Wyniki wyszukiwania dla: A. Lopez Agüera

Pozycje od 1 do 20 spośród 34 wyników

Poprzednia

Następna

artykuł

Validation of a global horizontal irradiation assessment from a numerical weather prediction model in the south of Sonora–Mexico

Ian Sosa-Tinoco, Juan Peralta-Jaramillo, Carlos Otero-Casal, A. López- Agüera, więcej

Renewable Energy > 2016 > 90 > C > 105-113

The present work illustrates the methodology followed to generate a high spatial (9 km) and high temporal resolution (10 min) global solar irradiance assessment, based on a numerical weather prediction model, for the south of Sonora region in Mexico and its validation with observational data. At the same time a comparison with an ERA-Interim output data was performed in order to determine if downscaling...

artykuł

Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory

A. Aab, P. Abreu, M. Aglietta, E. J. Ahn, więcej

The European Physical Journal C > 2015 > 75 > 6 > 1-15

Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highest-energy cosmic rays with $$E \ge 6 \times 10^{19}$$ E ≥ 6 × 10 19 eV by analyzing cosmic rays with energies above $$E \ge 5 \times 10^{18}$$ E ≥ 5 × 10 18 eV arriving within an angular separation of...

artykuł

Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America

A. Aab, P. Abreu, M. Aglietta, M. Ahlers, więcej

Atmospheric Research > 2014 > 149 > C > 120-135

The Pierre Auger Observatory is making significant contributions towards understanding the nature and origin of ultra-high energy cosmic rays. One of its main challenges is the monitoring of the atmosphere, both in terms of its state variables and its optical properties. The aim of this work is to analyse aerosol optical depth τ_a(z) values measured from 2004 to 2012 at the observatory, which is located...

artykuł

Identifying clouds over the Pierre Auger Observatory using infrared satellite data

P. Abreu, M. Aglietta, M. Ahlers, E.J. Ahn, więcej

Astroparticle Physics > 2013 > 50-52 > Complete > 92-101

We describe a new method of identifying night-time clouds over the Pierre Auger Observatory using infrared data from the Imager instruments on the GOES-12 and GOES-13 satellites. We compare cloud identifications resulting from our method to those obtained by the Central Laser Facility of the Auger Observatory. Using our new method we can now develop cloud probability maps for the 3000km² of the Pierre...

rozdział

Study and comparison between different battery ageing algorithms

A. Lopez Aguera, I. Rodriguez Cabo

International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion > 769 - 772

2012 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM 2012)

The prediction of batteries final failure in standalone photovoltaic systems is a quite important issue. The implementation of a simple and efficient method for such systems is mandatory for any application. The scale parameter of the discharge voltage distribution Weibull fit over time and its corresponding Root Mean Square Error (with respect to the initial distribution) evolution are proposed,...

artykuł

Erratum to “The Lateral Trigger Probability function for the Ultra-High Energy Cosmic Ray Showers detected by the Pierre Auger Observatory” [Astroparticle Physics 35 (2011) 266–276]

P. Abreu, M. Aglietta, E.J. Ahn, I.F.M. Albuquerque, więcej

Astroparticle Physics > 2012 > 35 > 10 > 681-684

artykuł

Description of atmospheric conditions at the Pierre Auger Observatory using the Global Data Assimilation System (GDAS)

P. Abreu, M. Aglietta, M. Ahlers, E.J. Ahn, więcej

Astroparticle Physics > 2012 > 35 > 9 > 591-607

Atmospheric conditions at the site of a cosmic ray observatory must be known for reconstructing observed extensive air showers. The Global Data Assimilation System (GDAS) is a global atmospheric model predicated on meteorological measurements and numerical weather predictions. GDAS provides altitude-dependent profiles of the main state variables of the atmosphere like temperature, pressure, and humidity...

artykuł

Search for signatures of magnetically-induced alignment in the arrival directions measured by the Pierre Auger Observatory

P. Abreu, M. Aglietta, E.J. Ahn, I.F.M. Albuquerque, więcej

Astroparticle Physics > 2012 > 35 > 6 > 354-361

We present the results of an analysis of data recorded at the Pierre Auger Observatory in which we search for groups of directionally-aligned events (or ‘multiplets’) which exhibit a correlation between arrival direction and the inverse of the energy. These signatures are expected from sets of events coming from the same source after having been deflected by intervening coherent magnetic fields. The...

artykuł

The Lateral Trigger Probability function for the Ultra-High Energy Cosmic Ray showers detected by the Pierre Auger Observatory

