Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 58: Gamma astronomy I

T 58.8: Vortrag

Mittwoch, 17. März 2021, 17:55–18:10, Th

Data Volume Reduction for the LST Prototype — •Jonas Hackfeld for the CTA collaboration — Institute for theoretical physics IV, Ruhr-University Bochum, Germany

The prototype of the Large Size Telescope (LST) of the Cherenkov Telescope Array (CTA), which is going to be the next-generation 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 Size Telescopes (MST) are planned, which together will form the northern array CTA-N. 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 low level data volume reduction 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 background, so that the physics are impacted as minimally as possible during subsequent reconstruction. In this talk, pixel selection algorithms and their impact on higher data level analysis will be presented.