3-11 July 2007
Merida, Mexico
Mexico/General timezone
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HE 1.3.A

Place

Location: Merida, Mexico
Room: Yucatan II+III+IV (Fiesta Americana)
Date: from 4 Jul 12:45 to 7 Jul 09:10

Timetable | Contribution List

Displaying 12 contributions out of 12
Type: Oral Session: HE 1.3.A
Track: HE.1.3.A
We present updated results for anisotropy searches in the direction of the Galactic centre at energies in the EeV range. We use data from the Pierre Auger Southern Observatory up to March, 2007. Present analyses are therefore based on a substantially larger data set than our previous published results. The larger statistics from the surface array allow for more precise measurements as a ... More
Presented by Edivaldo SANTOS on 4/7/2007 at 17:45
Type: Oral Session: HE 1.3.A
Track: HE.1.3.A
The characteristics relating to lateral and longitudinal development of EAS in the energy region of 10**15 - 10**19 eV have been analyzed in the framework of the QGSJET model and of mass composition of primary cosmic rays. It is found that at E0 >= 5x10**15 eV the mean mass composition of primary cosmic rays begins to vary as indicated by a rise of <ln(A)> with increasing energy. The maximum ... More
Presented by Dr. Stanislav KNURENKO on 6/7/2007 at 16:10
Type: Oral Session: HE 1.3.A
Track: HE.1.3.A
Extensive air showers are associated with transient radio emission, which could provide a new mode of detection of UHECR with an important target volume and a high duty cycle. The Codalema experiment has been set up and is running in the Radio Observatory in Nançay, France, to investigate this possibility. The apparatus is composed of an antenna array overlapped by a ground particle array. A ... More
Presented by Dr. Didier LEBRUN on 7/7/2007 at 13:42
Type: Oral Session: HE 1.3.A
Track: HE.1.3.A
For the conditions of KASCADE-Grande the lateral particle density at about 500 m distance from the shower core S(500) has been shown by detailed simulation studies to be an approximate energy estimator, being nearly independent of the mass of the primary particle. This report presents some features of the S(500) observable of EAS registered with the KASCADE-Grande array installed at Forschungs ... More
Presented by Dr. Iliana BRANCUS on 6/7/2007 at 18:18
Type: Oral Session: HE 1.3.A
Track: HE.1.4.A
The EAS induced by ultra high energy cosmic rays excite the atmosphere which emits fluorescence light. Images of showers in this light can be registered from large distances,as narrow tracks, the intensity at a given level being proportional to the shower energy deposited there. However, there is also Cherenkov light accompanying the shower which, when scattered sideways, adds to the fluoresc ... More
Presented by Prof. Maria GILLER on 6/7/2007 at 16:22
Type: Oral Session: HE 1.3.A
Track: HE.1.3.A
Traditionally, longitudinal shower profiles are reconstructed in fluorescence light experiments by treating the Cherenkov light contribution as background. In this talk we will argue that, due to the universality of the energy spectra of electrons and positrons, both fluorescence and Cherenkov light can be used simultaneously as signal to infer the longitudinal shower development. We pres ... More
Presented by Dr. Michael UNGER on 7/7/2007 at 13:54
Type: Oral Session: HE 1.3.A
Track: HE.1.3.A
Inclined showers (i.e. showers with zenith angle above 40 degrees) are registered by the KASCADE-Grande experiment, which is designed to address fundamental questions about the origin, composition and acceleration mechanisms of primary cosmic rays between $10^{14}$ and $10^{18}$ eV. Despite the aggravate reconstruction due to the thin scintillation detectors used in KASCADE-G ... More
Presented by Dr. Juan Carlos ARTEAGA-VELAZQUEZ on 6/7/2007 at 17:42
Type: Oral Session: HE 1.3.A
Track: HE.1.3.A
We use more than two years of data from the Pierre Auger Observatory to search for anisotropies on large scales in different energy windows above 1 EeV. We account for various systematics in the acceptance, in particular due to weather variations. We present the results of analyses and consistency checks looking for patterns such as right ascension modulations.
Presented by Dr. Eric ARMENGAUD on 4/7/2007 at 17:55
Type: Oral Session: HE 1.3.A
Track: HE.1.3.A
KASCADE-Grande is an extensive air shower experiment co-located to the original KASCADE site at Forschungszentrum Karlsruhe, Germany. Main parts of the experiment are the Grande array consisting of 37x10 sqm scintillation detectors spread over an area of 700x700 sqm, the original KASCADE array with 252 stations covering 200x200 sqm with unshielded and shielded detectors, and additional muon tr ... More
Presented by Dr. Andreas HAUNGS on 6/7/2007 at 18:06
Type: Oral Session: HE 1.3.A
Track: HE.1.3.A
The Grande array as main part of the KASCADE-Grande experiment consists of 37x10 sqm scintillation detectors spread over an area of 700x700 sqm. Grande enables triggers and reconstruction of primary cosmic rays in the energy range of ~30 PeV to 1 EeV. This contribution discusses the reconstruction of the shower size spectrum, i.e. the total number of charged particles. The KASCADE-Grande set- ... More
Presented by Dr. Federico DI PIERRO on 6/7/2007 at 17:30
Type: Oral Session: HE 1.3.A
Track: HE.1.3.A
KASCADE-Grande is a multi detector setup for the investigation of extensive air showers in the primary energy range of the knee including energies around the so-called second knee. With the data of the 700 x 700 sqm large Grande array shower core position, shower direction, and the total number of electrons are reconstructed for events with primary energy above 50 PeV. Among others, the Grand ... More
Presented by Dr. Vitor DE SOUZA on 6/7/2007 at 17:54
Type: Oral Session: HE 1.3.A
Track: HE.1.3.A
The principle of the CODALEMA experiment is based on an original approach for the detection of radio transients associated with extensive air showers induced by ultra high energy cosmic rays. Since September 2006, CODALEMA is under operation with a new setup (technically described in another contribution to this conference) at the Nancay Radio Observatory in France. It uses 16 broadband dipole ... More
Presented by Dr. Olivier RAVEL on 7/7/2007 at 13:30
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