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astro-ph.HE2026

Early results from the SVOM Observatory Science program

A. Coleiro, L. Tao, F. Cangemi +44

We present the organisation and early results from the Observatory Science program of the Space-based multi-band astronomical Variable Objects Monitor (SVOM), based on data collect…

astro-ph.HE2026

First Gamma-Ray Burst Observations with SVOM

F. Daigne, D. Turpin, J. -L. Atteia +34

Following its launch on 22 June 2024, the Space-based multi-band astronomical Variable Objects Monitor (SVOM) successfully completed its flight acceptance, commissioning, and scien…

astro-ph.HE2026

Extreme PeV accelerator associated with GRS 1915+105

Zhen Cao, F. Aharonian, Y. X. Bai +322

Microquasars, binary systems featuring relativistic jets, have emerged as sources for particle acceleration beyond PeV energies. We present a study of the broadband -ray emissi…

astro-ph.HE2026

Gamma-Ray Constraints on Heavy Axion-Like-Particle Decays from Fermi-LAT and H.E.S.S. Blazar Spectra

A. Acharyya, F. Aharonian, M. Backes +117

The propagation of very-high-energy (VHE; GeV) gamma rays from extragalactic sources is affected by interactions with photons of the extragalactic background light…

astro-ph.HE2026

TAMBO: A Novel Neutrino Telescope for High-Energy Astrophysical Neutrino Detection

P. Zhelnin, J. Dacpano, C. Argüelles

The detection of astrophysical neutrino point sources remains challenging due to atmospheric backgrounds obscuring signal and statistical penalties from the look-elsewhere effect.…

astro-ph.HE2026

Detection of the distant quasar OP 313 with the first Large-Sized Telescope of CTAO

K. Abe, S. Abe, J. Abhir +412

In December 2023, the Large-Sized Telescope prototype (LST-1) detected for the first time VHE -ray emission from the FSRQ OP~313 becoming the furthest blazar ever observed at V…