Results 11 to 20 of about 88,325 (210)
Unidentifed gamma-ray sources: hunting gamma-ray blazars
, 2012 24 pages, 4 figures, Accepted for publication on the Astrophysical ...
Massaro, F. +4 more
openaire +4 more sources
Microquasars and Gamma-ray Sources [PDF]
Chinese Journal of Astronomy and Astrophysics, 2005 Microquasars are X-ray binary systems with non-thermal radio emission originated in jet-like features. They are attractive sites for gamma-ray production, since relativistic particles in the jet should traverse locally strong both photon and matter fields.
Romero, Gustavo Esteban
openaire +5 more sources
AIP Conference Proceedings, 2000 We report on the preliminary extension of our work on cataloging the GeV sky to approximately 7 years of CGRO/EGRET observations with special emphasis on a search for transient sources. The search method and significance levels are presented. Our initial results on 13 possible transients indicate that 3 may be new gamma-ray sources.
Lamb, R. C., Macomb, D. J.
openaire +3 more sources
Variability in gamma-ray sources
, 2019 Gamma-rays are known to be emitted from some of the most extreme sources in the known Universe. Many of these objects are volatile and variable, and understanding them is the focus of the work contained in this thesis. One such class of objects which are highly variable in gamma-rays are blazars, which are known to be variable on $\sim$ minute ...
Morris, Paul Joseph, Paul Joseph Morris
openaire +4 more sources
Two Candidate Pulsar TeV Halos Identified from Property-similarity Studies
The Astrophysical Journal, 2023 Teraelectronvolt halos have been suggested to be a common phenomenon associated with middle-aged pulsars. Based on our recent work on the middle-aged pulsar J0631+1036, which is the only known source positionally coincident with a hard teraelectronvolt γ
Dong Zheng, Zhongxiang Wang
doaj +1 more source
Swift Follow-up of Reported Radio Pulsars at Fermi 4FGL Unassociated Sources
The Astrophysical Journal, 2023 Following the discovery of radio pulsars at the position of Fermi-LAT unassociated sources by the TRAPUM group, we conduct Swift-XRT observations of six of those 4FGL sources to determine if any pulsar-like X-ray sources are present and to confirm the ...
Stephen Kerby +2 more
doaj +1 more source
Prompt gamma-ray methods for industrial process evaluation: A simulation study
Nukleonika, 2022 Radioisotope applications in industrial process inspection and evaluation using gamma-ray emitters provide otherwise unavailable information. Offering alternative gamma-ray sources can support the technology by complementing sources’ availability and ...
Mohammed Mohammed Siddig H. +5 more
doaj +1 more source
Differential Source Count for Gamma-Ray Bursts [PDF]
The Astrophysical Journal, 2021 Abstract Different forms of long gamma-ray burst (GRB) luminosity functions are considered on the basis of an explicit physical model. The inferred flux distributions are compared with the observed ones from two samples of GRBs, Swift and Fermi GBM.
Shreya Banerjee +2 more
openaire +2 more sources
A Search for Blazar-Like Radio-Loud Narrow-Line Seyfert 1 Galaxies
Galaxies, 2017 We report the results of an observational program to investigate the gamma-ray and optical variability properties of the vRL NLSY1 galaxies listed in the Yuan et al. sample. We have identified 17 members of the Yuan et al. sample possibly associated with
Hugh R. Miller +6 more
doaj +1 more source
Model for the diffuse gamma-ray and neutrino emission of the Milky Way at multi-TeV energies [PDF]
, 2023 International audienceWe are developing new model propagation of cosmic rays in the Galaxy from their sources in three dimensional magnetic field. The model automatically takes into account anisotropic distribution of cosmic rays around their sources at ...
Koldobskiy, Sergey +4 more
core +1 more source