Results 31 to 40 of about 2,024 (209)
Light speed variation from gamma ray bursts: criteria for low energy photons
European Physical Journal C: Particles and Fields, 2018 We examine a method to detect the light speed variation from gamma ray burst data observed by the Fermi Gamma-ray Space Telescope (FGST). We suggest new criteria to determine the characteristic time for low energy photons by the energy curve and the ...
Yue Liu, Bo-Qiang Ma
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A Combined Radio Multi-Survey Catalog of Fermi Unassociated Sources
The Astrophysical Journal, 2023 Approximately one-third of existing γ -ray sources identified by the Fermi Gamma-Ray Space Telescope are considered to be unassociated, with no known counterpart at other frequencies/wavelengths.
S. Bruzewski +2 more
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Spider Invasion Across the Galaxy [PDF]
Journal of Astronomy and Space Sciences, 2014 The nature of the exotic stellar corpses which reincarnate by consuming their companion is reviewed. Apart from sucking life from their partners, they are actually eating the doomed companions away by their deadly and powerful particle/radiation beams.
Chung-Yue Hui
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The VLBA-BU-BLAZAR Multi-Wavelength Monitoring Program
Galaxies, 2016 We describe a multiwavelength program of monitoring of a sample of bright γ-ray blazars, which the Boston University (BU) group has being carrying out since June 2007.
Svetlana Jorstad, Alan Marscher
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Multichannel Poisson denoising and deconvolution on the sphere: application to theFermiGamma-ray Space Telescope [PDF]
Astronomy & Astrophysics, 2012 17 pages, 10 ...
Schmitt, Jérémy +4 more
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Recent Results from the Fermi Gamma-ray Space Telescope [PDF]
Proceedings of 35th International Conference of High Energy Physics — PoS(ICHEP 2010), 2011 The Fermi Gamma-ray Space Telescope, formerly named GLAST, is a mission in low-Earth orbit to observe gamma rays from the cosmos in the broad energy range from 20 MeV to >300 GeV, with supporting observations of gamma-ray bursts from 8 keV to 30 MeV. The telescope far surpasses previous generations in its ability to detect and localize faint gamma-ray ...
openaire +1 more source
3HWC J0631+107/LHAASO J0631+1040: A TeV Halo Powered by the Pulsar J0631+1036?
The Astrophysical Journal, 2023 PSR J0631+1036 is a middle-aged pulsar with properties similar to those of the nearby Geminga pulsar. It is bright in γ -rays, and has been noted as the only source possibly associated with the TeV source 3HWC J0631+107 (also the LHAASO J0631+1040).
Dong Zheng, Zhongxiang Wang, Yi Xing
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Model of gamma sky for the Fermi Gamma-ray Space Telescope (FGST) [PDF]
, 2010 A number of important parameters of cosmic-ray distribution, propagation, and interaction in the Milky Way can be predicted through the comparison of measured cosmic-ray and gamma-ray spectra to the spectra of simulated Galaxies. These predictions are made by altering the physical parameters governing Galaxy simulations until a best-fit set of ...
McLeod, Andrew +3 more
openaire +2 more sources
Progress in Multi-wavelength and Multi-Messenger Observations of Blazars and Theoretical Challenges
Galaxies, 2019 This review provides an overview of recent advances in multi-wavelength and multi-messenger observations of blazars, the current status of theoretical models for blazar emission, and prospects for future facilities.
Markus Böttcher
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The Source Brightness Distribution of Terrestrial Gamma‐Ray Flashes From the ALOFT Flight Campaign
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 6, 28 March 2026.Abstract Terrestrial Gamma‐ray Flashes (TGFs) are naturally occurring phenomena that consist of bursts of gamma radiation associated with thunderclouds. Measurements of TGFs have been predominantly based on satellite instruments due to the significantly larger observation area compared to ground measurements. Due to atmospheric attenuation of the gamma
A. N. Fuglestad +15 more
wiley +1 more source