S. Sehgal

Scaler Rates from the Pierre Auger Observatory: A New Proxy of Solar Activity

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

Abstract The modulation of low-energy galactic cosmic rays reflects interplanetary magnetic field variations and can provide useful information on solar activity. An array of ground-surface detectors can reveal the secondary particles, which originate from the interaction of cosmic rays with the atmosphere. …

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The Distribution of Ultrahigh-energy Cosmic Rays along the Supergalactic Plane Measured at the Pierre Auger Observatory

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

Abstract Ultrahigh-energy cosmic rays are known to be mainly of extragalactic origin, and their propagation is limited by energy losses, so their arrival directions are expected to correlate with the large-scale structure of the local Universe. In this work, we investigate the …

Search for the Anomalous Events Detected by ANITA Using the Pierre Auger Observatory

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

A dedicated search for upward-going air showers at zenith angles exceeding 110° and energies E>0.1 EeV has been performed using the Fluorescence Detector of the Pierre Auger Observatory. The search is motivated by two "anomalous" radio pulses observed by the ANITA flights …

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The Pierre Auger Observatory open data

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

Abstract The Pierre Auger Collaboration has embraced the concept of open access to their research data since its foundation, with the aim of giving access to the widest possible community. A gradual process of release began as early as 2007 when 1% …

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Energy Spectrum of Ultrahigh-Energy Cosmic Rays across Declinations − 90 ° to + 44.8 ° as Measured at the Pierre Auger Observatory

A. 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 $-90^\circ \leqδ\leq +44.8^\circ$ using data from $\sim 310{,}000$ events accrued at the Pierre Auger Observatory from an exposure of $(104{,}900\pm 3{,}100)$ km$^2\,$sr$\,$yr. No significant variations of …

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Measuring the muon content of inclined air showers using AERA and the water-Cherenkov detectors of the Pierre Auger Observatory

P. Abreu, M. Aglietta, I. Allekotte, Kévin Almeida Cheminant et autres

Abdul Halim, A.; Abreu, P.; Aglietta, M.; Allekotte, I.; Almeida Cheminant, K.; Almela, A.; Aloisio, R.; Alvarez-Muñiz, J.; Ambrosone, A.; Ammerman Yebra, J.; Anastasi, G. A.; Anchordoqui, L.; Andrada, B.; Andrade Dourado, L.; Andringa, S.; Apollonio, L.; Aramo, C.; Arnone, E.; Arteaga …

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Large-scale Cosmic-ray Anisotropies with 19 yr of Data from the Pierre Auger Observatory

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

Abstract Results are presented for the measurement of large-scale anisotropies in the arrival directions of ultra–high-energy cosmic rays detected at the Pierre Auger Observatory during 19 yr of operation, prior to AugerPrime, the upgrade of the observatory. The 3D dipole amplitude and …

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Search for photons above 1018 eV by simultaneously measuring the atmospheric depth and the muon content of air showers at the Pierre Auger Observatory

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

The Pierre Auger Observatory is the most sensitive instrument to detect photons with energies above 1017 eV . It measures extensive air showers generated by ultrahigh energy cosmic rays using a hybrid technique that exploits the combination of a fluorescence detector with …

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Measurement of the Depth of Maximum of Air-Shower Profiles with energies between $\mathbf{10^{18.5}}$ and $\mathbf{10^{20}}$ eV using the Surface Detector of the Pierre Auger Observatory and Deep Learning

M. Aglietta, I. Allekotte, Kévin Almeida Cheminant, A. Almela et autres

We report an investigation of the mass composition of cosmic rays with energies from 3 to 100 EeV (1 EeV=$10^{18}$ eV) using the distributions of the depth of shower maximum $X_\mathrm{max}$. The analysis relies on ${\sim}50,000$ events recorded by the Surface Detector …

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Inference of the Mass Composition of Cosmic Rays with Energies from 1018.5 to 1020 eV Using the Pierre Auger Observatory and Deep Learning

Abdul Halim, A. [Adelaide U.]; Abreu, P. [LIP, Lisbon]; Aglietta, M. [OATo, Turin; INFN, Turin]; Allekotte, I. [Centro Atomico Bariloche]; Cheminant, K. Almeida [NIKHEF, Amsterdam; Vrije U., Amsterdam; Nijmegen U., IMAPP; Cracow, INP]; Almela, A. [ITeDA, Buenos Aires; U. Tech. Natl., Argentina]; Alo, P. Abreu, M. Aglietta, I. Allekotte et autres

We present measurements of the atmospheric depth of the shower maximum $X_\mathrm{max}$, inferred for the first time on an event-by-event level using the Surface Detector of the Pierre Auger Observatory. Using deep learning, we were able to extend measurements of the $X_\mathrm{max}$ …

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Design and implementation of the AMIGA embedded system for data acquisition

A. Aab, P. Abreu, M. Aglietta, Justin M. Albury et autres

Abstract The Auger Muon Infill Ground Array (AMIGA) is part of the AugerPrime upgrade of the Pierre Auger Observatory. It consists of particle counters buried 2.3 m underground next to the water-Cherenkov stations that form the 23.5 km2 large infilled array. The …

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The FRAM robotic telescope for atmospheric monitoring at the Pierre Auger Observatory

A. Aab, P. Abreu, M. Aglietta, I. Allekotte et autres

FRAM (F/Photometric Robotic Atmospheric Monitor) is a robotic telescope operated at the Pierre Auger Observatory in Argentina for the purposes of atmospheric monitoring using stellar photometry. As a passive system which does not produce any light that could interfere with the observations …

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