Presentations

Presentations: 45 mn

J. Carr, CPPM

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M. Boer, CESR

Cosmic Gamma-Ray bursts are now commonly observed at all wavelengths. These sources are of cosmological origin, though their progenitor, and the emission processes leading to the burst and afterglow are still lacking a firm explanation. However, it is now clear that the processes leading to the burst and its afterglow involves the acceleration of a plasma to ultra-relativistic speeds. GRBs have been proposed as possible sites for the production of high energy neutrinos, as well as several types of particles. We will present the present understanding and open questions about GRBs, and the current and future efforts which may lead to a better knowledge of these elusive sources.

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GRB Afterglows

A. De Rujula, CERN

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The Multiwavelength Universe

P. Von Ballmoos, CESR

From radiofrequencies to high energy gamma-rays, we presently dispose of more than forty maps of the entire sky - no other scientific objective has been studied over such a broad spectral range. A multiwavelength panorama of the Universe is presented, and the interest of comprehending the "big picture" is demonstrated by an example in high energy astrophysics.

Microquasars

F. Mirabel, CEA/DAPNIA/Service d'Astrophysique

Microquasars are stellar-mass black holes in our own Galaxy that mimic, on a smaller scale, many of the phenomena seen in quasars. Their discovery has open the way for a new understanding of the connection between accretion of matter onto black holes and the origin of relativistic jets. I will concentrate on the impact this new field of research has for high energy Physics and Astrophysics, the open questions, and future perspectives.

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Integral

P. Von Ballmoos, CESR

The next major step in exploring the high-energy Universe is the ESA's INTEGRAL mission. In october 2002, INTEGRAL is to be launched into a High Eccentric Orbit. Its two main instruments, SPI and IBIS, cover complementary aspects to obtain the broadest possible astrophysical information : the spectrometer SPI offers good narrow line sensitivity and provides an extended source imaging capability. The imager IBIS will provide the complement of fine imaging; it also has useful sensitivity to broad lines and continuum emission. The INTEGRAL payload will be completed by two monitor instruments covering the main instrument FOVs and providing concurrent monitoring of gamma-ray targets in the X-ray (2-100 keV) and optical domains

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Neutrino Emission from SNRs and Pulsars

J.A. de Freitas Pacheco, Observatoire de la Côte d'Azur

Aspects of the different evolutionary phases of SNRs will be reviewed, as well as those concerning particle acceleration by the shock wave. Expected neutrino fluxes from pions produced in the shock will be discussed. Finally, some considerations about the neutrino emission from pulsars will be presented.

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SuperKamiokande

J. Sulak, Boston University

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Neutrino Measurement with MACRO: neutrino oscillation, dark matter and astronomy studies

T. Montaruli, Università di Bari and INFN

The MACRO detector was located under the Gran Sasso mountain and has produced results on neutrino oscillations, dark matter indirect searches and neutrino astrophysics. More than 1300 upward-going neutrino induced muons have been selected with the ToF technique using about 600 tons of liquid scintillator and streamer tubes for high precision tracking. MACRO definitely prefers the nu_mu - nu_tau oscillation hypothesis with maximum mixing and squared mass difference of about 2.5 * 10^-3 eV² against no oscillations and nu_mu - nu_sterile oscillations. No neutrino of astrophysical origin or induced by WIMPs in the core of the Sun or of the Earth has been detected between measured atmospheric neutrinos. These negative results produce interesting upper bounds.

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Amanda

W. Rhode, University of Wuppertal

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Status of ANTARES: and Undersea Neutrino Telescope

P. Coyle, CPPM

ANTARES is an 0.1 km² underwater neutrino telescope, currently under construction in the Mediterranean sea. The current status, future plans and physics prospects of this experiment are described.

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The Baikal Neutrino Project: Status Report

Zh.-A.Dzhilkibaev, Institute for Nuclear Research

The Baikal Neutrino Telescope is deployed in Lake Baikal, Siberia, 3.6 km from shore at a depth of 1.1 km. NT-200, the medium-term goal of the collaboration, was put into operation at April 6th, 1998. We review the present status of the Baikal Neutrino Project and present results of a search for upward going atmospheric neutrinos, WIMPs and magnetic monopoles obtained with the detector NT-200. Also the results of a search for very high energy neutrinos are presented. An upper limit on the electron neutrino diffuse flux of E²*F(E)<(1.3-1.9)*10^-6 cm^-2*s^-1*sr^-1*GeV within a neutrino energy range 10⁴-10⁷ GeV is obtained, assuming an E^-2 behaviour of the neutrino spectrum and flavor ratio n_e:n_m = 2.

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NEMO Project Status Report

G. Riccobene, Laboratori Nazionali del Sud

In the talk the NEMO (NEutrino Mediterranean Observatory) collaboration will be presented. We will give report the status of the art of the studies on underwater networks of electro optical cables, connectors, mechanical layout and data transmission, conducted together with leading companies in the field of submarine operations. We also present two years of measurement conducted in the region of Capo Passero, an optimal site for the deployment of a km³ detector at 3300 m depth, near the Sicilian Coasts. In addition we will show the Test Site constructed by NEMO, 28 km offshore the town of Catania.

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Auger: a New Window into Ultra High Energy Cosmic Rays

A. Letessier-Selvon, LPNHE

After a brief introduction of the main research topics and questions open by the existence of Ultra High Energy Cosmic Rays, this lecture will introduce the Auger Experiment. The design and physics objective will be depicted and the status of the undergoing construction will be given. Special emphasis will be given on the detection of UHE gamma and neutrinos. Some of the first events seen with our enginering detector will also be shown.

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EUSO: a Space Observatory for Extreme High Energy Cosmic Rays and Neutrinos

S. Bottai, University of Florence and INFN

The solution of open problems which arise from the present detection of Extreme High Energy Cosmic Rays (EHECR) demands the use of Cosmic Ray detectors with effective areas of the order of 10⁴ km². The Extreme Universe Space Observatory (EUSO) is designed for such purpose. Once EUSO will be accomodated on the International Space Station (ISS) it will detect the fluorescence light produced in the atmosphere by the Extensive Air Showers (EAS) induced by the interaction of EHECR. Looking down the atmosphere from 380 km with a Field of View of 60 degree EUSO will be able to monitor 1.5.10⁵ km² of Earth surface with a duty cycle close to 10 % and an energy threshold around E=3.10¹⁹ eV . The EUSO Space Observatory, observing an atmospheric mass of 1.5.10¹⁸g, will offer also a unique opportunity to check for the existence of cosmic EHE neutrinos with energy close to 10²⁰ eV. In this presentation will be reviewed the EUSO project, its main goals and its present status. The attention will be focused mainly on the possibility to detect Neutrinos. The results of simulations of neutrino induced showers in the atmosphere and simulations of the detector response will be presented. The possibility to detect upgoing tau-neutrinos will be also discussed.