scholarly journals Instruments optimizations for low energy Gamma-ray detection

2019 ◽  
Vol 209 ◽  
pp. 01044
Author(s):  
Gonzalo Rodriguez ◽  
Aldo Morselli
Keyword(s):  
Energy Range ◽  
Photon Energy ◽  
Chemical Evolution ◽  
Energy Resolution ◽  
Gamma Ray ◽  
Supernova Explosion ◽  
Low Energy ◽  
Previous Generation ◽  
Energy Gamma ◽  
Better Than

There is an experimental gap in the study of the non-thermal universe in the photon energy range from 0.3 to 100 MeV. We have analyzed the performance of a detector with unprecedented sensitivity, angular and energy resolution and combined with polarimetric capability to study of the most powerful Galactic and extragalactic sources and with a line sensitivity in the MeV energy range two orders of magnitude better than previous generation of instruments that can determine the origin of key isotopes fundamental for the understanding of supernova explosion and the chemical evolution of our Galaxy.

scholarly journals Impact of H.E.S.S. Lidar profiles on Crab Nebula data

2019 ◽  
Vol 197 ◽  
pp. 01001 ◽  
Author(s):  
Justine Devin ◽  
Johan Bregeon ◽  
Georges Vasileiadis ◽  
Yves Gallant
Keyword(s):  
Energy Range ◽  
Photon Energy ◽  
Gamma Ray ◽  
Crab Nebula ◽  
Systematic Errors ◽  
High Energy ◽  
Atmospheric Composition ◽  
Direct Impact ◽  
Energy Gamma ◽  
The Crab Nebula

The H.E.S.S. experiment in Namibia is a high-energy gamma-ray telescope sensitive in the energy range from 30 GeV to a several tens of TeV, that uses the atmospheric Cherenkov technique to detect showers developed within the atmosphere. The elastic lidar, installed on the H.E.S.S. site, allows to reduce the systematic errors related to the atmospheric composition uncertainties thanks to the estimation of the extinction profile for the Cherenkov light (300-650 nm). The latter has a direct impact on the reconstructed parameters, such as the photon energy and the source flux. In this paper we report on physics results obtained on the Crab Nebula spectrum using the lidar profiles obtained at the H.E.S.S. site.

C-SPRINT: a prototype Compton camera system for low energy gamma ray imaging

2002 ◽  
Author(s):  
J.W. LeBlanc ◽  
N.H. Clinthorne ◽  
C.-H. Hua ◽  
E. Nygard ◽  
W.L. Rogers ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Low Energy ◽  
Compton Camera ◽  
Camera System ◽  
Gamma Ray Imaging ◽  
Energy Gamma

scholarly journals Constraints on the late X-ray radiation from the low-energy gamma-ray burst of December 3, 2003: INTEGRAL data

2006 ◽  
Vol 32 (5) ◽  
pp. 297-301 ◽  
Author(s):  
S. Yu. Sazonov ◽  
A. A. Lutovinov ◽  
E. M. Churazov ◽  
R. A. Sunyaev
Keyword(s):  
Gamma Ray ◽  
Low Energy ◽  
Gamma Ray Burst ◽  
X Ray ◽  
Energy Gamma ◽  
Integral Data

Observations of the galactic center with the GSFC Low-Energy Gamma-Ray Spectrometer: Preliminary results

1982 ◽  
Author(s):  
W. S. Paciesas ◽  
T. L. Cline ◽  
B. J. Teegarden ◽  
J. Tueller ◽  
P. Durouchoux ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Galactic Center ◽  
Low Energy ◽  
Preliminary Results ◽  
Gamma Ray Spectrometer ◽  
Energy Gamma

scholarly journals Convolutional Neural Networks for Low Energy Gamma-Ray Air Shower Identification with HAWC

2021 ◽  
Author(s):  
Ian Watson ◽  
Anushka Udara Abeysekara ◽  
Andrea Albert ◽  
Ruben Alfaro ◽  
César Alvarez ◽  
...  
Keyword(s):  
Neural Networks ◽  
Convolutional Neural Networks ◽  
Gamma Ray ◽  
Low Energy ◽  
Air Shower ◽  
Energy Gamma

scholarly journals Detection of the Geminga pulsar with MAGIC hints at a power-law tail emission beyond 15 GeV

2020 ◽  
Vol 643 ◽  
pp. L14
Author(s):  
◽  
V. A. Acciari ◽  
S. Ansoldi ◽  
L. A. Antonelli ◽  
A. Arbet Engels ◽  
...  
Keyword(s):  
Energy Range ◽  
Power Law ◽  
Gamma Ray ◽  
Low Energy ◽  
Significance Level ◽  
Inverse Compton Scattering ◽  
Curvature Radiation ◽  
Sensitivity Range ◽  
Inverse Compton ◽  
First Time

We report the detection of pulsed gamma-ray emission from the Geminga pulsar (PSR J0633+1746) between 15 GeV and 75 GeV. This is the first time a middle-aged pulsar has been detected up to these energies. Observations were carried out with the MAGIC telescopes between 2017 and 2019 using the low-energy threshold Sum-Trigger-II system. After quality selection cuts, ∼80 h of observational data were used for this analysis. To compare with the emission at lower energies below the sensitivity range of MAGIC, 11 years of Fermi-LAT data above 100 MeV were also analysed. From the two pulses per rotation seen by Fermi-LAT, only the second one, P2, is detected in the MAGIC energy range, with a significance of 6.3σ. The spectrum measured by MAGIC is well-represented by a simple power law of spectral index Γ = 5.62 ± 0.54, which smoothly extends the Fermi-LAT spectrum. A joint fit to MAGIC and Fermi-LAT data rules out the existence of a sub-exponential cut-off in the combined energy range at the 3.6σ significance level. The power-law tail emission detected by MAGIC is interpreted as the transition from curvature radiation to Inverse Compton Scattering of particles accelerated in the northern outer gap.

Low Energy Gamma Ray Imager (LEGRI)

1995 ◽  
pp. 183-187 ◽  
Author(s):  
F. Ballesteros ◽  
G. Bernabeu ◽  
A. Giménez ◽  
J. Fabregat ◽  
F. Pérez ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Low Energy ◽  
Energy Gamma
Sign in / Sign up

Export Citation Format

Share Document