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X- and gamma-ray studies of HESS J1731-347 coincident with a newly discovered SNR
Fabio Acero1, G. Pühlhofer, D. Klochkov, Nu. Komin2, Yves Gallant1, D. Horns, A. Santangelo
H. E. S. S. Collaboration Collaboration(s)
(03/07/2009)

In the survey of the Galactic plane conducted with H.E.S.S., many VHEgamma-ray sources were discovered for which no clear counterpart at otherwavelengths could be identified. HESS J1731-347 initially belonged to thissource class. Recently however, the new shell-type supernova remnant (SNR)G353.6-0.7 was discovered in radio data, positionally coinciding with the VHEsource. We will present new X-ray observations that cover a fraction of the VHEsource, revealing nonthermal emission that most likely can be interpreted assynchrotron emission from high-energy electrons. This, along with a largerH.E.S.S. data set which comprises more than twice the observation time used inthe discovery paper, allows us to test whether the VHE source may indeed beattributed to shell-type emission from that new SNR. If true, this would makeHESS J1731-347 a new object in the small but growing class of non-thermalshell-type supernova remnants with VHE emission.
1 :  LPTA - Laboratoire de Physique Théorique et Astroparticules
2 :  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
Planète et Univers/Astrophysique/Phénomènes cosmiques de haute energie

Physique/Astrophysique/Phénomènes cosmiques de haute energie

Planète et Univers/Astrophysique/Astrophysique galactique

Physique/Astrophysique/Astrophysique galactique
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/0907.0642