Search for Cosmic Rays in GRANDProto300
Abstract
GRANDProto300 is a prototype array of the GRAND experiment, designed to validate the technique of autonomous radio-detection of astroparticles by detecting cosmic rays with energies between 1017 − 1018.5 eV. This observation will further enable the study of the Galactic-to-extragalactic source transition region. Between November 2024 and June 2025, 46 antennas were operational, and since July 2025, 63 antennas have been collecting data stably. We present here our cosmic-ray search pipeline, that involves several filtering steps: (1) exclusion of clustered (in time and space) noise events, (2) polarization cut, (3) zenith arrival cut, and (4) delay in expected trigger cut. The efficiency is evaluated on the latest batch of data from July 2025 to October 2025. Additionally, we present an identification layer that is being developed: a CNN-based algorithm to discriminate between noise and cosmic-ray signals, using signal traces. We present the accuracy of our model, trained both on simulations and on real cosmic-ray signal datasets.
Related
- Reconstruction of very inclined air showers with radio data and application to the first GRANDProto300 cosmic-ray candidates
- Iron Nuclei with Energy of 10^19 eV in Extragalactic Cosmic Rays Near Earth
- From DAMPE to LHAASO: Rigidity Scales and Composition Changes in Galactic Cosmic Rays
- Possible Sources of Iron Nuclei in Ultra-High-Energy Cosmic Rays
- Dark-matter relay for ultra-high-energy cosmic rays
BibTeX
@misc{lavoisier2026search,
title = {{Search for Cosmic Rays in GRANDProto300}},
author = {Jolan Lavoisier and Aurélien Benoit-Lévy and Kumiko Kotera and Mauricio Bustamante and Marion Guelfand and Nathan Lebas and Takashi Sako and Xishui Tian and for the GRAND Collaboration},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.39720},
eprint = {2610.39720},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.39720},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Search for Cosmic Rays in GRANDProto300
AU - Jolan Lavoisier
AU - Aurélien Benoit-Lévy
AU - Kumiko Kotera
AU - Mauricio Bustamante
AU - Marion Guelfand
AU - Nathan Lebas
AU - Takashi Sako
AU - Xishui Tian
AU - for the GRAND Collaboration
PY - 2026
DA - 2026/10/29
PB - arXiv
DO - 10.48550/arxiv.2610.39720
UR - https://arxiv.org/abs/2610.39720
AB - GRANDProto300 is a prototype array of the GRAND experiment, designed to validate the technique of autonomous radio-detection of astroparticles by detecting cosmic rays with energies between 10^17 − 10^18.5 eV. This observation will further enable the study of the Galactic-to-extragalactic source transition region. Between November 2024 and June 2025, 46 antennas were operational, and since July 2025, 63 antennas have been collecting data stably. We present here our cosmic-ray search pipeline, that involves several filtering steps: (1) exclusion of clustered (in time and space) noise events, (2) polarization cut, (3) zenith arrival cut, and (4) delay in expected trigger cut. The efficiency is evaluated on the latest batch of data from July 2025 to October 2025. Additionally, we present an identification layer that is being developed: a CNN-based algorithm to discriminate between noise and cosmic-ray signals, using signal traces. We present the accuracy of our model, trained both on simulations and on real cosmic-ray signal datasets.
ER -