Chasing Gravitational Waves and Gamma-Ray Bursts with the Cherenkov Telescope Array Observatory

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