Results 41 to 50 of about 483,738 (220)

Fermi detection of delayed GeV emission from the short GRB 081024B [PDF]

open access: yes, 2010
We report on the detailed analysis of the high-energy extended emission from the short Gamma-Ray Burst (GRB) 081024B, detected by the Fermi Gamma-ray Space Telescope.
A. A. Abdo   +237 more
core   +15 more sources

Fermi gamma-ray space telescope: Science highlights for the first 8 months [PDF]

open access: greenNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2010
The Fermi Gamma-ray Space Telescope was launched on June 11, 2008 and since August 2008 has successfully been conducting routine science observations of high energy phenomena in the gamma-ray sky. A number of exciting discoveries have been made during its first year of operation, including blazar flares, high-energy gamma-ray bursts, and numerous new ...
Alexander Moiseev
openalex   +3 more sources

GRAINE project: precise gamma-ray observations with balloon-borne emulsion telescope [PDF]

open access: yesEPJ Web of Conferences, 2019
Observation of cosmic gamma rays is important in the understanding of high-energy objects or phenomena in the universe. Since 2008, the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope (Fermi-LAT) has surveyed the sub-GeV/GeV gamma-ray ...
Rokujo Hiroki
doaj   +1 more source

The Third Fermi Large Area Telescope Catalog of Gamma-Ray Pulsars

open access: yesThe Astrophysical Journal, 2023
We present 294 pulsars found in GeV data from the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope. Another 33 millisecond pulsars (MSPs) discovered in deep radio searches of LAT sources will likely reveal pulsations once phase-connected
D. A. Smith   +170 more
doaj   +1 more source

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

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

Pulsar Observations with the Fermi Gamma-ray Space Telescope

open access: green, 2009
The Large Area Telescope (LAT) on Fermi, launched on 2008 June 11, is a space telescope to explore the high energy gamma-ray universe. The instrument covers the energy range from 20 MeV to 300 GeV with greatly improved sensitivity and ability to localize gamma-ray point sources.
D. Parent
openalex   +3 more sources

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

A tool to understand emission mechanisms of blazars through their high‐energy gamma‐ray emission

open access: yesAstronomische Nachrichten, Volume 344, Issue 6, August 2023., 2023
The blazar SED is characterized by two energy components. Evidence suggests that the low‐energy component is generated by the synchrotron mechanism, but for the high‐energy component, the mechanism is still uncertain. Two main models have been proposed to explain this emission. According to the leptonic model, a correlation between the emission of both
Mabel Osorio   +3 more
wiley   +1 more source

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