Search results for "pierre"
showing 10 items of 231 documents
Antennas for the detection of radio emission pulses from cosmic-ray induced air showers at the Pierre Auger Observatory.
2012
The Pierre Auger Observatory is exploring the potential of the radio detection technique to study extensive air showers induced by ultra-high energy cosmic rays. The Auger Engineering Radio Array (AERA) addresses both technological and scientific aspects of the radio technique. A first phase of AERA has been operating since September 2010 with detector stations observing radio signals at frequencies between 30 and 80 MHz. In this paper we present comparative studies to identify and optimize the antenna design for the final configuration of AERA consisting of 160 individual radio detector stations. The transient nature of the air shower signal requires a detailed description of the antenna s…
Measurement of the radiation energy in the radio signal of extensive air showers as a universal estimator of cosmic-ray energy
2016
We measure the energy emitted by extensive air showers in the form of radio emission in the frequency range from 30 to 80 MHz. Exploiting the accurate energy scale of the Pierre Auger Observatory, we obtain a radiation energy of 15.8±0.7(stat)±6.7(syst) MeV for cosmic rays with an energy of 1 EeV arriving perpendicularly to a geomagnetic field of 0.24 G, scaling quadratically with the cosmic-ray energy. A comparison with predictions from state-of-the-art first-principles calculations shows agreement with our measurement. The radiation energy provides direct access to the calorimetric energy in the electromagnetic cascade of extensive air showers. Comparison with our result thus allows the d…
Searches for Large-Scale Anisotropy in the Arrival Directions of Cosmic Rays Detected above Energy of $10^{19}$ eV at the Pierre Auger Observatory an…
2014
Spherical harmonic moments are well-suited for capturing anisotropy at any scale in the flux of cosmic rays. An unambiguous measurement of the full set of spherical harmonic coefficients requires full-sky coverage. This can be achieved by combining data from observatories located in both the northern and southern hemispheres. To this end, a joint analysis using data recorded at the Telescope Array and the Pierre Auger Observatory above 1019 eV is presented in this work. The resulting multipolar expansion of the flux of cosmic rays allows us to perform a series of anisotropy searches, and in particular to report on the angular power spectrum of cosmic rays above 1019 eV. No significant devia…
Les tropes dans deux spectacles du Théatre du Soleil : analyse rhétorique de L'Indiade ou l'Inde de leurs reves d'Hélène Cixous et d'Et soudain, …
1999
Les manuscrits de l’époque romane dans les listes de livres des établissements bénédictins bourguignons (XIe-XIVe siècle)
2017
International audience
Les pavements
1998
Un chargement de pierres de Saint-Leu pour le chantier de la cathédrale de Sens à la fin du Moyen Âge
1997
International audience
Martin Chambiges, ma\ⁱtre-bâtisseur des cathédrales de Sens et de Troyes
2000
A case of femoral-facial syndrome in a patient with autism spectrum disorders.
2011
The Femoral hypoplasia - unusual facies syndrome (FHUF) or Femoral - facial syndrome (FFS) was at first described in 1975. Up to now about 60 cases have been reported. According to our knowledge only 4 cases have had congenital central nervous system's malformations, furthermore the main stages of psychomotor development are almost always reported as normal or slightly altered in early childhood. We describe the first case of autism spectrum disorders (ASD) in a patient with FFS, emphasizing that this rare association could be one of many unrecognized underlying features.
Le site du monastère Saint-Pierre d'Ilovik (îlot Saint-Pierre, Croatie) : première étude archéologique du bâti
2011
Ce monastère, très mal connu, est situé dans une petite crique de l’îlot Saint-Pierre faisant face à l’île d’Ilovik, immédiatement au sud de Lošinj. L’îlot Saint-Pierre était occupé durant l’Antiquité par une grande villa, dont des vestiges (murs et sols) sont encore visibles sur la grève de la façade occidentale (fig. 1). Fig. 1 – Saint-Pierre d’Ilovik, sondages dans les enduits du mur sud : découvertes des baies (cl. S. Bully). Les photographies aériennes révèlent également plusieurs orga...