Sentences with phrase «for blazars»
The relationship effectively connects the dots for blazars across an enormous swath of the electromagnetic spectrum.
https://www.sciencedaily.com/ Not exact matches
This event was so exceptional that for a few days this object was the brightest blazar observed until now.
The infrared / gamma - ray connection led the authors to search for new blazar candidates among WISE infrared sources located within the positional uncertainties of Fermi's unidentified gamma - ray objects.
A blazar appears bright to Fermi for two reasons.
Francesco Massaro at the University of Turin in Italy and Raffaele D'Abrusco at the Harvard - Smithsonian Center for Astrophysics in Cambridge, Massachusetts, show for the first time that the mid-infrared colors of blazars in WISE data correlate to an equivalent measurement of their gamma - ray output.
Astronomer Fabrizio Nicastro of the Harvard - Smithsonian Center for Astrophysics in Cambridge, Massachusetts, and his colleagues monitored the galaxy Markarian 421, which contains a «blazar» — an active black hole that aims powerful jets of energy toward Earth.
In a detailed analysis of high - energy EGB gamma rays, published April 14 in Physical Review Letters, Ajello and his team show that blazars and other discrete sources can account for nearly all of this emission.
However, rather than emitting violent bursts of gamma - ray radiation, like blazars, Seyfert galaxies are known for their strong ultra-violet emissions.
Observations of blazars by NASA's Fermi Gamma Ray Telescope spacecraft for the first time detected that gamma rays from distant blazars are indeed attenuated more than gamma rays from nearby blazars, a result announced on November 30, 2012, in a paper published in Science, as theoretically predicted.