Results 51 to 60 of about 638,354 (389)
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
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
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
Gamma rays and neutrinos from a cosmic ray source in the Galactic Center region [PDF]
, 2013 The center of the our Galaxy is a region where very energetic phenomena take place. In particular powerful cosmic ray sources can be located in that region.
Supanitsky, A. D.
core +2 more sources
Do gamma-ray burst sources repeat? [PDF]
Monthly Notices of the Royal Astronomical Society, 1993 Following the discovery by Quashnock and Lamb (1993) of an apparent excess of $ $-ray burst pairs with small angular separations, we reanalyze the angular distribution of the bursts in the BATSE catalogue. We find that in addition to an excess of close pairs, there is also a comparable excess of antipodal bursts, i.e pairs of bursts separated by about
Ramesh Narayan, Tsvi Piran
openaire +5 more sources
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
On the cosmic ray bound for models of extragalactic neutrino production [PDF]
, 2000 We obtain the maximum diffuse neutrino intensity predicted by hadronic photoproduction models of the type which have been applied to the jets of active galactic nuclei or gamma ray bursts.
A. A. Watson +82 more
core +2 more sources
THE FERMI ALL-SKY VARIABILITY ANALYSIS: A LIST OF FLARING GAMMA-RAY SOURCES AND THE SEARCH FOR TRANSIENTS IN OUR GALAXY [PDF]
, 2013 In this paper, we present the Fermi All-sky Variability Analysis (FAVA), a tool to systematically study the variability of the gamma-ray sky measured by the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. For each direction on the sky,
M. Ackermann +154 more
semanticscholar +1 more source
Observation of Galactic Gamma-ray Sources with VERITAS
, 2008 We report on VERITAS observations at energies above 200 GeV of known or potential galactic gamma-ray sources. The observed objects comprise pulsars, pulsar wind nebulae, high-mass X-ray binaries and gamma-ray sources with unknown counterparts in other ...
Felix A. Aharonian +4 more
core +1 more source