Speaker
Description
The quest for PeVatrons, sources of galactic cosmic rays accelerated up to PeV energies, has lived exciting developments in the last years, thanks to the many gamma-ray sources detected by ground array experiments at energies above 100 TeV. Among these, the supernova remnant SNR G106.3+2.7 appears to be one of the most promising hadronic PeVatron candidates, for which the ultra-high energy emission (UHE, E > 100 TeV) can be hardly explained with a simple leptonic emission scenario. The interest in this source has been recently validated by the first LHAASO catalogue, which confirms the presence of a highly significant source above 100 TeV inside the radio contour of SNR G106.3+2.7.
Imaging Atmospheric Cherenkov Telescopes (IACTs) are ideal instruments to investigate the nature of the most energetic sources of gamma-rays in the Universe thanks to their optimal angular and energy resolution compared to UHE detectors. Using the LST-1, the Large-Sized Telescope prototype of the Cherenkov Telescope Array Observatory, with its two neighbours IACTs of the MAGIC experiment, we have been observing the SNR G106.3+2.7 at Large Zenith Angles (LZA), which allows us to explore the 1-50 TeV region of the energy spectrum.
Such observations raise challenges for data reconstruction and analysis, due to the strong dependence on the zenith angle of the image properties for LZA observations. In this contribution, we will present the first combined analysis of all the data obtained with each instrument during the current observation campaign, including a preliminary study of the energy-dependent morphology of the source in gamma-rays.
