Results 21 to 30 of about 3,889,913 (343)

Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A [PDF]

open access: yes, 2017
On 2017 August 17, the gravitational-wave event GW170817 was observed by the Advanced LIGO and Virgo detectors, and the gamma-ray burst (GRB) GRB 170817A was observed independently by the Fermi Gamma-ray Burst Monitor, and the Anticoincidence Shield for ...
B. Abbott   +499 more
semanticscholar   +1 more source

Indirect dark matter searches in gamma and cosmic rays [PDF]

open access: yesNature Physics, 2017
Dark matter candidates such as weakly interacting massive particles are predicted to annihilate or decay into Standard Model particles, leaving behind distinctive signatures in gamma rays, neutrinos, positrons, antiprotons, or even antinuclei.
J. Conrad, O. Reimer
semanticscholar   +1 more source

On the origin of gamma-rays in Fermi blazars: beyondthe broad-line region [PDF]

open access: yes, 2018
The gamma-ray emission in broad-line blazars is generally explained as inverse Compton (IC) radiation of relativistic electrons in the jet scattering optical-UV photons from the Broad Line Region (BLR), the so-called BLR External Compton scenario.
L. Costamante   +6 more
semanticscholar   +1 more source

The ALPACA experiment: The project of the first sub-PeV gamma-ray observation in the southern sky

open access: yesSciPost Physics Proceedings, 2023
The ALPACA experiment is a project aiming to observe sub-PeV gamma rays for the first time in the southern hemisphere. The main goal of ALPACA is to identify PeVatrons, the accelerators of Galactic PeV cosmic rays, by observing sub-PeV pion-decay gamma ...
Teruyoshi Kawashima for the ALPACA Collaboration
doaj   +1 more source

GAMMA-RAYS FROM THE QUASAR PKS 1441+25: STORY OF AN ESCAPE [PDF]

open access: yes, 2015
Outbursts from gamma-ray quasars provide insights on the relativistic jets of active galactic nuclei and constraints on the diffuse radiation fields that fill the universe.
A. Abeysekara   +105 more
semanticscholar   +1 more source

Assessment of mutagenic sensitivity in blackgram variety CO 6

open access: yesElectronic Journal of Plant Breeding, 2021
The present study was conducted to examine the mutagenic effect of 60Co gamma rays and a combination of 60Co gamma rays with EMS in blackgram variety CO 6. Based on the LD50 dose, the seeds were treated with three different doses of gamma rays (200, 300,
M. Tamilzharasi1, D. Kumaresan1*, V. Thiruvengadam2, J. Souframanian3 and P. Jayamani4
doaj   +1 more source

The Neutron-Gamma Pulse Shape Discrimination of CLLB Detector [PDF]

open access: yesEPJ Web of Conferences
Cs2LiLaBr6: Ce (CLLB) scintillator with the size of Φ 21mm × 25 mm coupled with PMT was used to detect neutron and gamma rays. The pulse shape discrimination (PSD) of neutrons and gamma rays by charge comparison method, the neutrons and gamma rays from ...
Song Ruiqiang   +6 more
doaj   +1 more source

SN2014J gamma rays from the 56Ni decay chain [PDF]

open access: yes, 2014
R. Diehl, et al., “SN2014J gamma rays from the 56Ni decay chain”, Astronomy & Astrophysics, Vol. 574, January 2015. The version of record is available online at: https://www.aanda.org/articles/aa/abs/2015/02/aa24991-14/aa24991-14.html Reproduced with ...
R. Diehl   +9 more
semanticscholar   +1 more source

Hadronic gamma-rays from RX J1713.7−3946? [PDF]

open access: yes, 2014
RX J1713.7-3946 is a key object to check the supernova remnant paradigm of the origin of Galactic cosmic rays. While the origin of its gamma{ray emission (hadronic versus leptonic) is still debated, the hard spectrum at GeV energies reported by the Fermi
S. Gabici, F. Aharonian
semanticscholar   +1 more source

Multiple-Collision Free-Electron Laser Compton Backscattering for a High-Yield Gamma-Ray Source

open access: yesApplied Sciences, 2020
We observed multiple-collision free-electron laser (FEL)-Compton backscattering in which a multi-bunch electron beam makes head-on collisions with multi-pulse FELs in an optical cavity, using an infrared FEL system in the storage ring NIJI-IV.
Norihiro Sei, Hiroshi Ogawa, QiKa Jia
doaj   +1 more source

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