HESS J0632+057 : A new gamma-ray binary?
- Hinton, J. A.
- Skilton, J. L.
- Funk, S.
- Brucker, J.
- Aharonian, F. A.
- Dubus, G.
- Fiasson, Armand
- Gallant, Yves
- Hofmann, W.
- Marcowith, Alexandre
- Reimer, O.
DOIAbstract
International audienceThe High Energy Stereoscopic System (HESS) survey of the Galactic plane hasestablished the existence of a substantial number (~40) of Galactic TeVgamma-ray sources, a large fraction of which remain unidentified. HESSJ0632+057 is one of a small fraction of these objects which is point-like innature(<2' rms), and is one of only two point-like sources that remainunidentified. Follow-up observations of this object with XMM-Newton haverevealed an X-ray source coincident with the TeV source and with the massivestar MWC 148, of the spectral type B0pe. This source exhibits a hard spectrum,consistent with an absorbed power law with Gamma = 1.26 +/- 0.04, and showssignificant variability on hour timescales. We discuss this spati...
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