P. Abreu, M. Aglietta, E.J. Ahn, I.F.M. Albuquerque, więcej

Astroparticle Physics > 2011 > 35 > 5 > 266-276

In this paper we introduce the concept of Lateral Trigger Probability (LTP) function, i.e., the probability for an Extensive Air Shower (EAS) to trigger an individual detector of a ground based array as a function of distance to the shower axis, taking into account energy, mass and direction of the primary cosmic ray. We apply this concept to the surface array of the Pierre Auger Observatory consisting...

artykuł

Determination of ππ scattering lengths from measurement of π+π− atom lifetime

B. Adeva, L. Afanasyev, M. Benayoun, A. Benelli, więcej

Physics Letters B > 2011 > 704 > 1-2 > 24-29

The DIRAC experiment at CERN has achieved a sizeable production of π+π− atoms and has significantly improved the precision on its lifetime determination. From a sample of 21 227 atomic pairs, a 4% measurement of the S-wave ππ scattering length difference |a0−a2|=(0.2533−0.0078+0.0080|stat|syst−0.0073+0.0078)Mπ+−1 has been attained, providing an important test of Chiral Perturbation Theory.

rozdział

Solar panels for auger southern observatory: “SPIDERSHADOWS”

A. Lopez Aguera, I. Rodriguez Cabo, D. Rey, E. Vieites Montes, więcej

2011 International Conference on Clean Electrical Power (ICCEP) > 175 - 182

2011 International Conference on Clean Electrical Power (ICCEP)

During the winter of 2009, technicians of the Pierre Auger Observatory (PAO) inform about how during a visual inspection they detect failures in the surface of different solar panels. The inspection was not casual, but due to problems with the level of charge of the batteries. Because of the aspect of the failure, we will name it “spiders” (arañitas). Other anomalies, related to the expected ageing,...

artykuł

Advanced functionality for radio analysis in the Offline software framework of the Pierre Auger Observatory

P. Abreu, M. Aglietta, E.J. Ahn, I.F.M. Albuquerque, więcej

Nuclear Inst. and Methods in Physics Research, A > 2011 > 635 > 1 > 92-102

The advent of the Auger Engineering Radio Array (AERA) necessitates the development of a powerful framework for the analysis of radio measurements of cosmic ray air showers. As AERA performs “radio-hybrid” measurements of air shower radio emission in coincidence with the surface particle detectors and fluorescence telescopes of the Pierre Auger Observatory, the radio analysis functionality had to...

artykuł

Search for first harmonic modulation in the right ascension distribution of cosmic rays detected at the Pierre Auger Observatory

P. Abreu, M. Aglietta, E.J. Ahn, I.F.M. Albuquerque, więcej

Astroparticle Physics > 2011 > 34 > 8 > 627-639

We present the results of searches for dipolar-type anisotropies in different energy ranges above 2.5×10 ¹⁷ eV with the surface detector array of the Pierre Auger Observatory, reporting on both the phase and the amplitude measurements of the first harmonic modulation in the right-ascension distribution. Upper limits on the amplitudes are obtained, which provide the most stringent bounds at...

artykuł

The exposure of the hybrid detector of the Pierre Auger Observatory

P. Abreu, M. Aglietta, E.J. Ahn, D. Allard, więcej

Astroparticle Physics > 2011 > 34 > 6 > 368-381

The Pierre Auger Observatory is a detector for ultra-high energy cosmic rays. It consists of a surface array to measure secondary particles at ground level and a fluorescence detector to measure the development of air showers in the atmosphere above the array. The “hybrid” detection mode combines the information from the two subsystems. We describe the determination of the hybrid exposure for events...

artykuł

Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter

P. Abreu, M. Aglietta, E.J. Ahn, D. Allard, więcej

Astroparticle Physics > 2010 > 34 > 5 > 314-326

Data collected by the Pierre Auger Observatory through 31 August 2007 showed evidence for anisotropy in the arrival directions of cosmic rays above the Greisen–Zatsepin–Kuz’min energy threshold, 6×10 ¹⁹ eV. The anisotropy was measured by the fraction of arrival directions that are less than 3.1° from the position of an active galactic nucleus within 75Mpc (using the Véron-Cetty and Véron 12th...

artykuł

The fluorescence detector of the Pierre Auger Observatory

J. Abraham, P. Abreu, M. Aglietta, C. Aguirre, więcej

Nuclear Inst. and Methods in Physics Research, A > 2010 > 620 > 2-3 > 227-251

The Pierre Auger Observatory is a hybrid detector for ultra-high energy cosmic rays. It combines a surface array to measure secondary particles at ground level together with a fluorescence detector to measure the development of air showers in the atmosphere above the array. The fluorescence detector comprises 24 large telescopes specialized for measuring the nitrogen fluorescence caused by charged...

artykuł

Measurement of the energy spectrum of cosmic rays above 1018 eV using the Pierre Auger Observatory

