218 articles – 618 references  [version française]
 HAL: in2p3-00023550, version 1
 arXiv: astro-ph/0501155
 Results from observations of AGNs with the H.E.S.S. telescope system and Future plansPunch M.Dans Exploring the Cosmic Frontier Astrophysical Instruments for the 21st Century - Exploring the Cosmic Frontier Astrophysical Instruments for the 21st Century, Berlin : Allemagne (2004) - http://hal.in2p3.fr/in2p3-00023550
 Physics/Astrophysics/Cosmology and Extra-Galactic Astrophysics Sciences of the Universe/Astrophysics/Cosmology and Extra-Galactic Astrophysics Sciences of the Universe/Astrophysics
Results from observations of AGNs with the H.E.S.S. telescope system and Future plans
M. Punch1, 2
 1: APC - UMR 7164 - AstroParticule et Cosmologie http://www.apc.univ-paris7.fr/ CNRS : UMR7164 – IN2P3 – Observatoire de Paris – Université Paris VII - Paris Diderot – CEA : DSM/IRFU APC - UMR 7164, Université Paris Diderot, 10 rue Alice Domon et Léonie Duquet, case postale 7020, F-75205 Paris Cedex 13 France 2: PCC - Physique Corpusculaire et Cosmologie - Collège de France CNRS : UMR7553 – IN2P3 – Université Paris VII - Paris Diderot 11, place Marcelin Berthelot - 75231 Paris Cedex 05 France
APC - AHE
The H.E.S.S. (High Energy Stereoscopic System) phase I is comprised of four Imaging Atmospheric Cherenkov telescopes, for observation of galactic and cosmic sources of very high energy gamma rays. Its installation in the Khomas highlands, Namibia has been completed in December, 2003. The first of these telescopes was installed in June 2003, and data-taking has proceeded since that time. The HESS telescope system provides a significant improvement in sensitivity and a threshold for detection below that of previous Imaging Atmospheric Cherenkov Telescopes. The characteristics for the phase-I will be presented, together with plans for phase-II of the experiment, comprised of a large telescope in the centre of the current phase-I providing a lowered threshold and increased sensitivity. We can observe AGNs up to redshift 0.5 with HESS and 2-3 with HESS Phase-2, which provides a unique capability for study of spectral and temporal characteristics on timescales of several hours or even less than 1 h (depending on the strength of flares). We will present the first results from a number of southern AGN observed during the installation of the phase-I, in particular concerning the detection and spectral properties of the AGN PKS2155$-$305.
HESS

Conference proceedings
2007
2004-05
Exploring the Cosmic Frontier Astrophysical Instruments for the 21st Century
international
A.P. Lobanov, J.A. Zensus, C. Cesarsky, Ph. Diamond
175-178
Springer
ESO Astrophysics Symposia

Exploring the Cosmic Frontier Astrophysical Instruments for the 21st Century
Berlin
Germany
2004-05-18
2004-05-21

APC-PCC 04 69
Springer-Verlag series "ESO Astrophysics Symposia"
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 in2p3-00023550, version 1 http://hal.in2p3.fr/in2p3-00023550 oai:hal.in2p3.fr:in2p3-00023550 From: Simone Lantz <> Submitted on: Monday, 10 January 2005 12:10:32 Updated on: Tuesday, 7 August 2012 12:28:06