Hess J1731-347

38th COSPAR Scientific Assembly 2010 Research in Astrophysics from Space (E) New Insights into the Physics of Supernova Remnants and Pulsar Wind Nebulae (E19) HESS J1731-347 : A NEW TEV SHELL-TYPE SNR ? Fabio Acero, fabio.acero@lpta.in2p3.fr Laboratoire de Physique Théorique et d’Astroparticules/CNRS/Univeristé Montpellier II, Montpellier Cedex 5, France Komin Nukri, komin@lapp.in2p3.fr LAPP, Université de Savoie, CNRS/IN2P3, Annecy-le-Vieux, France Gerd Puehlhofer, gerd.puehlhofer@astro.uni-tuebingen.de IAAT, Universität Tübingen, Germany H.E.S.S. Collaboration A. Abramowski, F. Acero, F. Aharonian, A.G. Akhperjanian, G. Anton, U. Barres de Almeida, A.R. Bazer-Bachi, Y. Becherini, B. Behera, K. Bernlöhr, A. Bochow, C. Boisson, J. Bolmont, V. Borrel, J. Brucker, F. Brun, P. Brun, R. Bühler, T. Bulik, I. Büsching, T. Boutelier, P.M. Chadwick, A. Charbonnier, R.C.G. Chaves, A. Cheesebrough, J. Conrad, L.-M. Chounet, A.C. Clapson, G. Coignet, M. Dalton, M.K. Daniel, I.D. Davids, B. Degrange, C. Deil, H.J. Dickinson, A. Djannati-Ataı̈, W. Domainko, L.O’C. Drury, F. Dubois, G. Dubus, J. Dyks, M. Dyrda, K. Egberts, P. Eger, P. Espigat, L. Fallon, C. Farnier, S. Fegan, F. Feinstein, M.V. Fernandes, A. Fiasson, A. Förster, G. Fontaine, M. Füssling, S. Gabici, Y.A. Gallant, L. Gérard, D. Gerbig, B. Giebels, J.F. Glicenstein, B. Glück, P. Goret, D. Göring, D. Hampf, M. Hauser, S. Heinz, G. Heinzelmann, G. Henri, G. Hermann, J.A. Hinton, A. Hoffmann, W. Hofmann, P. Hofverberg, M. Holleran, S. Hoppe, D. Horns, A. Jacholkowska, O.C. de Jager, C. Jahn, I. Jung, K. Katarzynski, U. Katz, S. Kaufmann, M. Kerschhaggl, D. Khangulyan, B. Khélifi, D. Keogh, D. Klochkov, W. Kluzniak, T. Kneiske, Nu. Komin, K. Kosack, R. Kossakowski, G. Lamanna, J.-P. Lenain, T. Lohse, C.-C. Lu, V. Marandon, A. Marcowith, J. Masbou, D. Maurin, T.J.L. McComb, M.C. Medina, J. Méhault, R. Moderski, E. Moulin, M. Naumann-Godo, M. de Naurois, D. Nedbal, D. Nekrassov, N. Nguyen, B. Nicholas, J. Niemiec, S.J. Nolan, S. Ohm, J-F. Olive, E. de Ona Wilhelmi, B. Opitz, K.J. Orford, M. Ostrowski, M. Panter, M. Paz Arribas, G. Pedaletti, G. Pelletier, P.-O. Petrucci, S. Pita, G. Pühlhofer, M. Punch, A. Quirrenbach, B.C. Raubenheimer, M. Raue, S.M. Rayner, O. Reimer, M. Renaud, R. de los Reyes, F. Rieger, J. Ripken, L. Rob, S. Rosier-Lees, G. Rowell, B. Rudak, C.B. Rulten, J. Ruppel, F. Ryde, V. Sahakian, A. Santangelo, R. Schlickeiser, F.M. Schöck, A. Schönwald, U. Schwanke, S. Schwarzburg, S. Schwemmer, A. Shalchi, I. Sushch, M. Sikora, J.L. Skilton, H. Sol, L. Stawarz, R. Steenkamp, C. Stegmann, F. Stinzing, A. Szostek, P.H. Tam, J.-P. Tavernet, R. Terrier, O. Tibolla, M. Tluczykont, K. Valerius, C. van Eldik, G. Vasileiadis, C. Venter, L. Venter, J.P. Vialle, A. Viana, P. Vincent, M. Vivier, H.J. Völk, F. Volpe, S. Vorobiov, S.J. Wagner, M. Ward, A.A. Zdziarski, A. Zech, H.-S. Zechlin In the survey of the Galactic plane conducted with H.E.S.S., many TeV gamma-ray sources were discovered for which no clear counterpart at other wavelengths could be identified. HESS J1731-347 initially belonged to this source class. Recently however, the new shell-type supernova remnant (SNR) G353.6-0.7 was discovered in radio data, positionally coinciding with the TeV source. X-ray observations covering a fraction of the TeV source revealed a shell structure emitting non-thermal X-rays. Observations with the H.E.S.S. experiment have recently suggested a shell morphology in gamma-rays although not statistically significant. A larger H.E.S.S. data set, which comprises four times the observation time used in the discovery paper, allows us to investigate with greater statistics the gamma-ray morphology of the source and to test further the association of the TeV source with the new SNR. If true, this would make HESS J1731-347 a new object in the small but growing class of X-ray non-thermal shell-type supernova remnants with TeV emission.