The rapid atmospheric monitoring system of the Pierre Auger Observatory
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
05/11/2013
05/11/2013
2012
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Resumo |
The Pierre Auger Observatory is a facility built to detect air showers produced by cosmic rays above 10(17) eV. During clear nights with a low illuminated moon fraction, the UV fluorescence light produced by air showers is recorded by optical telescopes at the Observatory. To correct the observations for variations in atmospheric conditions, atmospheric monitoring is performed at regular intervals ranging from several minutes (for cloud identification) to several hours (for aerosol conditions) to several days (for vertical profiles of temperature, pressure, and humidity). In 2009, the monitoring program was upgraded to allow for additional targeted measurements of atmospheric conditions shortly after the detection of air showers of special interest, e. g., showers produced by very high-energy cosmic rays or showers with atypical longitudinal profiles. The former events are of particular importance for the determination of the energy scale of the Observatory, and the latter are characteristic of unusual air shower physics or exotic primary particle types. The purpose of targeted (or "rapid") monitoring is to improve the resolution of the atmospheric measurements for such events. In this paper, we report on the implementation of the rapid monitoring program and its current status. The rapid monitoring data have been analyzed and applied to the reconstruction of air showers of high interest, and indicate that the air fluorescence measurements affected by clouds and aerosols are effectively corrected using measurements from the regular atmospheric monitoring program. We find that the rapid monitoring program has potential for supporting dedicated physics analyses beyond the standard event reconstruction. Comision Nacional de Energia Atomica, Argentina Fundacion Antorchas Gobierno De La Provincia de Mendoza, Municipalidad de Malargue, Argentina NDM Holdings Valle Las Lenas, Argentina Australian Research Council Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) Financiadora de Estudos e Projetos (FINEP) Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPERJ) Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Ministerio de Ciencia e Tecnologia (MCT), Brazil Academy of Sciences of the Czech Republic [AVCR [AV0Z10100502, AV0Z10100522, GAAV KJB100100904, MSMT-CR LA08016, LG11044, MEB111003, MSM0021620859, LA08015, TACR TA01010517] Centre de Calcul IN2P3/CNRS, Centre National de la Recherche Scientifique (CNRS) Conseil Regional Ile-de-France, Departement Physique Nucleaire et Corpusculaire (PNCIN2P3/CNRS) Departement Sciences de l'Univers (SDU-INSU/CNRS), France Bundesministerium fur Bildung und Forschung (BMBF) Deutsche Forschungsgemeinschaft (DFG) Finanzministerium Baden-Wurttemberg Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF) Ministerium fur Wissenschaft und Forschung, Nordrhein-Westfalen Ministerium fur Wissenschaft, Forschung und Kunst, Baden-Wurttemberg, Germany Istituto Nazionale di Fisica Nucleare (INFN) Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR), Italy Consejo Nacional de Ciencia y Tecnologia (CONACYT), Mexico Ministerie van Onderwijs, Cultuur en Wetenschap, Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) Stichting voor Fundamenteel Onderzoek der Materie (FOM), Netherlands Ministry of Science and Higher Education, Poland [N N202 200239, N N202 207238] Portuguese national funds FEDER funds within COMPETE - Programa Operacional Factores de Competitividade through Fundacao para a Ciencia e a Tecnologia, Portugal Ministry of Education, Science, Culture and Sport, Slovenian Research Agency, Slovenia Comunidad de Madrid, Consejeria de Educacion de la Comunidad de Castilla La Mancha FEDER funds Ministerio de Ciencia e Innovacion and Consolider-Ingenio (CPAN) Xunta de Galicia, Spain Science and Technology Facilities Council, United Kingdom Department of Energy [DE-AC02-07CH11359, DE-FR02-04ER41300] National Science Foundation [0450696] Grainger Foundation USA NAFOSTED, Vietnam Marie Curie IRSES/EPLANET European Particle Physics Latin American Network European Union [PIRSES-2009-GA-246806, MEIF-CT-2005-025057, PIEF-GA-2008-220240] UNESCO |
Identificador |
JOURNAL OF INSTRUMENTATION, BRISTOL, v. 7, p. 599-621, SEP, 2012 1748-0221 http://www.producao.usp.br/handle/BDPI/40913 10.1088/1748-0221/7/09/P09001 |
Idioma(s) |
eng |
Publicador |
IOP PUBLISHING LTD BRISTOL |
Relação |
JOURNAL OF INSTRUMENTATION |
Direitos |
restrictedAccess Copyright IOP PUBLISHING LTD |
Palavras-Chave | #LARGE DETECTOR SYSTEMS FOR PARTICLE AND ASTROPARTICLE PHYSICS #REAL-TIME MONITORING #CONTROL AND MONITOR SYSTEMS ONLINE #ENERGY-SPECTRUM #FLUORESCENCE #DETECTOR #SHOWERS #INSTRUMENTS & INSTRUMENTATION |
Tipo |
article original article publishedVersion |