Results 21 to 30 of about 74,904 (235)

Gamma-Rays as Probes for the Multi-Dimensionality of Type Ia Supernovae [PDF]

open access: yes, 2001
We present $\gamma $-ray spectra for a set of Type Ia supernovae models. Our study is based on a detailed Monte Carlo transport scheme for both spherical and full 3-D geometries.
Aldering   +27 more
core   +3 more sources

GeV Analysis of Mixed Morphology Supernova Remnants Interacting with Molecular Clouds [PDF]

open access: yes, 2012
The first remnants detected by the Fermi Gamma-ray Space Telescope were of the type of mixed-morphology supernova remnants interacting with molecular clouds.
Ercan, E. Nihal, Ergin, Tülün
core   +2 more sources

Gamma-ray astronomy

open access: yesNuclear Physics News, 2001
This paper summarizes recents results in gamma-ray astronomy, most of which were derived with data from ground-based gamma-ray detectors. Many of the contributions presented at this conference involve multiwavelength studies which combine ground-based gamma-ray measurements with optical data or space-based X-ray and gamma-ray measurements.
  +6 more sources

TeV Instrumentation: Current and Future

open access: yesGalaxies, 2022
During the last 20 years, TeV astronomy has turned from a fledgling field, with only a handful of sources, into a fully-developed astronomy discipline, broadening our knowledge on a variety of types of TeV gamma-ray sources. This progress has been mainly
Julian Sitarek
doaj   +1 more source

Status and recent high light results from the LHAASO experiment [PDF]

open access: yesEPJ Web of Conferences
The Large High Altitude Air Shower Observatory (LHAASO) experiment, fully operational since July 2021, is a cutting-edge facility for detecting cosmic rays and gamma rays across a wide energy range. This paper offers an overview of the current status and
Chen Songzhan
doaj   +1 more source

Gamma ray astronomy above 30 TeV and the IceCube results

open access: yesEPJ Web of Conferences, 2017
The study of the diffuse Galactic gamma ray emission is of fundamental importance to understand the properties of cosmic ray propagation in the Milky Way, and extending the measurements to E ≳ 30 TeV is of great interest.
Vernetto Silvia, Lipari Paolo
doaj   +1 more source

Characteristics of extensive air showers around the energy threshold for ground-particle-based $$\gamma $$ γ -ray observatories

open access: yesEuropean Physical Journal C: Particles and Fields, 2019
Very-high-energy $$\gamma $$ γ -ray astronomy based on the measurement of air shower particles at ground-level has only recently been established as a viable approach, complementing the well established air Cherenkov technique.
Harm Schoorlemmer   +2 more
doaj   +1 more source

Calibration of the CAT Telescope [PDF]

open access: yes, 1999
Due to the lack of test-beams in ground-based gamma-ray astronomy, detector calibration has been a major challenge in this field. However, with the use of Cherenkov ring-images due to cosmic-ray muons and of strong gamma-ray signals, the CAT telescope ...
Piron, Frederic
core   +3 more sources

Episodic gamma-ray and neutrino emission from the low mass X-ray binary GRO J0422+32 [PDF]

open access: yes, 2012
GRO J0422+32 is a member of the class of low-mass X-ray binary (LMXB) sources, discovered during an outburst in 1992. Along the entire episode ($\sim 230$ days) a persistent power-law spectral component extending up to $\sim 1$ MeV was observed.
Paredes, Josep M.   +3 more
core   +2 more sources

Revision of the γ-Ray Emission from SNR CTB 109 with the Fermi Large Area Telescope

open access: yesThe Astrophysical Journal, 2023
CTB 109 is a middle-aged shell-type supernova remnant (SNR) with bright thermal X-ray emission. We reanalyze the GeV γ -ray emission from CTB 109 using 13 yr of Pass 8 data recorded by the Fermi Large Area Telescope.
Yuliang Xin, Qizhen Zhao, Xiaolei Guo
doaj   +1 more source

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