GCN Circular 35068
The MAGIC telescopes observed GRB 231115A (RA:09:56:00.22, Dec:+69:40:48.00), a candidate Magnetar Giant Flare from M82 (GCN 35044) after the alert issued by INTEGRAL (GCN/INTEGRAL NOTICE 10427). The observations in the very-high-energy (VHE; >100 GeV) range were performed on the night of November 15th starting at ~T0+8h, for about 2 hours, at large zenith angles. The fast and preliminary analysis does not show any significant detection (<2 sigma) above 250 GeV. The preliminary integral flux upper limit (95% confidence level) at 300 GeV is 8e-12 cm-2 s-1. The contact persons for the MAGIC collaboration are Alicia López-Oramas (email@example.com), Alessandra Lamastra (firstname.lastname@example.org) and Giuseppe Silvestri (email@example.com). MAGIC is a system of two 17m-diameter Imaging Atmospheric Cherenkov Telescopes located at the Observatory Roque de Los Muchachos of the Instituto de Astrofísica de Canarias (IAC) on the Canary island of La Palma, Spain (https://magic.mpp.mpg.de).