Results 21 to 30 of about 654,178 (344)

Extending the event-weighted pulsation search to very faint gamma-ray sources [PDF]

open access: yesAstronomy & Astrophysics, 2018
Context. Because of the relatively broad angular resolution of current gamma-ray instruments in the MeV–GeV energy range, the photons of a given source are mixed with those coming from nearby sources or diffuse background. This source confusion seriously
P. Bruel
semanticscholar   +1 more source

An Indication of Anisotropy in Arrival Directions of Ultra-high-energy Cosmic Rays through Comparison to the Flux Pattern of Extragalactic Gamma-Ray Sources [PDF]

open access: yes, 2018
A new analysis of the data set from the Pierre Auger Observatory provides evidence for anisotropy in the arrival directions of ultra-high-energy cosmic rays on an intermediate angular scale, which is indicative of excess arrivals from strong, nearby ...
T. P. A. C. A. Aab   +391 more
semanticscholar   +1 more source

AGILE Detection of Gamma-Ray Sources Coincident with Cosmic Neutrino Events [PDF]

open access: yesAstrophysical Journal, 2018
The origin of cosmic neutrinos is still largely unknown. Using data obtained by the gamma-ray imager on board the Astro-rivelatore Gamma a Immagini Leggero (AGILE) satellite, we systematically searched for transient gamma-ray sources above 100 MeV that ...
F. Lucarelli   +41 more
semanticscholar   +1 more source

All-sky Medium Energy Gamma-ray Observatory eXplorer mission concept [PDF]

open access: yesJournal of Astronomical Telescopes Instruments and Systems, 2022
. The All-sky Medium Energy Gamma-ray Observatory eXplorer (AMEGO-X) is designed to identify and characterize gamma rays from extreme explosions and accelerators. The main science themes include supermassive black holes and their connections to neutrinos
R. Caputo   +54 more
semanticscholar   +1 more source

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

open access: yesAstrophysical 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
semanticscholar   +1 more source

CLASSIFICATION AND RANKING OF FERMI LAT GAMMA-RAY SOURCES FROM THE 3FGL CATALOG USING MACHINE LEARNING TECHNIQUES [PDF]

open access: yes, 2016
We apply a number of statistical and machine learning techniques to classify and rank gamma-ray sources from the Third Fermi Large Area Telescope Source Catalog (3FGL), according to their likelihood of falling into the two major classes of gamma-ray ...
P. S. Parkinson   +6 more
semanticscholar   +1 more source

Swift Follow-up of Reported Radio Pulsars at Fermi 4FGL Unassociated Sources

open access: yesThe Astrophysical Journal, 2023
Following the discovery of radio pulsars at the position of Fermi-LAT unassociated sources by the TRAPUM group, we conduct Swift-XRT observations of six of those 4FGL sources to determine if any pulsar-like X-ray sources are present and to confirm the ...
Stephen Kerby   +2 more
doaj   +1 more source

The Second Catalog of Flaring Gamma-Ray Sources from the Fermi All-sky Variability Analysis [PDF]

open access: yes, 2016
We present the second catalog of flaring gamma-ray sources (2FAV) detected with the Fermi All-sky Variability Analysis (FAVA), a tool that blindly searches for transients over the entire sky observed by the Large Area Telescope (LAT) on board the Fermi ...
S. Abdollahi   +126 more
semanticscholar   +1 more source

Fermi establishes classical novae as a distinct class of gamma-ray sources [PDF]

open access: yesScience, 2014
Gamma-ray novas may be garden variety When astronomers detected gamma rays from the nova V407 Cyg, an explosive mass transfer from a red giant onto a white dwarf, they found it surprising enough.
The Fermi Collaboration
semanticscholar   +1 more source

Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow. [PDF]

open access: yesScience, 2021
Gamma-ray bursts (GRBs), which are bright flashes of gamma rays from extragalactic sources followed by fading afterglow emission, are associated with stellar core collapse events.
H. Abdalla   +237 more
semanticscholar   +1 more source

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