Results 41 to 50 of about 654,178 (344)
Very High Energy Gamma-Ray Observations of the Galactic Centre Region [PDF]
, 2008 Recent progress in pushing the sensitivity of the Imaging Atmospheric Cherenkov Technique into the 10 mCrab regime has enabled first sensitive observations of the innermost few 100 pc of the Milky Way in Very High Energy (VHE; >100 GeV) gamma rays. These
Christopher van Eldik +3 more
core +2 more sources
Runaway massive stars as variable gamma-ray sources [PDF]
, 2014 Runaway stars are ejected from their formation sites well within molecular cores in giant dark clouds. Eventually, these stars can travel through the molecular clouds, which are highly inhomogeneous.
M. V. D. Valle, G. Romero
semanticscholar +1 more source
Very-High-Energy Gamma-Ray Signal from Nuclear Photodisintegration as a Probe of Extragalactic Sources of Ultrahigh-Energy Nuclei [PDF]
, 2010 It is crucial to identify the ultrahigh-energy cosmic-ray (UHECR) sources and probe their unknown properties. Recent results from the Pierre Auger Observatory favor a heavy nuclear composition for the UHECRs.
E. Carmona +4 more
core +2 more sources
SWIFT X-RAY TELESCOPE MONITORING OF FERMI-LAT GAMMA-RAY SOURCES OF INTEREST [PDF]
, 2013 We describe a long-term Swift monitoring program of Fermi gamma-ray sources, particularly the 23 gamma-ray “sources of interest.” We present a systematic analysis of the Swift X-Ray Telescope light curves and hardness ratios of these sources, and we ...
M. Stroh, A. Falcone
semanticscholar +1 more source
The Upcoming GAMMA-400 Experiment
Universe, 2023 The upcoming GAMMA-400 experiment will be implemented aboard the Russian astrophysical space observatory, which will be operating in a highly elliptical orbit over a period of 7 years to provide new data on gamma-ray emissions and cosmic-ray electron ...
Sergey I. Suchkov +18 more
doaj +1 more source
New stage in high-energy gamma-ray studies with GAMMA-400 after Fermi-LAT
EPJ Web of Conferences, 2017 Fermi-LAT has made a significant contribution to the study of high-energy gamma-ray diffuse emission and the observations of 3000 discrete sources. However, one third of all gamma-ray sources (both galactic and extragalactic) are unidentified, the data ...
Topchiev N.P. +35 more
doaj +2 more sources
The Astrophysical Journal, 2023 We present a comprehensive study of 29 short gamma-ray bursts (SGRBs) observed ≈0.8−60 days postburst using Chandra and XMM-Newton. We provide the inferred distributions of the SGRB jet opening angles and true event rates to compare against neutron star ...
A. Rouco Escorial +16 more
doaj +1 more source
GLAST: Understanding the High Energy Gamma-Ray Sky
, 2004 We discuss the ability of the GLAST Large Area Telescope (LAT) to identify, resolve, and study the high energy gamma-ray sky. Compared to previous instruments the telescope will have greatly improved sensitivity and ability to localize gamma-ray point ...
A Konopelko +89 more
core +1 more source
UNVEILING THE NATURE OF THE UNIDENTIFIED GAMMA-RAY SOURCES. IV. THE SWIFT CATALOG OF POTENTIAL X-RAY COUNTERPARTS [PDF]
, 2013 A significant fraction (∼30%) of the high-energy γ-ray sources listed in the second Fermi Large Area Telescope (LAT) catalog are still of unknown origin, having not yet been associated with counterparts at lower energies.
A. Paggi +7 more
semanticscholar +1 more source
Exploring the bulk of the BL Lac object population:1. parsec-scale radio structures
, 2013 Context. The advent of Fermi is changing our understanding on the radio and gamma-ray emission in Active Galactic Nuclei. Contrary to pre-Fermi ideas, BL Lac objects are found to be the most abundant emitters in the gamma-ray band.
Boccardi, B. +9 more
core +1 more source