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T: Fachverband Teilchenphysik

T 61: Methods of astroparticle physics IV

T 61.7: Vortrag

Mittwoch, 1. April 2020, 18:00–18:15, L-3.001

Status of the Imaging Air-Cherenkov Telescopes HAWC's Eye at the HAWC Gamma-Ray Observatory — •Giang Do¹, Jan Audehm¹, Thomas Bretz¹, Florian Rehbein¹, Merlin Schaufel², and Adrianna García¹ — ¹III. Physics Institute 3A, RWTH Aachen, Germany — ²III. Physics Institute 3B, RWTH Aachen, Germany

The imaging air-Cherenkov telescope HAWC's Eye has been developed in order to improve the energy and angular resolution of extensive air shower arrays. Hybrid observations can improve the reconstruction of the air shower by combining the ground-based detectors and the air-Cherenkov telescopes. The combination of both techniques allows to measure not only the fraction of the shower at ground level but also the shower development. In summer 2017, the first telescope prototype featuring a 50 cm Fresnel lens and a camera with 61 silicon photomultipliers (SiPMs) was commissioned at the site of the High-Altitude Water Cherenkov Gamma-Ray Observatory (HAWC) located in the state of Puebla, Mexico. For the first time, hybrid data was recorded. By using the shower reconstruction of HAWC, the telescope was characterized and calibrated without simulations. In October 2019, two telescopes with upgraded hexagonal light collectors and a new type of SiPMs were successfully installed and operated in stereo mode, promising a better performance. Based on first measurements, the performance of the improved telescopes is evaluated.