Results 101 to 110 of about 712,854 (335)
Extragalactic Gamma-Ray Sources [PDF]
, 2004 This chapter provides a review of γ-ray sources lying at high Galactic latitudes. Their statistical properties and variability status, as well as studies involving cross correlations with lower frequency catalogs and multiwavelength observations, are summarized. The case for active galactic nuclei is analyzed with special emphasis, since they represent
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Evidence that gamma-ray burst sources repeat [PDF]
Monthly Notices of the Royal Astronomical Society, 1993 We investigate clustering in the angular distribution of the 260 $ $-ray bursts in the publicly available BATSE catalogue, using a nearest neighbour analysis and the measures of burst brightness $B$ and short time scale variability $V$ which we introduced earlier. We find that while all 260 bursts are only modestly clustered (Q-value = $1.8 \times 10^{
Quashnock, J. M., Lamb, D. Q.
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A New Population of Very High Energy Gamma-Ray Sources in the Milky Way [PDF]
Science, 2005 Very high energy γ-rays probe the long-standing mystery of the origin of cosmic rays. Produced in the interactions of accelerated particles in astrophysical objects, they can be used to image cosmic particle accelerators.
F. Aharonian +99 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.The presented study focuses on the fracture behaviour of carbon‐bonded magnesia MgO–C refractories, where environmentally friendly fructose, collagen and lignin serve as temporary binding agents. The partial substitution of the source material with recycled MgO–C reduces the fracture resistance, which can be counteracted by the additional introduction ...
Marc Neumann +6 more
wiley +1 more source
The extragalactic gamma-ray sky: A view on the most powerful phenomena in the universe
Mètode Science Studies Journal: Annual Review, 2017 The gamma-ray sky provides a look into the most energetic and violent processes of the universe. In the last years, gamma-ray satellites are scanning the sky for understanding the physics governing the gamma-ray emission.
Monica Orienti
doaj +1 more source
The Astrophysical Journal Letters, 2023 The detection of the hyper-bright gamma-ray burst (GRB) 221009A enables us to explore the nature of the GRB emission and the origin of very high-energy gamma rays.
B. Theodore Zhang +5 more
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Testing the Hadronuclear Origin of PeV Neutrinos Observed with IceCube
, 2013 We consider implications of the IceCube excess for hadronuclear (pp) scenarios of neutrino sources such as galaxy clusters/groups and star-forming galaxies.
Ahlers, Markus +2 more
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XMM-Newton and ESO observations of the two unidentified gamma-ray sources 3EG J0616-3310 and 3EG J1249-8330 [PDF]
, 2006 The limited angular resolution of gamma-ray telescopes prevents a direct identification of the majority of sources detected so far. This is particularly true for the low latitude, probably galactic, ones only 10 % of which has been identified.
Aharonian +89 more
core +2 more sources
Are gamma-ray bursts the sources of ultra-high energy cosmic rays? [PDF]
, 2014 We reconsider the possibility that gamma-ray bursts (GRBs) are the sources of the ultra-high energy cosmic rays (UHECRs) within the internal shock model, assuming a pure proton composition of the UHECRs.
P. Baerwald +6 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff +9 more
wiley +1 more source