BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Ultra high energy cosmic rays observed by the CODALEMA radio detec tion experiment DTSTART;VALUE=DATE-TIME:20070707T133000Z DTEND;VALUE=DATE-TIME:20070707T134200Z DTSTAMP;VALUE=DATE-TIME:20260417T053523Z UID:indico-contribution-56-1-460@cern.ch DESCRIPTION:Speakers: Dr. RAVEL\, Olivier (Laboratoire SUBATECH\, Universi té de Nantes)\nThe principle of the CODALEMA experiment is based on an or iginal approach for the\ndetection of radio transients associated with ext ensive air showers induced by ultra\nhigh energy cosmic rays. Since Septem ber 2006\, CODALEMA is under operation with a new\nsetup (technically desc ribed in another contribution to this conference) at the\nNancay Radio Obs ervatory in France. It uses 16 broadband dipole antennas associated\nwith 13 particle detectors generating the trigger and allowing the primary cosm ic ray\nenergy estimation. We will present the evidences for the radio det ection of cosmic\nray above 10^17 eV\, based on an event by event analysis showing time and arrival\ndirection coincidences between the two detector s arrays. The characteristics of the\nshowers detected\, like the core pos ition and the lateral electric field dependence\,\nwill be shown. Finally\ , correlation between the cosmic ray energy determined by the\nparticle de tectors and the electric field amplitude measured by the dipoles will be\n discussed.\n\nhttps://indico.nucleares.unam.mx/event/4/session/56/contribu tion/460 LOCATION:Merida\, Mexico Kabah (Holiday Inn) URL:https://indico.nucleares.unam.mx/event/4/session/56/contribution/460 END:VEVENT BEGIN:VEVENT SUMMARY:Codalema: A cosmic ray radio detection array DTSTART;VALUE=DATE-TIME:20070707T134200Z DTEND;VALUE=DATE-TIME:20070707T135400Z DTSTAMP;VALUE=DATE-TIME:20260417T053523Z UID:indico-contribution-56-1-161@cern.ch DESCRIPTION:Speakers: Dr. LEBRUN\, Didier (LPSC-Grenoble)\nExtensive air s howers are associated with transient radio emission\, which could\nprovide a new mode of detection of UHECR with an important target volume and a hi gh\nduty cycle. The Codalema experiment has been set up and is running in the Radio\nObservatory in Nançay\, France\, to investigate this possibili ty.\nThe apparatus is composed of an antenna array overlapped by a ground particle array.\nA set of 16 wide band active dipoles are aligned on two 6 00 meter long baselines in\nthe North-South and East-West directions. This radio array is triggered by a ground\ndetector of 240 meters square conta ining 13 plastic scintillator stations. The\nantennas and scintillators ar e wired to a central data acquisition system where all\nthe signals are pr ocessed. Radio signals are recorded in a large 1-200 MHz bandwidth\,\nwhil e favorable signal to background ratio is looked for in a narrower band a round\n50 MHz. In this band\, the natural sky background on site – almos t free from\nanthropogenic radio frequency interferences – allows a sens ivity to showers with\nenergy around 10^17 eV. In this paper we shall pres ent the set-up\, simulation\,\ncalibration\, sensitivity and performance o f both arrays\, and some illustrative\ncoincidence events will be discuss ed.\n\nhttps://indico.nucleares.unam.mx/event/4/session/56/contribution/16 1 LOCATION:Merida\, Mexico Kabah (Holiday Inn) URL:https://indico.nucleares.unam.mx/event/4/session/56/contribution/161 END:VEVENT BEGIN:VEVENT SUMMARY:Longitudinal Shower Profile Reconstruction from Fluorescence and C herenkov light DTSTART;VALUE=DATE-TIME:20070707T135400Z DTEND;VALUE=DATE-TIME:20070707T140600Z DTSTAMP;VALUE=DATE-TIME:20260417T053523Z UID:indico-contribution-56-1-972@cern.ch DESCRIPTION:Speakers: Dr. UNGER\, Michael (Forschungszentrum Karlsruhe)\nT raditionally\, longitudinal shower profiles are reconstructed in\nfluoresc ence light experiments by treating the Cherenkov light\ncontribution as ba ckground. In this talk we will argue that\, due to\nthe universality of t he energy spectra of electrons and positrons\, both\nfluorescence and Cher enkov light can be used simultaneously as signal\nto infer the longitudina l shower development. \nWe present a new profile reconstruction method th at is based on the analytic\nleast-square solution for the estimation of t he shower profile from the observed\nlight signal and discuss the inter- a nd extrapolation of the profile\nwith a Gaisser-Hillas function.