Results 31 to 40 of about 460 (205)

FermiGamma-ray Space Telescope Observations of the Gamma-ray Outburst from 3C454.3 in November 2010 [PDF]

open access: diamondJournal of Physics: Conference Series, 2012
The flat-spectrum radio quasar 3C454.3 underwent an extraordinary 5-day γ-ray outburst in November 2010 when the daily flux measured with the Fermi Large Area Telescope (LAT) at photon energies E > 100MeV reached (66±2) × 10−6ph cm−2s−1. This is a factor of 3 higher than its previous maximum flux recorded in December 2009 and > 5 times brighter than ...
B. Lott, C. D. Dermer, L. Escande
openalex   +2 more sources

FERMI GAMMA-RAY SPACE TELESCOPE OBSERVATIONS OF THE GAMMA-RAY OUTBURST FROM 3C454.3 IN NOVEMBER 2010 [PDF]

open access: yesThe Astrophysical Journal, 2011
Contact authors: Lise Escande, Charles Dermer and Benoit Lott. One new figure.
Abdo, A. A.   +152 more
openaire   +11 more sources

XStorm: A New Gamma Ray Spectrometer for Detection of Close Proximity Gamma Ray Glows and TGFs

open access: yesJournal of Geophysical Research: Atmospheres, Volume 128, Issue 24, 27 December 2023., 2023
Abstract In this paper, we present XStorm, a gamma ray spectrometer developed to detect gamma ray glows and terrestrial gamma ray flashes (TGFs) in close proximity. Measurements are mostly planned to take place on balloon campaigns but also on the ground using bigger detectors.
Melody Pallu   +4 more
wiley   +1 more source

Fermi Gamma-Ray Space Telescope [PDF]

open access: yesOptical Engineering, 2012
The Fermi Gamma-ray Space Telescope, launched in June 2008, is an observatory designed to survey the high-energy gamma-ray sky. The primary instrument, the Large Area Telescope (LAT), provides observations from 20 MeV to greater than 300 GeV. A second instrument, the Gamma-ray Burst Monitor (GBM), provides observations of transients from less than 10 ...
openaire   +1 more source

Exploring the extreme universe with the Fermi Gamma-Ray Space Telescope [PDF]

open access: bronzePhysics Today, 2012
The Fermi orbiter, mapping the entire gamma-ray sky every three hours, monitors the cosmos for high-energy phenomena both fleeting and enduring.
D. J. Thompson   +2 more
openalex   +3 more sources

Fully depleted charge‐coupled device design and technology development

open access: yesAstronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023
Abstract We describe the advancement of fully depleted charge‐coupled device (CCD) technology for scientific applications. Recent efforts on 650–725 μ$$ \mu $$m‐thick CCDs for direct dark‐matter and radiation detection with single‐electron sensitivity are described, as well as the technology transfer of the fully depleted CCD technology to 200 mm‐wafer
Stephen E. Holland
wiley   +1 more source

Characterization of Thunderstorm Cells Producing Observable Terrestrial Gamma‐Ray Flashes

open access: yesJournal of Geophysical Research: Atmospheres, Volume 128, Issue 17, 16 September 2023., 2023
Abstract The meteorological conditions required for the production of Terrestrial Gamma‐ray Flashes (TGFs) are not well understood. Particularly, the link between TGF production, meteorology, and weather severity is poorly characterized with most works focusing on only a small set of TGF events or isolated storms.
Lasse Skaaning Husbjerg   +7 more
wiley   +1 more source

Latest Results from the Fermi Gamma-Ray Telescope

open access: yesActa Polytechnica CTU Proceedings, 2014
Can we learn about New Physics with astronomical and astro-particle data? Since its launch in 2008, the Large Area Telescope, onboard of the Fermi Gamma-ray Space Telescope, has detected the largest amount of gamma rays in the 20 MeV - 300 GeV energy ...
Aldo Morselli
doaj   +1 more source

Identifying the Gamma-Ray Emission of the Nearby Galaxy M83

open access: yesThe Astrophysical Journal, 2023
We report on the detection of a γ -ray source at the position of the nearby star-forming galaxy (SFG) M83, which is found from our analysis of 14 yr of the data obtained with the Large Area Telescope on board the Fermi Gamma-ray Space Telescope (Fermi ...
Yi Xing, Zhongxiang Wang
doaj   +1 more source

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