Marta Bianciotto

Probing the Flux of Ultra-High-Energy Neutral Particles at the Pierre Auger Observatory

Fiona H. Ellwanger, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres

The Pierre Auger Observatory, the largest facility for detecting ultra-high-energy cosmic rays (UHECRs), enables detailed studies of extensive air showers over a wide energy range, from 50\,PeV up to and beyond 100\,EeV. Its hybrid design, combining a surface detector array, fluorescence detector, …

Observation of the Moon and Sun shadows with cosmic rays at an average energy of $\text{7}{\times}\text{10}^\text{17}\,$eV

Adila Abdul Halim, Pedro Abreu, Marco Aglietta, Mulan Ahmed et autres

International audience

Long-term monitoring of the optical performance of the primary mirrors at the Coihueco and Loma Amarilla sites of the Pierre Auger Observatory

Adila Abdul Halim, P. Abreu, M. Aglietta, M. Ahmed et autres

Abstract This paper presents the results of an optical performance monitoring campaign for the primary mirrors installed in fluorescence telescopes at the Coihueco and Loma Amarilla sites at the Pierre Auger Observatory in Argentina. Since the end of 2003, this effort has …

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Bounds on Lorentz Invariance Violation from Muon Fluctuations at the Pierre Auger Observatory

Adila Abdul Halim, P. Abreu, M. Aglietta, I. Allekotte et autres

Quantum gravity theories often modify spacetime symmetries. In particular, Lorentz invariance may be violated when approaching the Planck scale. Although the scales at which interactions occur in extensive air showers induced by ultra-high-energy cosmic rays in the atmosphere are many orders of …

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Search for Ultra-high-energy Neutrons from Galactic Sources with the Pierre Auger Observatory

Adila Abdul Halim, P. Abreu, M. Aglietta, I. Allekotte et autres

Abstract Deflections in the propagation of charged ultra-high-energy cosmic rays (UHECRs) caused by magnetic fields make the identification of their sources challenging. On the other hand, the arrival directions at Earth of neutrons point directly to their origin. The emission of UHECRs …

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Inference of the Mass Composition of Cosmic Rays with energies between 3 and 100 EeV using the data of the Pierre Auger Observatory and Deep Learning

Berenika Čermáková, Adila Abdul Halim, Pedro Abreu, Marco Aglietta et autres

Located in Argentina, the Pierre Auger Observatory is the largest cosmic-ray observatory on Earth. The Observatory is a hybrid detector employing different detection principles to observe multiple components of air showers. The core part of the detector is the Surface Detector (SD), …

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Depth of Maximum of Air-Shower Profiles above 10^17.7 eV Measured with the Fluorescence Detector of the Pierre Auger Observatory

Adila Abdul Halim, Pedro Abreu, Marco Aglietta, Mulan Ahmed et autres

International audience

Exploring the Ultra-High-Energy Universe: Highlights from the Pierre Auger Observatory

M. Roth, Adila Abdul Halim, P. Abreu, M. Aglietta et autres

The Pierre Auger Observatory is the world’s largest facility dedicated to studying ultra-high-energy cosmic rays (UHECRs). Located in Argentina, it spans 3,000 square kilometers and utilizes a hybrid detection system comprising over 1,600 Water-Cherenkov detectors and fluorescence telescopes. Since its inception in …

Long-term calibration and validation of stability of the Auger Engineering Radio Array using the diffuse Galactic radio emission

The Pierre Auger Collaboration, A. Abdul Halim, P. Abreu, M. Aglietta et autres

The Auger Engineering Radio Array (AERA) measures radio emission from high-energy extensive air showers. Consisting of 153 autonomous radio-detector stations spread over $17$\,km$^2$, it detects radio waves in the frequency range of $30$ to $80$\,MHz. Accurate characterization of the detector response is …

Long-term calibration and validation of stability of the Auger Engineering Radio Array using the diffuse Galactic radio emission

Adila Abdul Halim, P. Abreu, M. Aglietta, I. Allekotte et autres

Abstract The Auger Engineering Radio Array (AERA) measures radio emission from high-energy extensive air showers. Consisting of 153 autonomous radio-detector stations spread over 17 km^2, it detects radio waves in the frequency range of 30 to 80 MHz. Accurate characterization of the …

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Energy Spectrum of Ultrahigh-Energy Cosmic Rays across Declinations − 9 0 ° to + 44.8 ° as Measured at the Pierre Auger Observatory

Adila Abdul Halim, P. Abreu, M. Aglietta, I. Allekotte et autres

The energy spectrum of cosmic rays above 2.5 EeV has been measured across the declination range -90°≤δ≤+44.8° using ∼310 000 events accrued at the Pierre Auger Observatory from an exposure of (104 900±3 100) km^{2} sr yr. No significant variations of energy …

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Scaler data from the Pierre Auger Observatory as a proxy of solar activity

C. Taricco, Adila Abdul Halim, P. Abreu, M. Aglietta et autres

Solar activity variations strongly impact the modulation of the flux of low-energy Galactic Cosmic Rays (GCRs) reaching the Earth. The secondary particles, which originate from the interaction of GCRs with the atmosphere, can be revealed by an array of ground detectors. We …

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