Results 1 to 10 of about 712,854 (335)

Unidentifed gamma-ray sources: hunting gamma-ray blazars [PDF]

open access: yes, 2012
One of the main scientific objectives of the ongoing Fermi mission is unveiling the nature of the unidentified gamma-ray sources (UGSs). Despite the large improvements of Fermi in the localization of gamma-ray sources with respect to the past gamma-ray ...
A. Paggi   +5 more
core   +15 more sources

The First LHAASO Catalog of Gamma-Ray Sources [PDF]

open access: yesThe Astrophysical Journal Supplement Series, 2023
We present the first catalog of very-high-energy and ultra-high-energy gamma-ray sources detected by the Large High Altitude Air Shower Observatory. The catalog was compiled using 508 days of data collected by the Water Cherenkov Detector Array from 2021
Zhen Cao   +280 more
doaj   +2 more sources

Massive protostars as gamma-ray sources [PDF]

open access: yesAstronomy and Astrophysics, 2009
Massive protostars have associated bipolar outflows with velocities of hundreds of km s$^{-1}$. Such outflows can produce strong shocks when interact with the ambient medium leading to regions of non-thermal radio emission.
A. T. Araudo   +38 more
core   +10 more sources

GeV Gamma-Ray Sources [PDF]

open access: yesAIP Conference Proceedings, 2000
We report on the preliminary extension of our work on cataloging the GeV sky to approximately 7 years of CGRO/EGRET observations with special emphasis on a search for transient sources. The search method and significance levels are presented. Our initial
Lamb, R. C., Macomb, D. J.
core   +4 more sources

Unveiling the nature of the unidentified gamma-ray sources III: gamma-ray blazar-like counterparts at low radio frequencies [PDF]

open access: yes, 2013
About one third of the gamma-ray sources listed in the second Fermi LAT catalog (2FGL) have no firmly established counterpart at lower energies so being classified as unidentified gamma-ray sources (UGSs). Here we propose a new approach to find candidate
D'Abrusco, R.   +7 more
core   +7 more sources

Fermi Large Area Telescope Bright Gamma-ray Source List [PDF]

open access: yesThe Astrophysical Journal Supplement Series, 2009
Following its launch in June 2008, the Fermi Gamma-ray Space Telescope (Fermi) began a sky survey in August. The Large Area Telescope (LAT) on Fermi in 3 months produced a deeper and better-resolved map of the gamma-ray sky than any previous space ...
A. A. Abdo   +252 more
core   +10 more sources

On the Potential of Bright, Young Pulsars to Power Ultrahigh Gamma-Ray Sources [PDF]

open access: yesAstrophysical Journal Letters, 2022
The recent discovery of a new population of ultrahigh-energy gamma-ray sources with spectra extending beyond 100 TeV revealed the presence of Galactic PeVatrons—cosmic-ray factories accelerating particles to PeV energies.
E. de Oña Wilhelmi   +3 more
semanticscholar   +1 more source

The TRAPUM L-band survey for pulsars in Fermi-LAT gamma-ray sources [PDF]

open access: yes, 2022
More than 100 millisecond pulsars (MSPs) have been discovered in radio observations of gamma-ray sources detected by the Fermi Large Area Telescope (LAT), but hundreds of pulsar-like sources remain unidentified.
C. Clark   +37 more
semanticscholar   +1 more source

3HWC: The Third HAWC Catalog of Very-high-energy Gamma-Ray Sources [PDF]

open access: yesAstrophysical Journal, 2020
We present a new catalog of TeV gamma-ray sources using 1523 days of data from the High-Altitude Water Cherenkov (HAWC) Observatory. The catalog represents the most sensitive survey of the northern gamma-ray sky at energies above several TeV, with three ...
A. Albert   +106 more
semanticscholar   +1 more source

On the Properties of Inverse Compton Spectra Generated by Upscattering a Power-law Distribution of Target Photons

open access: yesThe Astrophysical Journal, 2023
Relativistic electrons are an essential component in many astrophysical sources, and their radiation may dominate the high-energy bands. Inverse Compton (IC) emission is the radiation mechanism that plays the most important role in these bands. The basic
Dmitry Khangulyan   +2 more
doaj   +1 more source

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