4FHL: The Fourth Catalog of Hard Fermi-LAT Sources

arXiv:2609.31457 · astro-ph.HE · Submitted 2026-09-25 · Read on arXiv

astro-ph.HE

Submitted: 2026-09-25

Updated: 2026-09-25

Terminology

• AGN — 7× in this paper · explained in 1 episode
• Active Regions — 1× in this paper · explained in 1 episode
• Adam — 1× in this paper · explained in 2 episodes
• Core — 1× in this paper · explained in 2 episodes
• For the Large Magellanic Cloud — 1× in this paper
• GeV by the Fermi Large Area Telescope — 1× in this paper
• High Synchrotron Peak — 1× in this paper
• High-Energy Photon — 1× in this paper
• Trace — 1× in this paper · explained in 2 episodes

Sources

• Search for Extended GeV Sources in the Inner Galactic Plane
• Hunting Very High-Energy ($>$100 GeV) Emitting High-Synchrotron Peaked Blazars
• Pass 8: Toward the Full Realization of the Fermi-LAT Scientific Potential
• Fermi Large Area Telescope Fourth Source Catalog Data Release 4 (4FGL-DR4)
• Recent Highlights from the VERITAS AGN Discovery Program
• Fermi-LAT improved Pass~8 event selection
• A comprehensive view of PKS 2155-304 from 2008 to 2023 through a multi-epoch modeling of its spectral energy distributions
• The Cherenkov Telescope Array
• The Southern Wide-Field Gamma-Ray Observatory (SWGO): A Next-Generation Ground-Based Survey Instrument for VHE Gamma-Ray Astronomy
• Particle acceleration and synchrotron emission in blazar jets
• The Vela pulsar and its pulsar wind nebula Vela-X using 13 years of Fermi-LAT Observations
• Insight into the origin of multiwavelength emissions of PKS 1510-089 through modeling 12 SEDs from 2008 to 2015
• Evidence for hybrid gamma-ray emission from the supernova remnant G150.3+4.5
• 2FHLJ1745.1-3035: A Newly Discovered, Powerful Pulsar Wind Nebula Candidate
• The Inner Jet of the Quasar PKS 1510$-$089 as Revealed by Multi-waveband Monitoring
• Catalog of very-high-energy emitting active galactic nuclei at high Galactic latitudes
• The VERITAS Survey of the Cygnus Region of the Galaxy
• Multiwavelength Analysis of Galactic Supernova Remnants

Related papers

• Numerical Studies of Accretion Flows onto a Neutron Star Engulfed in a Massive Star
• Collisionless Accretion of Finite-Angular-Momentum Plasma onto a Spinning Black Hole
• Impact of Magnetic Field Topology on Electromagnetic and Gravitational Waves from Binary Neutron Star Merger Remnants
• XRISM Resolve Spectroscopy of GX 5-1: Constraints on Iron Spectral Features in a Luminous Neutron-Star Binary
• SN 1006: A Cosmic Laboratory for Investigating Shock Acceleration Physics
• Neutrino Spectral Pinching in 3D Core-Collapse Supernovae: Late-Time Convergence, Failed-Explosion Signatures, and Viewing-Angle Dispersion