HESS J1640-465 - an exceptionally luminous TeV gamma-ray supernova remnant

H.E.S.S. collaboration , A. Abramowski , F. Aharonian , F. Ait Benkhali , A.G. Akhperjanian , E. Ang\"uner , G. Anton , S. Balenderan

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A. Balzer A. Barnacka Y. Becherini J. Becker Tjus K. Bernl\"ohr E. Birsin E. Bissaldi J. Biteau M. B\"ottcher C. Boisson J. Bolmont P. Bordas J. Brucker F. Brun P. Brun T. Bulik S. Carrigan S. Casanova M. Cerruti P.M. Chadwick R. Chalme-Calvet R.C.G. Chaves A. Cheesebrough M. Chr\'etien S. Colafrancesco G. Cologna J. Conrad C. Couturier Y. Cui M. Dalton M.K. Daniel I.D. Davids B. Degrange C. Deil P. deWilt H.J. Dickinson A. Djannati-Ata\"i W. Domainko L.O'C. Drury G. Dubus K. Dutson J. Dyks M. Dyrda T. Edwards K. Egberts P. Eger P. Espigat C. Farnier S. Fegan F. Feinstein M.V. Fernandes D. Fernandez A. Fiasson G. Fontaine A. F\"orster M. F\"u{\ss}ling M. Gajdus Y.A. Gallant T. Garrigoux G. Giavitto B. Giebels J.F. Glicenstein M.-H. Grondin M. Grudzi\'nska S. H\"affner J. Hahn J. Harris G. Heinzelmann G. Henri G. Hermann O. Hervet A. Hillert J.A. Hinton W. Hofmann P. Hofverberg M. Holler D. Horns A. Jacholkowska C. Jahn M. Jamrozy M. Janiak F. Jankowsky I. Jung M.A. Kastendieck K. Katarzy\'nski U. Katz S. Kaufmann B. Kh\'elifi M. Kieffer S. Klepser D. Klochkov W. Klu\'zniak T. Kneiske D. Kolitzus Nu. Komin K. Kosack S. Krakau F. Krayzel P.P. Kr\"uger H. Laffon G. Lamanna J. Lefaucheur A. Lemi\`ere M. Lemoine-Goumard J.-P. Lenain D. Lennarz T. Lohse A. Lopatin C.-C. Lu V. Marandon A. Marcowith R. Marx G. Maurin N. Maxted M. Mayer T.J.L. McComb J. M\'ehault P.J. Meintjes U. Menzler M. Meyer R. Moderski M. Mohamed E. Moulin T. Murach C.L. Naumann M. de Naurois J. Niemiec S.J. Nolan L. Oakes S. Ohm E. de O\~na Wilhelmi B. Opitz M. Ostrowski I. Oya M. Panter R.D. Parsons M. Paz Arribas N.W. Pekeur G. Pelletier J. Perez P.-O. Petrucci B. Peyaud S. Pita H. Poon G. P\"uhlhofer M. Punch A. Quirrenbach S. Raab M. Raue A. Reimer O. Reimer M. Renaud R. de los Reyes F. Rieger L. Rob C. Romoli S. Rosier-Lees G. Rowell B. Rudak C.B. Rulten V. Sahakian D.A. Sanchez A. Santangelo R. Schlickeiser F. Sch\"ussler A. Schulz U. Schwanke S. Schwarzburg S. Schwemmer H. Sol G. Spengler F. Spies {\L}. Stawarz R. Steenkamp C. Stegmann F. Stinzing K. Stycz I. Sushch A. Szostek J.-P. Tavernet T. Tavernier A.M. Taylor R. Terrier M. Tluczykont C. Trichard K. Valerius C. van Eldik B. van Soelen G. Vasileiadis C. Venter A. Viana P. Vincent J. Vink H.J. V\"olk F. Volpe M. Vorster T. Vuillaume S.J. Wagner P. Wagner M. Ward M. Weidinger Q. Weitzel R. White A. Wierzcholska P. Willmann A. W\"ornlein D. Wouters V. Zabalza M. Zacharias A. Zajczyk A.A. Zdziarski A. Zech H.-S. Zechlin

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keywords energygamma-raycut-offemissionhesshighj1640-465observations

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The results of follow-up observations of the TeV gamma-ray source HESSJ 1640-465 from 2004 to 2011 with the High Energy Stereoscopic System (H.E.S.S.) are reported in this work. The spectrum is well described by an exponential cut-off power law with photon index Gamma=2.11 +/- 0.09_stat +/- 0.10_sys, and a cut-off energy of E_c = (6.0 +2.0 -1.2) TeV. The TeV emission is significantly extended and overlaps with the north-western part of the shell of the SNR G338.3-0.0. The new H.E.S.S. results, a re-analysis of archival XMM-Newton data, and multi-wavelength observations suggest that a significant part of the gamma-ray emission from HESS J1640-465 originates in the SNR shell. In a hadronic scenario, as suggested by the smooth connection of the GeV and TeV spectra, the product of total proton energy and mean target density could be as high as W_p n_H ~ 4 x 10^52 (d/10kpc)^2 erg cm^-3.

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HESS J1640-465 - an exceptionally luminous TeV gamma-ray supernova remnant

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