Results 1 to 10 of about 654,178 (344)
The 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
Limits on Leptonic TeV Emission from the Cygnus Cocoon with Swift-XRT
The Astrophysical Journal, 2023 γ -ray observations of the Cygnus Cocoon, an extended source surrounding the Cygnus X star-forming region, suggest the presence of a cosmic-ray accelerator reaching energies up to a few PeV.
David Guevel +7 more
doaj +1 more source
Evidence for Two Distinct Populations of Kilonova-associated Gamma-Ray Bursts
The Astrophysical Journal Letters, 2023 Identification of gamma-ray burst (GRB) progenitors based on the duration of their prompt emission ( T _90 ) has faced several roadblocks recently. Long-duration GRBs (with T _90 > 2 s) have traditionally been thought to be originating from the collapse ...
Dimple, K. Misra, K. G. Arun
doaj +1 more source
The Astrophysical Journal Letters, 2023 GRB 221009A has been referred to as the brightest of all time (BOAT). We investigate the veracity of this statement by comparing it with a half century of prompt gamma-ray burst observations.
Eric Burns +29 more
doaj +1 more source
Unidentifed gamma-ray sources: hunting gamma-ray blazars [PDF]
, 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 +7 more sources
Revision of the γ-Ray Emission from SNR CTB 109 with the Fermi Large Area Telescope
The Astrophysical Journal, 2023 CTB 109 is a middle-aged shell-type supernova remnant (SNR) with bright thermal X-ray emission. We reanalyze the GeV γ -ray emission from CTB 109 using 13 yr of Pass 8 data recorded by the Fermi Large Area Telescope.
Yuliang Xin, Qizhen Zhao, Xiaolei Guo
doaj +1 more source
The Astrophysical Journal, 2023 We present an analysis of γ -ray emission in the direction of supernova remnant (SNR) G15.4+0.1 with 13 yr Fermi Large Area Telescope data. There are three point-like GeV sources in this region: one is spatially coincident with the TeV source HESS J1818 ...
Yuan Li, Yuliang Xin, Siming Liu, Yu He
doaj +1 more source
Two Candidate Pulsar TeV Halos Identified from Property-similarity Studies
The Astrophysical Journal, 2023 Teraelectronvolt halos have been suggested to be a common phenomenon associated with middle-aged pulsars. Based on our recent work on the middle-aged pulsar J0631+1036, which is the only known source positionally coincident with a hard teraelectronvolt γ
Dong Zheng, Zhongxiang Wang
doaj +1 more source
, 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 +1 more source
Massive protostars as gamma-ray sources [PDF]
, 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 +6 more sources