◽  
J. Soldán
Keyword(s):  
Gamma Ray ◽  
Field Monitoring ◽  
Field Of View ◽  
Wide Field ◽  
Gamma Ray Burst ◽  
Optical Transients ◽  
Astronomy And Astrophysics

There is a need for very wide-field monitoring of the sky in several branches of astronomy and astrophysics, ranging from meteor research to monitoring of optical transients and counterparts to gamma ray burst sources. The photographic very wide-field monitoring of the sky is run at the Ondřejov Observatory and other stations of the Czech Meteor Network and is sensitive enough to record stars up to 11 mag on 3–4 h exposures or 1-s flashes up to 3.0 mag over a field-of-view of 180 deg. diameter. A CCD device for very wide-field monitoring is also in development with sensitivity of 5.0 mag for 1-s flashes (and 10 mag for stars with 100 s exposure) over a field-of-view of 50 × 60 degrees. Both systems are briefly described and discussed.

scholarly journals The Science Case for a Southern Wide Field of View Detector

2019 ◽  
Vol 209 ◽  
pp. 01035
Author(s):  
Di Sciascio Giuseppe
Keyword(s):  
Galactic Nuclei ◽  
Field Of View ◽  
Wide Field ◽  
Cherenkov Telescopes ◽  
Wide Field Of View ◽  
Scientific Potential ◽  
Energy Domain ◽  
Survey Instruments ◽  
Extended Sources ◽  
Galactic Sources

EAS arrays are survey instruments able to monitor continuously all the overhead sky. Their sensitivity in the sub-TeV/TeV energy domain cannot compete with that of Cherenkov telescopes, but the wide field of view (about 2 sr) is ideal to complement directional detectors by performing unbiased sky surveys, by monitoring variable or flaring sources such as Active Galactic Nuclei (AGN) and to discover transients or explosive events (GRBs). Arrays are well suited to study extended sources, such as the Galactic diffuse emission, and to measure the spectra of Galactic sources at the highest energies (near or beyond 100 TeV). An EAS array is able to detect at the same time events induced by photons and charged cosmic rays, thus studying the connection between these two messengers of the non-thermal Universe. Therefore, these detectors are, by definition, multi-messenger instruments. All EAS arrays presently in operation or under installation are located in the Northern hemisphere. The scientific potential of a next-generation survey instrument in the Southern Hemisphere will be presented and briefly discussed.

scholarly journals A 15° wide field of view imaging air Cherenkov telescope

2009 ◽  
Vol 31 (1) ◽  
pp. 1-5 ◽  
Author(s):  
R MIRZOYAN ◽  
M ANDERSEN
Keyword(s):  
Field Of View ◽  
Wide Field ◽  
Cherenkov Telescope ◽  
Wide Field Of View

Remote update solution for LHAASO wide field-of-view Cherenkov telescope array electronic readout system

2020 ◽  
Vol 15 (04) ◽  
pp. T04004-T04004
Author(s):  
Z. Liu ◽  
R. Zhou ◽  
S. Zhang ◽  
J. Zhang ◽  
F. Shen ◽  
...  
Keyword(s):  
Field Of View ◽  
Wide Field ◽  
Readout System ◽  
Telescope Array ◽  
Cherenkov Telescope ◽  
Wide Field Of View
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