\n\nhttps: //indico.nucleares.unam.mx/event/4/session/56/contribution/972 LOCATION:Merida\, Mexico Kabah (Holiday Inn) URL:https://indico.nucleares.unam.mx/event/4/session/56/contribution/972 END:VEVENT BEGIN:VEVENT SUMMARY:AVERAGE MASS COMPOSITION OF PRIMARY COSMIC RAYS IN THE SUPERHIGH E NERGY REGION BY THE YAKUTSK COMPLEX EAS ARRAY DATA DTSTART;VALUE=DATE-TIME:20070706T161000Z DTEND;VALUE=DATE-TIME:20070706T162200Z DTSTAMP;VALUE=DATE-TIME:20260417T053523Z UID:indico-contribution-56-0-2@cern.ch DESCRIPTION:Speakers: Dr. KNURENKO\, Stanislav (Yu. G. Shafer Institute of Cosmophysical Research and Aeronomy)\nThe characteristics relating to la teral and longitudinal development of EAS in the\nenergy region of 10**15 - 10**19 eV have been analyzed in the framework of the QGSJET\nmodel and o f mass composition of primary cosmic rays. It is found that at E0 >=\n5x1 0**15 eV the mean mass composition of primary cosmic rays begins to vary a s\nindicated by a rise of with increasing energy. The maximum value of is\nobserved at E0 ~(5 - 50) x10**16 eV. It is confirmed by data of many c ompact EAS\narrays and does not contradict to an anomal diffusion model of cosmic ray propagation\nin our galaxy (Lagutin et al.\, 2001). In the sup erhigh energy region (>= 10**18 eV)\nthe value begins to decrease\, i.e. the mass composition becomes lighter and\nconsists from proton and nuclei of He and C. It does not contradict to our earlier\nestimations for the ma ss composition and points to a growing role of the metagalactic\ncomponent of cosmic rays in the superhigh energy region (Berezinsky et al.\, 2004). \n\nhttps://indico.nucleares.unam.mx/event/4/session/56/contribution/2 LOCATION:Merida\, Mexico Yucatan II+III+IV (Fiesta Americana) URL:https://indico.nucleares.unam.mx/event/4/session/56/contribution/2 END:VEVENT BEGIN:VEVENT SUMMARY:Influence of the scattered Cherenkov light on the width of shower images as measured in the EAS fluorescence experiments DTSTART;VALUE=DATE-TIME:20070706T162200Z DTEND;VALUE=DATE-TIME:20070706T163400Z DTSTAMP;VALUE=DATE-TIME:20260417T053523Z UID:indico-contribution-56-0-651@cern.ch DESCRIPTION:Speakers: Prof. GILLER\, Maria (University of Lodz)\nThe EAS i nduced by ultra high energy cosmic rays excite the atmosphere which emits \nfluorescence light. Images of showers in this light can be registered fr om large\ndistances\,as narrow tracks\, the intensity at a given level bei ng proportional to the\nshower energy deposited there. However\, there is also Cherenkov light accompanying\nthe shower which\, when scattered sidew ays\, adds to the fluorescence light.\nWe show that the width of the showe r image is determined not only by the lateral\nspread of the shower electr ons\, but by the lateral distribution of the Cherenkov\nlight\, scattered to the observer. We analyse how this effect scales with the shower\nparame ters and those of its development in the atmosphere. \nIn particular\, the importance of this effect grows with the distance (in meters) of\nthe ob served shower level to the shower maximum.\n\nhttps://indico.nucleares.un am.mx/event/4/session/56/contribution/651 LOCATION:Merida\, Mexico Yucatan II+III+IV (Fiesta Americana) URL:https://indico.nucleares.unam.mx/event/4/session/56/contribution/651 END:VEVENT BEGIN:VEVENT SUMMARY:A search for possible anisotropies of cosmic rays with 0.1 < E < 1 0 EeV in the region of the Galactic Centre. DTSTART;VALUE=DATE-TIME:20070704T174500Z DTEND;VALUE=DATE-TIME:20070704T175500Z DTSTAMP;VALUE=DATE-TIME:20260417T053523Z UID:indico-contribution-56-3-73@cern.ch DESCRIPTION:Speakers: SANTOS\, Edivaldo (CBPF\, Rio de Janeiro)\nWe presen t updated results for anisotropy searches in the direction of the \nGalact ic centre at energies in the EeV range. We use data from the Pierre \nAuge r Southern Observatory up to March\, 2007. Present analyses are therefore \nbased on a substantially larger data set than our previous published res ults. \nThe larger statistics from the surface array allow for more precis e measurements \nas a function of energy while the fluorescence detector d ata allow for the \nextension of our searches to energies below 1 EeV. In this paper\, we test several\nscenarios for predicted sources of cosmic ra ys arriving from the Galactic center \nwith energies between 0.1 and 10 Ee V.