NEW FERMI-LAT EVENT RECONSTRUCTION REVEALS MORE HIGH-ENERGY GAMMA RAYS FROM GAMMA-RAY BURSTS [PDF]
, 2013 Based on the experience gained during the four and a half years of the mission, the Fermi-LAT Collaboration has undertaken a comprehensive revision of the event-level analysis going under the name of Pass 8.
W. Atwood +18 more
semanticscholar +1 more source
AMEGO-X: MeV gamma-ray Astronomy in the Multi-messenger Era [PDF]
International Conference on Rebooting Computing, 2021 Recent detections of gravitational wave signals and neutrinos from gamma-ray sources have ushered in the era of multi-messenger astronomy, while highlighting the importance of gammaray observations for this emerging field.
H. Fleischhack
semanticscholar +1 more source
Dense electron-positron plasmas and bursts of gamma-rays from laser-generated quantum electrodynamic plasmas [PDF]
, 2013 In simulations of a 12.5 PW laser (focussed intensity I=4×1023Wcm−2) striking a solid aluminum target, 10% of the laser energy is converted to gamma-rays.
C. Ridgers +6 more
semanticscholar +1 more source
Scientific Reports, 2021 Multi-tracer imaging can provide useful information in the definitive diagnosis and research of medical, biological, and pharmaceutical sciences. Single-photon emission computed tomography (SPECT) is one of the nuclear medicine imaging modalities widely ...
Mizuki Uenomachi +3 more
doaj +1 more source
Multi-frequency, Multi-Epoch Study of Mrk 501: Hints for a two-component nature of the emission [PDF]
, 2015 Since the detection of very high energy (VHE) $\gamma$-rays from Mrk 501, its broad band emission of radiation was mostly and quite effectively modeled using one zone emission scenario.
Acharya, B. S. +10 more
core +2 more sources
Analyzing {\gamma}-rays of the Galactic Center with Deep Learning [PDF]
, 2018 We present a new method to interpret the $\gamma$-ray data of our inner Galaxy as measured by the Fermi Large Area Telescope (Fermi LAT). We train and test convolutional neural networks with simulated Fermi-LAT images based on models tuned to real data ...
Caron, Sascha +3 more
core +3 more sources
Transparency of the Universe to gamma-rays [PDF]
, 2013 Using the most recent observational data concerning the Extragalactic Background Light and the Radio Background, for a source at a redshift z_s < 3 we compute the energy E_0 of an observed gamma-ray photon in the range 10 GeV < E_0 < 10^13 GeV such that ...
A. Angelis, G. Galanti, M. Roncadelli
semanticscholar +1 more source
Absorption of High Energy Gamma Rays by Interactions with Extragalactic Starlight Photons at High Redshifts [PDF]
, 1997 We extend earlier calculations of the attenuation suffered by gamma rays during their propagation from extragalactic sources, obtaining new extinction curves for gamma rays down to 10 GeV in energy, from sources up to a redshift of z=3.Comment: 5 pages ...
Salamon, M. H., Stecker, F. W.
core +2 more sources
New applications and developments in the neutron shielding
EPJ Web of Conferences, 2017 Shielding neutrons involve three steps that are slowing neutrons, absorption of neutrons, and impregnation of gamma rays. Neutrons slow down with thermal energy by hydrogen, water, paraffin, plastic. Hydrogenated materials are also very effective for the
Uğur Fatma Aysun
doaj +1 more source
Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth [PDF]
Science, 2017 Exotic origin for cosmic positrons Several cosmic-ray detectors have found more positrons arriving at Earth than expected. Some researchers interpret this as a signature of exotic physics, such as the annihilation of dark matter particles.
A. Abeysekara +115 more
semanticscholar +1 more source