Speaker
Description
In addition to their gamma-ray observations in the very high energy regime (20 GeV - 100 TeV), the two 17-m MAGIC telescopes are ideal instruments for optical stellar intensity interferometer (SII), and have been routinely performing observations in SII mode for the last six years. The calibration and validation of the setup, alongside the first measurement of the stellar angular diameter of 13 massive stars, were published in a performance paper in early 2024. In parallel, a similar upgrade as the one implemented for MAGIC were applied to the first Large-Sized Telescope (LST-1) of the Cherenkov Telescope Array Observatory northern hemisphere array (CTAO-North), a 23-m diameter telescope located
next to MAGIC. First SII observations using the MAGIC+LST-1 array have been successful, and are now routinely performed in 2025. Three more LSTs will be completed by 2026. This presentation will provide a summary of the MAGIC+LST1 system, current and future correlator capabilities, show prospects for its performance and briefly discuss about some of the science topics the collaboration is currently pursuing.
