HAL : hal-00430140, version 1

arXiv : 0907.0642

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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)

Domaine

:

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

hal-00430140, version 1

http://hal.archives-ouvertes.fr/hal-00430140

oai:hal.archives-ouvertes.fr:hal-00430140

Contributeur : Logiciel Aigle <>

Déposé pour le compte de : Fabio ACERO <>

Soumis le : Jeudi 5 Novembre 2009, 17:51:00

Dernière modification le : Jeudi 5 Novembre 2009, 18:44:40