SciNeGHE 2012

Session

The gamma-ray sky

04

20 Jun 2012, 14:30

Lecce

26. VHE emission from extragalactic sources: open issues from MWL observations

Antonio Stamerra (SI)

20/06/2012, 14:30

The Cherenkov telescopes observations together with with Fermi/LAT survey and multi-wavelength (MWL) simultaneous coverage are posing new challenges to the description of extreme sources, such as blazars, flat spectrum radio quasars (FSRQs), and radiogalaxies. We will review some of these new results threatening the conventional emission models. Among them: the difficulties of the usual...

6. Observations of Pulsar Wind Nebulae in Gamma-rays from GeV to TeV energies

Dr Marie-Hélène Grondin (Max-Planck Institut für Kernphysik (MPIK) Heidelberg, Germany)

20/06/2012, 15:05

Since 2003, the continuous observations of the Galactic Plane by Atmospheric Cherenkov Telescopes, especially by H.E.S.S., have yielded the detection of more than 60 Galactic sources. Among them, Pulsar Wind Nebulae (PWNe) are the dominant class with more than 15 sources firmly identified. In the GeV energy range, observations have been made possible through the launch of the Fermi-Large...

10. Study of the Galactic Gamma-ray Sources with VERITAS

Dr Gareth Hughes (DESY Zeuthen)

20/06/2012, 15:30

We report on recent galactic results and discoveries made by the VERITAS collaboration. The Very Energetic Radiation Imaging Telescope Array System (VERITAS) is a ground-based gamma-ray observatory, located in southern Arizona, sensitive to energies from 100GeV up to 30TeV. VERITAS has been fully operational since 2007 and its current sensitivity enables the detection of a 1% Crab Nebula flux...

3. Overview of the Galactic results obtained by MAGIC

Dr Roberta Zanin (Universitat de Barcelona)

20/06/2012, 15:55

MAGIC is a system of two atmospheric Cherenkov telescopes which explores the very-high-energy sky, from some tens of GeV up to tens of TeV. Located in the Canary island of La Palma, MAGIC has the lowest energy threshold among the instruments of its kind, well suited to study the still poorly explored energy band below 100 GeV. Although the space-borne gamma-ray telescope Fermi/LAT is sensitive...

0. Gamma-ray emission from Crab pulsar and the nebula: paradigm shifts?

Maxim Lyutikov Lyutikov (Purdue University/Arcetri Observatory)

20/06/2012, 16:20

The detection of Crab pulsar by VERITAS collaboration as well as Agile and Fermi results on gamma-ray pulsars imply the dominance of the Inverse Compton scattering over the curvature radiation and signify an important shifts in our understanding of pulsar high energy emission. Recent observations of flares in the Crab nebula call into question the prevalent model of particle acceleration...