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July 29, 2015 to August 6, 2015
World Forum
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Sgr A* Observations with H.E.S.S. II

Aug 4, 2015, 3:30 PM
15m
Amazon (World Forum)

Amazon

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution GA-EX Parallel GA16 H.E.S.S.

Speaker

Dr Robert Parsons (Max Planck Institute for Nuclear Physics)

Description

The Galactic Centre has been studied with the H.E.S.S. array for over 10 years, revealing a bright, complex gamma-ray morphology above 100 GeV. Besides a strong point-like very-high-energy gamma-ray source coincident with the supermassive black hole Sgr A*, previous analyses also revealed a diffuse ridge of gamma-ray emission, indicative of a powerful cosmic-ray accelerator in this region. The addition of a fifth telescope with 600 m$^2$ mirror area to the centre of the H.E.S.S. array has significantly increased the energy range accessible, allowing observations to take place below 100 GeV. This wider energy range allows an important overlap in observations with satellite instruments such as the Fermi-LAT gamma-ray telescope. We will present the results of new H.E.S.S observations of the Galactic Centre region and show a detailed analysis of the central source, including comparisons to results at other wavelengths.
Collaboration H.E.S.S.
Registration number following "ICRC2015-I/" 559

Primary author

Dr Robert Parsons (Max Planck Institute for Nuclear Physics)

Co-authors

Aion Viana (M) Cyril Trichard (LAPP) Emmanuel Moulin (CEA) Helen Poon (urn:Facebook) Mr Johannes King (Max Planck Institute for Nuclear Physics) Mr Johannes Veh (University of Erlangen) Karl Kosack (CEA Saclay) Markus Holler (LLR - Ecole Polytechnique) Mathieu de Naurois (CNRS) Raphaël Chalmé-Calvet (LPNHE) Valentin lefranc (CEA)

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