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Monthly Notices of the Royal Astronomical Society 399, 1 (2009) 317 - 322
The radio counterpart of the likely TeV binary HESS J0632+057
J. L. Skilton, M. Pandey-Pommier, J. A. Hinton, C. C. Cheung, F. A. Aharonian, J. Brucker, G. Dubus1, Armand Fiasson2, 3, S. Funk, Yves Gallant2, Alexandre Marcowith2, O. Reimer

The few known gamma-ray binary systems are all associated with variable radioand X-ray emission. The TeV source HESS J0632+057, apparently associated withthe Be star MWC148, is plausibly a new member of this class. Following theidentification of a variable X-ray counterpart to the TeV source we conductedGMRT and VLA observations in June-September 2008 to search for the radiocounterpart of this object. A point-like radio source at the position of thestar is detected in both 1280 MHz GMRT and 5 GHz VLA observations, with anaverage spectral index, alpha, of ~0.6. In the VLA data there is significantflux variability on ~month timescales around the mean flux density of ~0.3 mJy.These radio properties (and the overall spectral energy distribution) areconsistent with an interpretation of HESS J0632+057 as a lower power analogueof the established gamma-ray binary systems.
1 :  LAOG - Laboratoire d'Astrophysique de Grenoble
2 :  LPTA - Laboratoire de Physique Théorique et Astroparticules
3 :  LAPP - Laboratoire d'Annecy le Vieux de Physique des Particules
Planète et Univers/Astrophysique/Phénomènes cosmiques de haute energie
radio-continuum:stars – X-rays:binaries
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