Results 31 to 40 of about 309 (157)
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +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
doaj +1 more source
Jet Physics of Accreting Super-Massive Black Holes in the Era of the Fermi Gamma-ray Space Telescope
Frontiers in Astronomy and Space Sciences, 2017 The Fermi Gamma-ray Space Telescope with its main instrument on-board, the Large Area Telescope (LAT), opened a new era in the study of high-energy emission from Active Galactic Nuclei (AGN).
Filippo D'Ammando, Filippo D'Ammando
doaj +1 more source
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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Searching for the most distant blazars with the Fermi Gamma-ray Space Telescope [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 We investigate the prospects for discovering blazars at very high-redshifts (z>3-6) with the Fermi Gamma-Ray Space Telescope (Fermi), employing a model for the evolving gamma-ray luminosity function (GLF) of the blazar population. Our previous GLF model is used as a basis, which features luminosity-dependent density evolution implied from X-ray data
Yoshiyuki Inoue +5 more
openaire +4 more sources
Dark Matter Signals in the gamma-ray sky
EPJ Web of Conferences, 2014 Detection of gamma rays and cosmic rays from the annihilation or decay of dark matter particles is a promising method for identifying dark matter, understanding its intrinsic properties, and mapping its distribution in the universe.
Morselli Aldo
doaj +1 more source
Poisson denoising on the sphere: application to theFermigamma ray space telescope [PDF]
Astronomy and Astrophysics, 2010 16 pages, 8 ...
Schmitt, J. +4 more
openaire +4 more sources