Results 51 to 60 of about 88,325 (210)

Molecular shocks and the gamma-ray clouds of the W28 supernova remnant

open access: yes, 2017
Interstellar medium clouds in the W28 region are emitting gamma-rays and it is likely that the W28 supernova remnant is responsible, making W28 a prime candidate for the study of cosmic-ray acceleration and diffusion.
Kawamura, Akiko   +15 more
core   +1 more source

The extragalactic gamma-ray sky: A view on the most powerful phenomena in the universe

open access: yesMètode 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

Gamma ray Cerenkov telescope image analysis [PDF]

open access: yes, 1997
The subject of this thesis is ground based gamma ray astronomy using the imaging atmospheric Cerenkov technique. The first two chapters are introductory, and describe the field of gamma ray astronomy, the generation of extensive air showers in the ...
Holder, J., Holder, Jamie
core  

The effects of atmosphere conditions on gamma-ray astronomy [PDF]

open access: yes, 2005
The High Energetic Stereoscopic System (H.E.S.S.) experiment is an array of imaging atmospheric Cherenkov (IAC) telescopes of the next generation, with enlarged mirrors and advanced detector electronics compared to its predecessors.
Aye, Klaus-Michael
core  

TeV Analysis of a Source-rich Region with the HAWC Observatory: Is HESS J1809-193 a Potential Hadronic PeVatron?

open access: yesThe Astrophysical Journal
HESS J1809-193 is an unidentified TeV source, first detected by the High Energy Stereoscopic System (H.E.S.S.) collaboration. The emission originates in a source-rich region that includes several supernova remnants (SNRs) and pulsars including SNR G11.1 ...
A. Albert   +82 more
doaj   +1 more source

Identification and Analyses in Optical Light of Gamma-Ray Sources with Astronomical Archival Plates

open access: yesAdvances in Astronomy, 2010
The ESA INTEGRAL satellite (International Gamma Ray Laboratory) launched in October 2002 continues to deliver valuable data about the gamma-ray sky. Nearly 450 gamma-ray sources have been detected so far mainly by the IBIS onboard instrument, and others ...
René Hudec, Miloš Klíma
doaj   +1 more source

External Inverse-compton and Proton Synchrotron Emission from the Reverse Shock as the Origin of VHE Gamma Rays from the Hyper-bright GRB 221009A

open access: yesThe 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
doaj   +1 more source

The Magellanic Clouds as the source of gamma-ray bursters [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1993
We present a new model for gamma-ray bursts to explain their isotropic but inhomogeneous space distribution. We propose that the Magellanic Clouds are the source of a special population of gamma-ray-bursting pulsars which are easily ejected from the Clouds and lead to a halo distribution which is homogeneous within a radius of ∼ 50 kpc and falls off ...
Fabian, A, Podsiadlowski, P
openaire   +2 more sources

Physics from Time Variability of the VHE Blazar PKS 2155-304 [PDF]

open access: yes, 2010
Blazars are the principal extragalactic sources of very high energy gamma-ray emission in the Universe. These objects constitute a sub-class of Active Galactic Nuclei whose emission is dominated by Doppler boosted non-thermal radiation from plasma ...
BARRES-DE-ALMEIDA, ULISSES
core  

Gamma-ray-selected AGN

open access: yes, 2016
The gamma-ray band is the most energetic part of the electromagnetic spectrum. As such it is also where selection effects are most severe, as it can only be reached by the most extreme non-thermal AGN.
Giommi, Paolo, Giommi, Paolo (5268868)
core   +1 more source

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