Results 31 to 40 of about 5,582,399 (288)
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
An Aerial Gamma Ray Survey of the Surrounding Area of Sizewell Nuclear Power Station [PDF]
, 1997 <p>An airborne gamma ray survey of the surroundings of the Sizewell nuclear power station was conducted to define the present levels of radiation background for reference purposes. A twin engine helicopter fitted with a high volume NaI detector and
Sanderson, D.C.W. +3 more
core +5 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
Microquasars as High-energy Gamma-ray Sources [PDF]
Chinese Journal of Astronomy and Astrophysics, 2005 Invited talk presented at the V Microquasar Workshop, Beijing, June 2004. Accepted for publication in the Chinese Journal of Astronomy and Astrophysics.
openaire +3 more sources
OBSERVATIONS OF GALACTIC GAMMA-RAY SOURCES WITH H.E.S.S. [PDF]
Energy Budget in the High Energy Universe, 2007 13 pages, 10 figures, based on a talk presented at the workshop 'Energy Budget in the High Energy Universe', Kashiwa, Japan 22 - 24 February ...
openaire +3 more sources
Naked Forward Shock Seen in the TeV Afterglow Data of GRB 221009A
The Astrophysical JournalWe explore the implications of the light curve of the early TeV gamma-ray afterglow of GRB 221009A reported by the LHAASO Collaboration. We show that the reported offset of the reference time, T _* , allows the determination of the activation time of the
Dmitry Khangulyan +2 more
doaj +1 more source
Gamma-Ray Bursts as Neutrino Sources [PDF]
, 2017 13 pages, review to appear in "Neutrino Astronomy- Current status, future prospects", Eds. T. Gaisser \& A. Karle (World Scientific)
openaire +2 more sources
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
The Astrophysical JournalGamma-ray bursts (GRBs) are particle acceleration sites that can emit photons in the very high-energy (VHE) domain through nonthermal processes. From 2004 until 2018, the current generation of Imaging Atmospheric Cherenkov Telescopes (IACTs) did not ...
H. Ashkar +5 more
doaj +1 more source