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

Humboldt-Universität zu Berlin | Mathematisch-Naturwissen­schaft­liche Fakultät | Institut für Physik | Experimentelle Elementarteilchenphysik | H.E.S.S. | Talks & Papers | Detection of very high energy radiation from HESS J1908+063 confirms the Milagro unidentified source MGRO J1908+06

The H Collaboration (2009)

Detection of very high energy radiation from HESS J1908+063 confirms the Milagro unidentified source MGRO J1908+06

aap, 499:723-728.

Aims: Detection of a gamma-ray source above 300 GeV is reported, confirming the unidentified source MGRO J1908+06, discovered by the Milagro collaboration at a median energy of 20 TeV. Methods: The source was observed during 27 h as part of the extension of the HESS Galactic plane survey to longitudes >30°. Results: HESS J1908+063 is detected at a significance level of 10.9sigma with an integral flux above 1 TeV of (3.76 ± 0.29^ stat± 0.75_sys)×10^-12 ph cm^-2 s^-1, and a spectral photon index Gamma = 2.10±0.07^ stat± 0.2sys. The positions and fluxes of HESS J1908+063 and MGRO J1908+06 are in good agreement. Possible counterparts at other wavelengths and the origin of the gamma-ray emission are discussed. The nearby unidentified GeV source, GRO J1908+0556 (GeV) which also remains unidentified and the new Fermi pulsar 0FGL J1907.5+0617, may be connected to the TeV source.

Provided by the SAO/NASA Astrophysics Data System