Bonn 2010 – scientific programme

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T: Fachverband Teilchenphysik

T 93: Gammaastronomie II

T 93.7: Talk

Tuesday, March 16, 2010, 18:20–18:35, HG XVII

HESS J1356−645, a new γ-ray pulsar wind nebula? — •Manuel Paz Arribas — Humboldt University, Berlin, Germany — DESY, Zeuthen, Germany

HESS J1356−645 was recently discovered by the H.E.S.S. Cherenkov telescope system as a new γ-ray source above 100 GeV very close to the location of the young and energetic pulsar PSR J1357−6429. This source has been investigated based on observations of 10 hours livetime and preliminary results show a clear signal with a significance at the 8.5 σ level. The spectral analysis reveals a quite hard spectrum well described by a power law with a 2.2 photon index and an integrated flux between 1 and 10 TeV of about 11% of the Crab Nebula flux in the same energy band. The analysis of x-ray data and preliminary results of the γ-ray data give indications for a pulsar wind nebula scenario as a possible explanation for the γ-ray emission.