The Monoceros very-high-energy gamma-ray source

A. Fiasson (1) , J. A. Hinton , Y. Gallant (1) , A. Marcowith (1) , O. Reimer , G. Rowell

1 LPTA - Laboratoire de Physique Théorique et Astroparticules

The H.E.S.S. telescope array has observed the complex Monoceros Loop SNR/Rosette Nebula region which contains unidentified high energy EGRET sources and potential very-high-energy (VHE) gamma-ray source. We announce the discovery of a new point-like VHE gamma-ray sources, HESS J0632+057. It is located close to the rim of the Monoceros SNR and has no clear counterpart at other wavelengths. Data from the NANTEN telescope have been used to investigate hadronic interactions with nearby molecular clouds. We found no evidence for a clear association. The VHE gamma-ray emission is possibly associated with the lower energy gamma-ray source 3EG J0634+0521, a weak X-ray source 1RXS J063258.3+054857 and the Be-star MWC 148.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Astrophysique [astro-ph]

A. Fiasson, J. A. Hinton, Y. Gallant, A. Marcowith, O. Reimer, et al.. The Monoceros very-high-energy gamma-ray source. 30th International Cosmic Ray Conference - ICRC'07, Jul 2007, Merida, Mexico. ⟨in2p3-00186521⟩