Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 17: Gamma Astronomy 1

T 17.4: Vortrag

Montag, 21. März 2022, 17:05–17:20, T-H30

Data Volume Reduction for the Cherenkov Telescope Array’s Large-Sized Telescope Prototype — •Jonas Hackfeld for the CTA collaboration — Institute for theoretical physics IV, Ruhr-University Bochum, Germany

The prototype of the Large-Sized Telescope (LST) of the Cherenkov Telescope Array (CTA), which is going to be the next-generation very-high energy (> 20 GeV) gamma-ray observatory, was inaugurated in October 2018 and has already observed several bright gamma-ray sources during its commissioning phase. For the next years, in addition to 3 more LSTs, several Medium-Sized Telescopes (MST) are planned, which together will equip the northern site of the CTA Observatory. Due to the locally limited data transfer rates and the technical and economic effort to store data quantities of ∼ 100 PByte/year permanently over a planned duration of ∼ 30 years, a volume reduction for low level data is inevitable. In addition to lossless compression methods for volume reduction, there are lossy methods such as pixel selection. In this process, the pixels with signal are isolated from the night-sky background ones, so that the physics results are impacted as minimally as possible during subsequent event reconstruction. In this talk, pixel selection algorithms and their impact on higher level data analysis will be presented.

This project is funded via BMBF Verbundforschung, Project 05A20PC1