A Tentative Line-like GeV Excess in Fermi Blazar 4FGL J1754.2+3212: Implications for Jet Physics and Beyond

arXiv:2609.28303 · astro-ph.HE · Submitted 2026-09-23 · Read on arXiv

astro-ph.HE

Submitted: 2026-09-23

Updated: 2026-09-23

Comments: 8 pages, 3 figures, 1 table, Comments are welcome!

Code: https://github.com/physicsranger/make4FGLxml

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• AGN — 5× in this paper
• Large Area Telescope — 2× in this paper
• Verification — 1× in this paper · explained in 2 episodes

Sources

• Fermi Large Area Telescope Fourth Source Catalog Data Release 4 (4FGL-DR4)
• Setting limits on blazar-boosted dark matter with xenon-based detectors
• Dark Matter
• Evidence for a $\sim 43$ GeV $\gamma$-ray line signal in a stacking analysis of the Virgo, Fornax, and Ophiuchus Galaxy clusters
• Probing Light Dark Matter through Cosmic-Ray Cooling in Active Galactic Nuclei
• A Tentative Double Excess in the Gamma-Ray Spectrum of the Fermi Blazar 4FGL J0604.9-0000
• A Universal 1.5 GeV Gamma-Ray Line in Active Galactic Nuclei

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