Gamma-ray bursts are useful measurement tools in cosmology — with a few caveats. The main one is that it takes the observation of a tremendously large number of GRBs to draw meaningful ...

Isotropic gamma-ray background. As far back as the late 1960s, orbiting observatories found a diffuse background of gamma rays streaming from all directions in the universe.

Isotropic Gamma-Ray Background. As far back as the late 1960’s, orbiting observatories have found a diffuse background of gamma rays streaming from all directions in the universe.

IN his article on the isotropic gamma ray background, Cheng1 presents instructive calculations of the production and propagation of inverse Compton gamma rays in an expanding universe. The latter ...

Gamma-ray bursts (GRBs) are flashes of gamma rays (electromagnetic radiation of high frequency) ... The results from BATSE showed that the distribution of GRBs in the sky were isotropic.

"The gamma rays allowed for a precise localization of where the gravitational waves were coming from, ... Isotropic refers to being evenly transmitted in all directions.

Gamma-ray flares from blazars can be accompanied by high-energy neutrino emission. To better understand this phenomenon, an international research team has statistically analyzed 145 bright blazars.

Gamma rays can only be detected by sensors made of dense metals and takes over six feet (1.8 meters) of concrete to block.

Researchers from the Max Planck Institute for Astrophysics and the University of Amsterdam GRAPPA Center of Excellence just published the most precise analysis so far of the fluctuations in the gam… ...

"Gamma-ray bursts can be seen at incredibly large distances ... have had sufficient time in the 13.8 billion-year-old universe to form if the spread of matter is homogeneous and isotropic. ...