\n\nhttps://indico.nucleares.unam.mx/event/4/session/56/contribution/73 LOCATION:Merida\, Mexico Yucatan II+III+IV (Fiesta Americana) URL:https://indico.nucleares.unam.mx/event/4/session/56/contribution/73 END:VEVENT BEGIN:VEVENT SUMMARY:Search for large scale anisotropies at energies above 1 EeV with t he Auger Observatory. DTSTART;VALUE=DATE-TIME:20070704T175500Z DTEND;VALUE=DATE-TIME:20070704T180500Z DTSTAMP;VALUE=DATE-TIME:20260417T053523Z UID:indico-contribution-56-3-76@cern.ch DESCRIPTION:Speakers: Dr. ARMENGAUD\, Eric (Univerisity Paris VII)\nWe use more than two years of data from the Pierre Auger \nObservatory to search for anisotropies on large scales in \ndifferent energy windows above 1 Ee V. We account for various \nsystematics in the acceptance\, in particular due to weather \nvariations. We present the results of analyses and consi stency \nchecks looking for patterns such as right ascension modulations.\ n\nhttps://indico.nucleares.unam.mx/event/4/session/56/contribution/76 LOCATION:Merida\, Mexico Yucatan II+III+IV (Fiesta Americana) URL:https://indico.nucleares.unam.mx/event/4/session/56/contribution/76 END:VEVENT BEGIN:VEVENT SUMMARY:The shower size spectrum reconstructed with KASCADE-Grande DTSTART;VALUE=DATE-TIME:20070706T173000Z DTEND;VALUE=DATE-TIME:20070706T174200Z DTSTAMP;VALUE=DATE-TIME:20260417T053523Z UID:indico-contribution-56-2-324@cern.ch DESCRIPTION:Speakers: Dr. DI PIERRO\, Federico (University of Torino)\nThe Grande array as main part of the KASCADE-Grande experiment consists of 37 x10 sqm\nscintillation detectors spread over an area of 700x700 sqm. Grand e enables triggers\nand reconstruction of primary cosmic rays in the energ y range of ~30 PeV to 1 EeV. \nThis contribution discusses the reconstruct ion of the shower size spectrum\, i.e. the\ntotal number of charged partic les. The KASCADE-Grande set-up allows\, for a subsample\nof the registered showers\, detailed comparisons of the data with measurements of the\norig inal KASCADE array (252 detectors\, 490 sqm sensitive area spread over 200 x200\nsqm) on an event-by-event basis. The obtained reconstruction accurac y of N_charged\nwill be presented as well as the lateral charged particle distributions and the\nabsorption length of the charged particle component . In the overlapping size region\nthe resulting shower size spectra for di fferent zenith angular ranges will be\ncompared with the KASCADE size spec tra.\n\nhttps://indico.nucleares.unam.mx/event/4/session/56/contribution/3 24 LOCATION:Merida\, Mexico Yucatan II+III+IV (Fiesta Americana) URL:https://indico.nucleares.unam.mx/event/4/session/56/contribution/324 END:VEVENT BEGIN:VEVENT SUMMARY:Muon spectra reconstructed from inclined air showers measured by K ASCADE-Grande DTSTART;VALUE=DATE-TIME:20070706T174200Z DTEND;VALUE=DATE-TIME:20070706T175400Z DTSTAMP;VALUE=DATE-TIME:20260417T053523Z UID:indico-contribution-56-2-491@cern.ch DESCRIPTION:Speakers: Dr. ARTEAGA-VELAZQUEZ\, Juan Carlos (Institut fuer K ernphysik\, Forschungszentrum Karlsruhe\, 76021\, Karlsruhe\, Germany)\nIn clined showers (i.e. showers with zenith angle above 40 degrees) \n are re gistered by the KASCADE-Grande experiment\, which is designed \n to addre ss fundamental questions about the origin\, composition and \n accelerati on mechanisms of primary cosmic rays between $10^{14}$ \n and $10^{18} $ eV. Despite the aggravate reconstruction due to the \n thin scintillati on detectors used in KASCADE-Grande these inclined \n events are valuable since they offer a good opportunity to both\, \n study the penetrating component of the air showers and cross-checks \n of hadronic interaction models. Working in this direction\, a first \n analysis of the KASCADE-Gr ande data from inclined events has been \n done. In particular\, the muo n spectra from these showers have been \n reconstructed for different zen ith angle intervals and the features \n of the resulting spectra\, studied and confronted with expectations \n from Monte Carlo simulations.