Fermi Gamma-ray Space Telescope Observations of Recent Gamma-ray Outbursts from 3C 454.3
, 2010 The flat spectrum radio quasar 3C~454.3 underwent an extraordinary outburst in December 2009 when it became the brightest gamma-ray source in the sky for over one week. Its daily flux measured with the Fermi Large Area Telescope at photon energies E>100 MeV reached F = 22+/-1 x 10^-6 ph cm^-2 s^-1, representing the highest daily flux of any blazar ...
openaire +2 more sources
PKS 2254+074: A Blazar in Likely Association with the Neutrino Event IceCube-190619A
The Astrophysical Journal LettersWe report our study of the field of the ≃0.2 PeV neutrino event IC-190619A. This neutrino belongs to Gold events, which more likely have an astrophysical origin.
Shunhao Ji, Zhongxiang Wang
doaj +1 more source
Pulsar Observations with the Fermi Gamma-ray Space Telescope
, 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.
openaire +1 more source
86th Annual Meeting of the Meteoritical Society (2024)
Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley +1 more source
Very high-energy gamma-ray emission beyond 10 TeV from GRB 221009A. [PDF]
Sci Adv, 2023 LHAASO Collaboration.
europepmc +1 more source
The large area telescope on the fermi gamma-ray space telescope mission
The large area telescope on the fermi gamma-ray space telescope mission著者人数：240名 Accepted: 2009-03-19 資料番号 ...
openaire +1 more source
Sixteen Years of Gamma-Ray Discoveries and AGN Observations with Fermi-LAT
ParticlesIn June 2024, the Fermi Gamma-Ray Space Telescope (FGST) celebrated its 16th year of operations. The Fermi Large Area Telescope (Fermi-LAT) is the main instrument onboard the FGST satellite and is designed to be sensitive to γ-rays in the energy range ...
Fausto Casaburo +3 more
doaj +1 more source
Fermi Unassociated Sources in the MeerKAT Absorption Line Survey
The Astrophysical JournalOver 2000 γ -ray sources identified by the Large Area Telescope on NASA's Fermi Gamma-ray Space Telescope are considered unassociated, meaning that they have no known counterparts in any other frequency regime.
Morgan Himes +10 more
doaj +1 more source
Discerning Misclassified Flat-spectrum Radio Quasars from Low-frequency-peaked BL Lacertae Objects
The Astrophysical Journal Supplement SeriesA sample of 312 low-frequency-peaked BL Lacertae objects (LBLs) and 694 flat-spectrum radio quasars (FSRQs) with the parameters of both redshift and gamma-ray photon spectral index (Γ _γ ) is compiled from the Fourth Catalog of Active Galactic Nuclei ...
S. Liang +3 more
doaj +1 more source
Energy-dependent intrinsic time delay of gamma-ray bursts on testing Lorentz invariance violation
Physics Letters BHigh-energy photons of gamma-ray bursts (GRBs) might be emitted at different intrinsic times with energy dependence at the source. In this letter, we expand the model from previous works on testing the Lorentz Invariance Violation (LV) with the observed ...
Hanlin Song, Bo-Qiang Ma
doaj +1 more source