Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 13: Cosmic Rays I

T 13.6: Vortrag

Montag, 15. März 2021, 17:20–17:35, Tm

A new end-to-end calibration of the fluorescence detector of the Pierre Auger Observatory — •Christoph Schäfer for the Pierre Auger collaboration — Institute for Astroparticle Physics, Karlsruhe Institute of Technology (KIT)

A crucial part of the Pierre Auger Observatory is the fluorescence detector composed of 27 large-aperture wide-angle Schmidt telescopes. In the past, the absolute calibration of these fluorescence telescopes was performed with a large-diameter light-source, which illumines the whole aperture of one telescope at once, roughly once every three years, while a relative calibration is performed every night. In this contribution a new technique for an absolute end-to-end calibration of the fluorescence telescopes is presented. This new technique employs a calibrated portable Lambertian light-source which scans across the aperture of each telescope. The analysis of the readout of the PMT camera at each position of the light source provides an absolute calibration of the telescope. We will give a brief overview of this novel calibration method and its current status, as well as preliminary results from the measurement campaigns performed so far.