Ricap09 Roma International Conference on Astroparticle Physics

Session

g-rays

May 15, 2009, 2:30 PM

Roma

230. VHE pulsed gamma-ray emission from the Crab Pulsar by MAGIC

Ms Roberta Zanin (IFAE)

5/15/09, 2:30 PM

The last six years have witnessed major revisions of our knowledge about the Crab Pulsar, the central engine of the remnant of the supernova explosion that occurred in 1054 AD. The consensus scenario for the origin of the high-energy pulsed emission has been challenged with the discovery of a very-high-energy power law tail extending up to ~400 GeV, above the expected spectral cut off at a few...

233. Very-high-energy steady spectrum of Crab nebula

Dr Federico Fraschetti (University of Arizona)

5/15/09, 2:55 PM

The very-high-energy steady emission (beyond 50 GeV) of the Crab nebula is believed to originate from Inverse Compton scattering of low energy photons off energetic electrons. However, the mechanism accelerating the electrons to TeV energies and the resulting particle distribution are still a topic of debate. Benefitting from a wealth of data collected with ground-based gamma-ray observatories...

253. Supernova Remnants with Fermi Large Area Telescope

Micaela Caragiulo (BA)

5/15/09, 3:15 PM

The Large Area Telescope (LAT), onboard the Fermi satellite, proved to be, after more than 7 years of data taking, an excellent instrument to detect and observe Supernova Remnants (SNRs) in a range of energies running from few hundred MeV up to few hundred GeV. It provides essential information on physical processes that occur at the source, involving both accelerated leptons and hadrons, in...

254. The First Fermi-LAT SNR Catalog SNR and Cosmic Ray Implications

Francesco De Palma (BA)

5/15/09, 3:35 PM

While supernova remnants (SNRs) are widely thought to be powerful cosmic-ray accelerators, indirect evidence comes from a small number of well-studied cases. Here we systematically determine the gamma-ray emission detected by the Fermi Large Area Telescope (LAT) from all known Galactic SNRs, disentangling them from the sea of cosmic-ray generated photons in the Galactic plane. Using LAT data...

203. Detection of VHE gamma-rays from AGN's with redshift close to z=1

Andrew Taylor

5/15/09, 3:55 PM