Performance of a proposed event-type based analysis for the Cherenkov Telescope Array
Hassan, T. ; Gueta, O. ; Maier, G. ; Nöthe, M. ; Peresano, M. ; Vovk, I. ; Carlile, C. LU ; Dravins, D. LU
and Zmija, A.
(2022)
37th International Cosmic Ray Conference
In Proceedings of Science
395.
- 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... (More)
- 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. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0) (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/753ef790-1f4f-4a48-a383-fa95af44c27d
- author
- Hassan, T.
; Gueta, O.
; Maier, G.
; Nöthe, M.
; Peresano, M.
; Vovk, I.
; Carlile, C.
LU
; Dravins, D.
LU
and Zmija, A.
- author collaboration
- organization
- publishing date
- 2022
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Cosmology, Gamma rays, Germanium alloys, Germanium compounds, Intelligent systems, Learning systems, Quality control, Telescopes, Tellurium compounds, Astroparticle physics, Cherenkov telescope arrays, Event Types, Gamma-rays, Instrument response functions, Performance, Reconstruction quality, Sub-samples, Type-based analysis, Very high energies, Monte Carlo methods
- host publication
- 37th International Cosmic Ray Conference (ICRC2021) - GAI - Gamma Ray Indirect
- series title
- Proceedings of Science
- volume
- 395
- article number
- 752
- conference name
- 37th International Cosmic Ray Conference
- conference location
- Berlin, Germany
- conference dates
- 2021-07-12 - 2021-07-23
- external identifiers
-
- scopus:85145022346
- ISSN
- 1824-8039
- DOI
- 10.22323/1.395.0752
- language
- English
- LU publication?
- yes
- id
- 753ef790-1f4f-4a48-a383-fa95af44c27d
- date added to LUP
- 2023-01-16 09:53:00
- date last changed
- 2024-04-03 18:13:30
@inproceedings{753ef790-1f4f-4a48-a383-fa95af44c27d,
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. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)}},
author = {{Hassan, T. and Gueta, O. and Maier, G. and Nöthe, M. and Peresano, M. and Vovk, I. and Carlile, C. and Dravins, D. and Zmija, A.}},
booktitle = {{37th International Cosmic Ray Conference (ICRC2021) - GAI - Gamma Ray Indirect}},
issn = {{1824-8039}},
keywords = {{Cosmology; Gamma rays; Germanium alloys; Germanium compounds; Intelligent systems; Learning systems; Quality control; Telescopes; Tellurium compounds; Astroparticle physics; Cherenkov telescope arrays; Event Types; Gamma-rays; Instrument response functions; Performance; Reconstruction quality; Sub-samples; Type-based analysis; Very high energies; Monte Carlo methods}},
language = {{eng}},
series = {{Proceedings of Science}},
title = {{Performance of a proposed event-type based analysis for the Cherenkov Telescope Array}},
url = {{http://dx.doi.org/10.22323/1.395.0752}},
doi = {{10.22323/1.395.0752}},
volume = {{395}},
year = {{2022}},
}