Speaker
Description
Explosive transients, such as core-collapse supernovae (CCSNe) and tidal disruption events (TDEs), are among the most energetic phenomena in the universe and are prime candidates for efficient particle acceleration up to very-high-energies (VHE; E>100 GeV).
The joint configuration of the Cherenkov Telescope Array Observatory’s (CTAO) first Large-Sized Telescope (LST-1) and the Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescopes offers unparalleled sensitivity in the tens of GeV to TeV energy range, providing a unique window into the non-thermal processes of these events.
In this contribution, I will present results from two of the latest VHE observational campaigns conducted for explosive transient sources:
SN 2023ixf: One of the closest and brightest CCSNe discovered to date. I will present the observations and preliminary results from the most extensive observational campaign ever conducted at VHE for a CCSN, spanning between 2 and 420 days post-explosion. I will discuss current models of gamma-ray emission from CCSNe and explore how the non-detection of SN 2023ixf constrains the supernova environment and particle acceleration efficiency, providing guidance for future observational strategies, with particular emphasis on multi-wavelength approaches.
TDE 2025aarm: The second closest TDE reported to date (z=0.0136). I will present the deepest and earliest TDE observation campaign conducted with Cherenkov telescopes, totaling approximately 11 hours with LST-1 and 30 hours with MAGIC, covering both the opaque and transparent emission phases relative to the optical peak. I will discuss additional constraints for the non-thermal emission in light of a broad multiwavelength dataset collected for TDE2025aarm.
Authors: A. Simongini, M. Kherlakian, A. Lopéz-Oramas, A. Aguasca-Cabot,S. Inoue, V. Barbosa Martins, A. Carosi, G. Pirola, P. Cristofari, F. Acero, on behalf of the CTAO-LST and MAGIC collaborations.
