Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 58: Gamma astronomy I

T 58.4: Vortrag

Mittwoch, 17. März 2021, 16:50–17:05, Th

The MAM telescope subsystem of MAGIC as a monitor for atmospheric transmission — •Marine Pihet, Jürgen Besenrieder, and Razmik Mirzoyan for the MAGIC collaboration — Max Planck Institute for Physics, Munich

Monitoring of atmospheric transmission is a crucial part for the measurement and analysis of data from Imaging Atmospheric Cherenkov Telescopes like the MAGIC telescopes, located at the Roque de los Muchachos European Northern Observatory on the Canary Island of La Palma. It is especially important when searching for PeVatron candidate sources emitting gamma rays above 10TeV by using the very large zenith angle (VLZA) observation technique. The latter significantly increases the collection area and as a result increases the detection rate of gamma rays by the MAGIC telescopes at the highest energies. In this report, we present the current work on the MAGIC Atmosphere Minion (MAM) telescope as an optical subsystem of MAGIC for atmospheric monitoring. It includes a 5-inch and an 11-inch optical telescope with a CMOS and a CCD camera respectively, a filter wheel, and a spectrograph, attached to the 11-inch. All these are mounted on a precision drive system and enclosed in the 2.5 m size high-quality dome from Baader, located just next to the MAGIC-I telescope. We developed a concept for photometric measurements of transmission with MAM at VLZA using aperture photometry and tested it in November 2020. Results from the photometric calibration of the subsystem and recent progress are presented, along with the planned work on improvements and anticipated long term goals.