PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - GAI - Gamma Ray Indirect
Prototype Open Event Reconstruction Pipeline for the Cherenkov Telescope Array
M. Noethe*, K. Kosack, L. Nickel, M. Peresano  on behalf of the CTA Consortium
Full text: pdf
Pre-published on: July 28, 2021
Published on: March 18, 2022
The Cherenkov Telescope Array (CTA) is the next-generation gamma-ray observatory
currently under construction.
It will improve over the current generation of imaging atmospheric Cherenkov telescopes (IACTs)
by a factor of five to ten in sensitivity and it will be able to observe the whole sky from a combination of two sites:
a northern site in La Palma, Spain, and a southern one in Paranal, Chile.
CTA will also be the first open gamma-ray observatory.
Accordingly, the data analysis pipeline is developed as open-source software.
The event reconstruction pipeline accepts raw data of the telescopes and processes it to
produce suitable input for the higher-level science tools.
Its primary tasks include reconstructing the physical properties of each recorded
shower and providing the corresponding instrument response functions.

ctapipe is a framework providing algorithms and tools to facilitate raw data calibration,
image extraction, image parameterization and event reconstruction.
Its main focus is currently the analysis of simulated data but it has also been successfully applied
for the analysis of data obtained with the first CTA prototype telescopes, such as the Large-Sized Telescope 1 (LST-1).

pyirf is a library to calculate IACT instrument response functions,
needed to obtain physics results like spectra and light curves,
from the reconstructed event lists.

Building on these two, protopipe is a prototype for the event reconstruction pipeline for CTA.
Recent developments in these software packages will be presented.
DOI: https://doi.org/10.22323/1.395.0744
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