I have co-led the CTAO consortium effort leading to a detailed investigation into the sensitivity of the upcoming Cherenkov Telescope Array Observatory (CTAO) to gamma-ray bursts associated with gravitational waves detections. The recently published publication "Chasing Gamma-Ray Signals from Binary Neutron Star Coalescences with the Cherenkov Telescope Array: Prospects and Observing Strategies" utilizes the open-source software tilepy, that has been developed within my team, to obtain optimal observation plan to cover the relatively large localisation regions provided by the gravitational wave interferometers with CTAO follow-up observations. Simulating the expected very-high-energy gamma ray emission of a vast population of syntetic GW-GRB associations, the work provides crucial benchmarks for the number of detectable events and demonstrates that the CTAO will be significantly more effective than current-generation telescopes in uncovering the (sub-)TeV emission mechanisms of these transient cosmic sources.

Publication: S. Abe et al. (CTAO consortium), 2026, "Chasing Gamma-Ray Signals from Binary Neutron Star Coalescences with the Cherenkov Telescope Array: Prospects and Observing Strategies", accepted by ApJ, arXiv: 2604.08748

In a seperate effort, a similar procedure (again including tilepy as central scheduling tool) has been applied to GRBs that are being detected by instruments providing only rough localisations (e.g. Fermi-GBM). The increased sensitivity and field-of-view provide promising prospects for CTAO detections. 
Publication: S. Macera et al., 2026, "Detection of TeV emission during early afterglow from poorly localized GRBs with ground based IACTs", arXiv: 2604.07582

The H.E.S.S. (High Energy Stereoscopic System) collaboration has reached a major milestone in transient astrophysics with the publication of its first comprehensive Gamma-Ray Burst (GRB) catalog. Synthesizing over a decade and a half of observations, this landmark study provides a population-level analysis of more than 100 events observed at very-high-energy (VHE) scales.Led by Mathieu de Bony, a MOTS postdoc at IRFU, CEA Paris-Saclay, the research offers a definitive look at how ground-based Cherenkov telescopes detect the universe's most violent explosions. By comparing H.E.S.S. data with satellite observations from Fermi and Swift, the study illuminates the physical conditions—specifically extreme brightness and relative proximity—required for a burst to be visible in the VHE band.
A key finding of the publication is the precise definition of the "cosmic horizon." This boundary is created by Extragalactic Background Light (EBL), which absorbs distant gamma rays as they travel through space. The catalog confirms that while EBL limits how far we can see, VHE emission is likely a universal feature of GRB afterglows, providing a new roadmap for understanding particle acceleration in cosmic jets.

Further information: https://hess-experiment.eu/2026/04/HESS-SOM30804/
Publication: A. Acharyya et al. (H.E.S.S. Collaboration), 2026, “The second H.E.S.S. gamma-ray burst catalogue: 15 years of observations with the H.E.S.S. telescopes”, Astronomy & Astrophysics 707, A382.