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HESS - Abteilung Hofmann
Abstract:
Multi-wavelength observations of the centre of our Galaxy have revealed
a number of energetic processes that are related to the central
supermassive black hole. Gamma-ray astronomy contributes to these
observations with measurements from satellite and ground based instruments
such as Fermi-LAT and HESS. These measurements can
make important contributions towards answering some of the key
open questions. An analysis of the source HESS J1745-290, potentially
linked to acceleration of cosmic rays to PeV-energies, is presented in
this thesis. The analysis is performed using the HESS II array, which
includes the largest existing Cherenkov telescope, in order to measure
photon energies below 100GeV. Furthermore, the Galactic centre is
a promising target for indirect dark matter searches. Such a search is
performed in this thesis based on HESS and Fermi-LAT data . Due to
the limited angular resolution of current instruments in gamma-ray
astronomy, spectral analysis is often the only tool for the investigation
of gamma-ray sources. Therefore this thesis includes studies to
test which spectral analysis methods can lead to biased parameter
estimators.
