Results 71 to 80 of about 26,003 (179)

Likely Detection of γ-Ray Pulsations of PSR J1717+4308A in NGC 6341 and Implication of the γ-Ray Millisecond Pulsars in Globular Clusters

open access: yesThe Astrophysical Journal, 2023
We report our analysis results for the globular cluster (GC) NGC 6341 (M92), as a millisecond pulsar (MSP) J1717+4308A has recently been reported found in this GC.
Pengfei Zhang   +4 more
doaj   +1 more source

Science highlights from the Fermi Large Area Telescope [PDF]

open access: yes, 2011
During its first three years of operation, the Fermi Gamma-ray Space Telescope has provided an unprecedented view of the high energy gamma-ray sky, and also performed direct measurements of the cosmic-ray leptons and searches for signals from dark matter.
Baldini, L., Tibaldo, L.
core   +2 more sources

The Fermi GBM and LAT follow-up of GW150914

open access: yesEPJ Web of Conferences, 2017
As the first detection of Gravitation Wave (GW) event arising from the coalescence of two stellar-mass Black Holes (BH) was announced by LIGO, a new era for astronomy began.
Bissaldi E.   +5 more
doaj   +1 more source

Fermi Paper Model (Formerly GLAST Paper Model) [PDF]

open access: yes, 2009
This paper model provides a short description of the scientific instruments on board GLAST as well as links to other resources about the GLAST instruments. There is also a short description of how GLAST detects gamma-rays with the Large Area Telescope as

core  

Pre-burst neutrinos of gamma-ray bursters accompanied by high-energy photons

open access: yesPhysics Letters B, 2021
Previous researches on high-energy neutrino events from gamma-ray bursters (GRBs) suggest a neutrino speed variation v(E)=c(1±E/ELVν) with ELVν=(6.4±1.5)×1017 GeV, together with an intrinsic time difference Δtin=(−2.8±0.7)×102 s, which means that high ...
Jie Zhu, Bo-Qiang Ma
doaj   +1 more source

TeV Dark Matter Searches in the Extragalactic Gamma-ray Sky

open access: yesGalaxies, 2022
High-energetic gamma rays from astrophysical targets constitute a unique probe for annihilation or decay of heavy particle dark matter (DM). After several decades, diverse null detections have resulted in strong constraints for DM particle masses up to ...
Moritz Hütten, Daniel Kerszberg
doaj   +1 more source

TANAMI - Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry

open access: yes, 2010
We present a summary of the observation strategy of TANAMI (Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry), a monitoring program to study the parsec-scale structure and dynamics of relativistic jets in active galactic nuclei (
A. K. Tzioumis   +26 more
core   +1 more source

Unveiling the Origin of the Fermi Bubbles

open access: yesGalaxies, 2018
The Fermi bubbles, two giant structures above and below the Galactic center (GC), are among the most important discoveries of the Fermi Gamma-ray Space Telescope.
H.-Y. Karen Yang   +2 more
doaj   +1 more source

On the Spectral Shape of Non-recycled γ-ray Pulsars [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2016
More than 100 γ−ray pulsars have been discovered by the Fermi Gamma-ray Space Telescope. With a significantly enlarged sample size, it is possible to compare the properties of different classes. Radio-quiet (RQ) γ−ray pulsars form a distinct population,
Chung-Yue Hui, Jongsu Lee
doaj   +1 more source

Highlights of GeV Gamma-Ray Astronomy [PDF]

open access: yes, 2010
Because high-energy gamma rays are primarily produced by high-energy particle interactions, the gamma-ray survey of the sky by the Fermi Gamma-ray Space Telescope offers a view of sites of cosmic ray production and interactions. Gamma-ray bursts, pulsars,
Thompson, David J.
core   +1 more source

Home - About - Disclaimer - Privacy