La relève

La relève des expériences contemporaines d’imagerie atmosphérique TcherenkovH.E.S.S.,MAGIC

et VERITAS sera assurée par l’observatoire CTA [Actis et al., 2011] prévu pour être totalement

opérationnel à l’horizon 2020. Deux réseaux hybrides, l’un au nord et l’autre au sud, constitués de différents types de télescopes, permettront d’une part d’observer des évènements de très basse énergie (∼10 GeV) à l’aide de grands télescopes munis de réflecteurs de 24 m de diamètre, mais aussi d’avoir accès aux rayons γ très énergétiques en couvrant une large surface de petits et de moyens télescopes (respectivement 6 m et 12 m de diamètre), tous dotés d’un champ de vue important (≥6°). Ces caractéristiques vont permettre à l’observatoireCTAd’atteindre un gain en sensibilité d’un facteur

5 à 10 à toutes les énergies par rapport aux expériences qui sont aujourd’hui en fonctionnement. Les premières données techniques devraient être disponibles en 2017.

3_{http://tevcat.uchicago.edu}

1.5. Les expériences d’astronomie γ de très haute énergie 15

16 Bibliographie

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Chapitre 2

Noyaux actifs de galaxies

Sommaire

2.1 Introduction . . . 19