Intensity interferometry with the MAGIC telescopes

Discussion timeslot (ZOOM-Meeting): 16. July 2021 - 18:00
ZOOM-Meeting URL: https://icrc2021.desy.de/pf_access_abstracts
Corresponding Session: https://icrc2021-venue.desy.de/channel/Presenter-Forum-1-Evening-All-Categories/48
Abstract:
'Due to their large mirror size, fast response to single photons, sensitivity and telescope baselines in the order of 100 m, Imaging Atmospheric Cherenkov Telescopes are ideally suited to make intensity interferometry observations. In 2019 a test readout setup was installed in the two 17-m diameter MAGIC telescopes to allow performing interferometry measurements with them. The first on-sky measurements were able to detect correlated intensity fluctuations consistent with the stellar diameters of three different stars: Adhara ($epsilon$ CMa), Benetnasch ($eta$ UMa) and Mirzam ($beta$ CMa). After the upgrade of the setup in 2021, MAGIC is now equipped with a high duty cycle intensity interferometer, already in operation. A technical description of the interferometer and first results of several known and yet unknown stellar diameter measurements are presented.'

Authors: Carlos Delgado | For the MAGIC Collaboration
Co-Authors: Nicolas Produit | Roland Walter | Daniel Guberman | Luca Zampieri | Michele Fiori | Miguel Polo | Carlos Diaz | Salvatore Mangano
Collaboration: MAGIC

Indico-ID: 136
Proceeding URL: https://pos.sissa.it/395/693