Geneva University
École de physique - Département de physique nucléaire et corpusculaire
24, quai Ernest-Ansermet
1211 GENÈVE 4
Tél: (022) 379 62 73 - Fax: (022) 379 69 92
Wednesday 13 May 2009
PARTICLE PHYSICS SEMINAR
at 17:00 – Stückelberg Auditorium
Observing the extreme universe with the Fermi Gamma-ray Space Telescope
Prof. Olaf Reimer / Stanford University
The Fermi Gamma-ray Space Telescope (FGST, formerly GLAST) is an international observatory-type satellite mission with a physics program spanning from gamma-ray astronomy to particle astrophysics and cosmology. FGST was launched on June 11, 2008 and is successfully conducting science observations of the high-energy gamma-ray sky since August 2008. A varienty of discoveries has been made already, including monitoring rapid blazar variability, the existence of GeV gamma-ray bursts, and numerous new gamma-ray sources of different types, including those belonging to previously unknown gamma-ray source classes like msPSRs, globular cluster and non-blazar-type AGN. Fermi-LAT, the observatory’s main instrument, also performed an accurate measurement of the diffuse gamma-radiation which clarifies the controversially discussed "GeV excess" reported by EGRET almost 10 years ago, detected of gamma-radiation from molecular clouds, proved that radio-quiet PSR constitute a substantial fraction among Galactic gamma-ray sources, and measured the cosmic GeV to TeV electron spectrum with high precision. An overview of the observatory status and already accomplished scientific results will be presented."
Information :
http://dpnc.unige.ch/seminaire/annonce.html
Organizer : J.-S. Graulich
Lundi 18 mai 2009
COLLOQUE
à 17:00 – Auditoire Stückelberg
Calibration astronomique des échelles de temps géologiques
Professeur J. Laskar / Directeur de Recherche CNRS à l’Observatoire de Paris
More information in French part of the Bulletin
Organiser: Prof. Markus Büttiker