Results 41 to 50 of about 990 (196)

Lorentz Invariance Violation from Gamma-Ray Bursts

The Astrophysical Journal
Lorentz invariance violation (LV) is examined through the time delay between high-energy and low-energy photons in gamma-ray bursts (GRBs). Previous studies determined the LV energy scale as E _LV ≃ 3.60 × 10 ^17 GeV using Fermi Gamma-ray Space Telescope
Hanlin Song, Bo-Qiang Ma
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Intensity interferometry with the MAGIC telescopes

, 2022
PoS: Proceedings of Science ...
MAGIC Collaboration, Delgado, Carlos, Acciari, Victor A., Colombo, Eduardo, Cortina, Juan, Diaz Ginzo, Carlos, Fink, David, Fiori, Michele, Hassan, Tarek, Jiménez Martínez, Irene, Lyard, Étienne, Mangano, Salvatore, Mirzoyan, Razmik, Naletto, Giampiero, Njoh Ekoume, Theodore R., Polo Rodriguez, Miguel, Produit, Nicolas, Rodriguez Vazquez, Juan Jose, Schweizer, Thomas, Walter, Roland, Wunderlich, Carolin, Zampieri, Luca, Arbet Engels, Axel, Biland, Adrian, et al.   +24 more
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Small telescopes being effective: MAGIC or not?

RAS Techniques and Instruments, 2023
Abstract The paper describes the MAGIC multimode focal reducer (Monitoring of Active Galaxies by Investigation of their Cores), commissioned on the 1-m Zeiss-1000 telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences in 2020 September.
Victor L Afanasiev, Eugene A Malygin, Elena S Shablovinskaya, Roman I Uklein, Vladimir R Amirkhanyan, Alexander E Perepelitsyn, Irina V Afanasieva   +6 more
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Sub-GeV Gamma Rays from Nearby Seyfert Galaxies and Implications for Coronal Neutrino Emission

The Astrophysical Journal Letters
Recent observations of high-energy neutrinos by IceCube and gamma rays by the Fermi Large Area Telescope (LAT) and the MAGIC telescope have suggested that neutrinos are produced in gamma-ray opaque environments in the vicinity of supermassive black holes.
Kohta Murase, Christopher M. Karwin, Shigeo S. Kimura, Marco Ajello, Sara Buson   +4 more
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Cloud Detection and Prediction with All Sky Cameras

EPJ Web of Conferences, 2017
Atmospheric monitoring is a field of special importance for astroparticle physics, especially for Imaging Atmospheric Cherenkov Telescopes (IACTs) as clouds will absorb and scatter the Cherenkov photons of air showers.
Adam Jan, Buss Jens, Brügge Kai, Nöthe Max, Rhode Wolfgang   +4 more
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Status and results of the MAGIC telescope [PDF]

Journal of Physics: Conference Series, 2008
The MAGIC telescope is an imaging air Cherenkov telescope for very high energy gamma-ray astronomy. The scientific outcome of MAGIC at the end of its second cycle of observations includes outstanding results in both galactic and extragalactic physics. Among them the observation of periodic gamma-ray emission from the galactic binary system LSI+61, an ...
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3C 84: Observational Evidence for Precession and a Possible Relation to TeV Emission

Galaxies, 2019
3C 84 (NGC 1275, Perseus A) is a bright radio source at the center of an ongoing merger, where HST observations show two colliding spiral galaxies. 3C 84 holds promise to improve our understanding about how of the activity of active galactic nuclei, the ...
Silke Britzen, Christian Fendt, Michal Zajaček, Frédéric Jaron, Ilya Pashchenko, Margo F. Aller, Hugh D. Aller   +6 more
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Recent Results from the MAGIC Telescopes [PDF]

, 2012
Proceedings of the 13th ICATPP Conference on Astroparticle, Particle, Space Physics and Detectors for Physics ...
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The relation between evaluative stances and narratological elements in an audio description script for theatre

TradTerm, 2020
The question of neutrality in audio description (AD) has been discussed by professionals and researchers. Following several studies started by Praxedes Filho and Magalhães (2013, 2015), this article analyzes if evaluative stances identified via the ...
Janaína Vieira Taillade Abud, Vera Lúcia Santiago Araújo   +1 more
doaj  

Identification of High Energy Gamma Particles From the Cherenkov Gamma Telescope Data Using a Deep Learning Approach

IEEE Access
Atmospheric Cherenkov telescopes have enabled recent breakthroughs in gamma-ray astronomy, enabling the study of high-energy gamma particles in over 90 galactic and extragalactic regions.
K. Karthick, S. Akila Agnes, S. Sendil Kumar, Sultan Alfarhood, Mejdl Safran   +4 more
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