T. Hassan (Author), Saptashwa Bhattacharyya (Author), B. Marčun (Author), Judit Pérez Romero (Author), Samo Stanič (Author), Veronika Vodeb (Author), Serguei Vorobiov (Author), Gabrijela Zaharijas (Author), Marko Zavrtanik (Author), Danilo Zavrtanik (Author), Miha Živec (Author)

Abstract

The Cherenkov Telescope Array (CTA) will be the next-generation observatory in the field of very-high-energy (20 GeV to 300 TeV) gamma-ray astroparticle physics. Classically, data analysis in the field maximizes sensitivity by applying quality cuts on the data acquired. These cuts, optimized using Monte Carlo simulations, select higher quality events from the initial dataset. Subsequent steps of the analysis typically use the surviving events to calculate one set of instrument response functions (IRFs). An alternative approach is the use of event types, as implemented in experiments such as the Fermi-LAT. In this approach, events are divided into sub-samples based on their reconstruction quality, and a set of IRFs is calculated for each sub-sample. The sub-samples are then combined in a joint analysis, treating them as independent observations. This leads to an improvement in performance parameters such as sensitivity, angular and energy resolution. Data loss is reduced since lower quality events are included in the analysis as well, rather than discarded. In this study, machine learning methods will be used to classify events according to their expected angular reconstruction quality. We will report the impact on CTA high-level performance when applying such an event-type classification, compared to the classical procedure.

Keywords

very-high energy gamma-rays;Cherenkov Telescope Array;

Data

Language: English
Year of publishing:
Typology: 1.06 - Published Scientific Conference Contribution (invited lecture)
Organization: UNG - University of Nova Gorica
UDC: 539.1
COBISS: 164822019 Link will open in a new window
ISSN: 1824-8039
Views: 94
Downloads: 3
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Other data

Type (COBISS): Not categorized
Pages: str. 1-15
Chronology: 2022
ID: 19945506
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