J. Abraham, P. Abreu, M. Aglietta, E.J. Ahn, więcej

Physics Letters B > 2010 > 685 > 4-5 > 239-246

We report a measurement of the flux of cosmic rays with unprecedented precision and statistics using the Pierre Auger Observatory. Based on fluorescence observations in coincidence with at least one surface detector we derive a spectrum for energies above 10 ¹⁸ eV. We also update the previously published energy spectrum obtained with the surface detector array. The two spectra are combined...

artykuł

A study of the effect of molecular and aerosol conditions in the atmosphere on air fluorescence measurements at the Pierre Auger Observatory

J. Abraham, P. Abreu, M. Aglietta, C. Aguirre, więcej

Astroparticle Physics > 2010 > 33 > 2 > 108-129

The air fluorescence detector of the Pierre Auger Observatory is designed to perform calorimetric measurements of extensive air showers created by cosmic rays of above 1018eV. To correct these measurements for the effects introduced by atmospheric fluctuations, the Observatory contains a group of monitoring instruments to record atmospheric conditions across the detector site, an area exceeding 3000km...

artykuł

Erratum to “Atmospheric effects on extensive air showers observed with the surface detector of the Pierre Auger observatory” [Astroparticle Physics 32(2) (2009), 89–99]

J. Abraham, P. Abreu, M. Aglietta, C. Aguirre, więcej

Astroparticle Physics > 2010 > 33 > 1 > 65-67

artykuł

Trigger and aperture of the surface detector array of the Pierre Auger Observatory

J. Abraham, P. Abreu, M. Aglietta, E.J. Ahn, więcej

Nuclear Inst. and Methods in Physics Research, A > 2010 > 613 > 1 > 29-39

The surface detector array of the Pierre Auger Observatory consists of 1600 water-Cherenkov detectors, for the study of extensive air showers (EAS) generated by ultra-high-energy cosmic rays. We describe the trigger hierarchy, from the identification of candidate showers at the level of a single detector, amongst a large background (mainly random single cosmic ray muons), up to the selection of real...

Poprzednia

Następna

Opcje filtrowania

Data publikacji

Ustaw własny zakres dat

INFONA - portal komunikacji naukowej

Wyniki wyszukiwania dla: A. Lopez Agüera

Validation of a global horizontal irradiation assessment from a numerical weather prediction model in the south of Sonora–Mexico

Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory

Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America

Identifying clouds over the Pierre Auger Observatory using infrared satellite data

Study and comparison between different battery ageing algorithms

Erratum to “The Lateral Trigger Probability function for the Ultra-High Energy Cosmic Ray Showers detected by the Pierre Auger Observatory” [Astroparticle Physics 35 (2011) 266–276]

Description of atmospheric conditions at the Pierre Auger Observatory using the Global Data Assimilation System (GDAS)

Search for signatures of magnetically-induced alignment in the arrival directions measured by the Pierre Auger Observatory

The Lateral Trigger Probability function for the Ultra-High Energy Cosmic Ray showers detected by the Pierre Auger Observatory

Determination of ππ scattering lengths from measurement of π+π− atom lifetime

Solar panels for auger southern observatory: “SPIDERSHADOWS”

Advanced functionality for radio analysis in the Offline software framework of the Pierre Auger Observatory

Search for first harmonic modulation in the right ascension distribution of cosmic rays detected at the Pierre Auger Observatory

The exposure of the hybrid detector of the Pierre Auger Observatory

Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter

The fluorescence detector of the Pierre Auger Observatory

Measurement of the energy spectrum of cosmic rays above 1018 eV using the Pierre Auger Observatory

A study of the effect of molecular and aerosol conditions in the atmosphere on air fluorescence measurements at the Pierre Auger Observatory

Erratum to “Atmospheric effects on extensive air showers observed with the surface detector of the Pierre Auger observatory” [Astroparticle Physics 32(2) (2009), 89–99]

Trigger and aperture of the surface detector array of the Pierre Auger Observatory

Opcje filtrowania

Data publikacji

Dostępność treści

Typ publikacji

Słowa kluczowe

Zbiór danych

Czasopismo

INFONA - portal komunikacji naukowej

Wyniki wyszukiwania dla: A. Lopez Agüera

Dodaj adresata

Anulowanie wysłania wiadomości

Czy na pewno chcesz anulować wysłanie wiadomości?

Wyślij wiadomość

Opcje filtrowania

Data publikacji

Ustawianie zakresu dat

Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.

Dostępność treści

Typ publikacji

Słowa kluczowe

Zbiór danych

Czasopismo

Zgłaszanie błędu / nadużycia

Nieudane wysłanie zgłoszenia

Ułatwienia dostępu