\n\nhtt ps://indico.nucleares.unam.mx/event/4/session/56/contribution/491 LOCATION:Merida\, Mexico Yucatan II+III+IV (Fiesta Americana) URL:https://indico.nucleares.unam.mx/event/4/session/56/contribution/491 END:VEVENT BEGIN:VEVENT SUMMARY:Total Muon Number Reconstruction with KASCADE-Grande DTSTART;VALUE=DATE-TIME:20070706T175400Z DTEND;VALUE=DATE-TIME:20070706T180600Z DTSTAMP;VALUE=DATE-TIME:20260417T053523Z UID:indico-contribution-56-2-613@cern.ch DESCRIPTION:Speakers: Dr. DE SOUZA\, Vitor (University of Karlsruhe)\nKASC ADE-Grande is a multi detector setup for the investigation of extensive ai r\nshowers in the primary energy range of the knee including energies arou nd the\nso-called second knee. With the data of the 700 x 700 sqm large Gr ande array shower\ncore position\, shower direction\, and the total number of electrons are reconstructed\nfor events with primary energy above 50 P eV.\nAmong others\, the Grande array measures in coincidence with the orig inal KASCADE muon\narray consisting of 690 sqm shielded scintillators.The data of these detectors are\nused to reconstruct the total muon number ($E _{mu} > 230$ MeV) and the muon densities\nat different radial distances fo r individual showers\, as well as the mean muon\nlateral distributions at different zenith angular ranges. We report first results of\nthese muon me asurements at KASCADE-Grande.\n\nhttps://indico.nucleares.unam.mx/event/4/ session/56/contribution/613 LOCATION:Merida\, Mexico Yucatan II+III+IV (Fiesta Americana) URL:https://indico.nucleares.unam.mx/event/4/session/56/contribution/613 END:VEVENT BEGIN:VEVENT SUMMARY:The KASCADE-Grande Experiment DTSTART;VALUE=DATE-TIME:20070706T180600Z DTEND;VALUE=DATE-TIME:20070706T181800Z DTSTAMP;VALUE=DATE-TIME:20260417T053523Z UID:indico-contribution-56-2-828@cern.ch DESCRIPTION:Speakers: Dr. HAUNGS\, Andreas (Forschungszentrum Karlsruhe)\n KASCADE-Grande is an extensive air shower experiment co-located to the ori ginal\nKASCADE site at Forschungszentrum Karlsruhe\, Germany. Main parts o f the experiment\nare the Grande array consisting of 37x10 sqm scintillati on detectors spread over an\narea of 700x700 sqm\, the original KASCADE ar ray with 252 stations covering 200x200\nsqm with unshielded and shielded d etectors\, and additional muon tracking devices. \nThis multi-detector sys tem allows to investigate the energy spectrum\, composition\,\nand anisotr opies of cosmic rays in the energy range up to 1 EeV. The primary goals\nb esides investigating the origin of the knee at a few PeV\, are to verify t he\nexistence of the second knee at approximately 100 PeV and to measure t he composition\nin the expected transition region of galactic to extragala ctic cosmic rays. An\noverview on the performance of the apparatus\, showe r reconstruction methods\, and\nfirst results will be given on the basis o f three years of data taking with the\nGrande set-up.\n\nhttps://indico.nu cleares.unam.mx/event/4/session/56/contribution/828 LOCATION:Merida\, Mexico Yucatan II+III+IV (Fiesta Americana) URL:https://indico.nucleares.unam.mx/event/4/session/56/contribution/828 END:VEVENT BEGIN:VEVENT SUMMARY:Features of the S(500) distribution for Extended Air Showers Obser ved with the KASCADE-Grande array DTSTART;VALUE=DATE-TIME:20070706T181800Z DTEND;VALUE=DATE-TIME:20070706T183000Z DTSTAMP;VALUE=DATE-TIME:20260417T053523Z UID:indico-contribution-56-2-834@cern.ch DESCRIPTION:Speakers: Dr. BRANCUS\, Iliana (National Institute of Physics and Nuclear Engineering)\nFor the conditions of KASCADE-Grande the lateral particle density at about 500 m\ndistance from the shower core S(500) has been shown by detailed simulation studies to\nbe an approximate energy es timator\, being nearly independent of the mass of the\nprimary particle. T his report presents some features of the S(500) observable of EAS\nregiste red with the KASCADE-Grande array installed at Forschungszentrum Karlsruhe .\nThe measured energy deposits of particles in the scintillation detector s have been\nused to reconstruct the lateral charged particle distribution s described by an LDF\nfunction for which the Linsley LDF has been found a ppropriate. With adjusting the\ncharged particle density distribution and applying several cuts\, the S(500)\ndistribution of the data has been eval uated. Among other features\, the S(500)\ndependence from the EAS angle o f incidence and the power-law like shape of the\ndistributions has been st udied.\n\nhttps://indico.nucleares.unam.mx/event/4/session/56/contribution /834 LOCATION:Merida\, Mexico Yucatan II+III+IV (Fiesta Americana) URL:https://indico.nucleares.unam.mx/event/4/session/56/contribution/834 END:VEVENT END:VCALENDAR