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Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Experimentelle Elementarteilchenphysik

The H Collaboration (2005)

Very high energy gamma rays from the composite SNR G 0.9+0.1

aap, 432:L25-L29.

Very high energy (>100 GeV) gamma-ray emission has been detected for the first time from the composite supernova remnant G 0.9+0.1 using the HESS instrument. The source is detected with a significance of ≈13sigma, and a photon flux above 200 GeV of (5.7±0.7^stat±1.2^sys)×10^-12 cm^-2 s^-1, making it one of the weakest sources ever detected at TeV energies. The photon spectrum is compatible with a power law (dN/dE ∝ E^-Gamma) with photon index Gamma = 2.40±0.11^stat±0.20^sys. The gamma-ray emission appears to originate in the plerionic core of the remnant, rather than the shell, and can be plausibly explained as inverse Compton scattering of relativistic electrons.

Provided by the SAO/NASA Astrophysics Data System