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Giebels, B. Gl\\\"uck, B. Kh\\'elifi1, B. Nicholas, B. Opitz, B. Peyaud, B. Rudak, C. Boisson, C.B. Rulten, C.-C. Lu, C. Couturier, C. Deil, C. Farnier, C. Jahn, C.L. Naumann, C. Stegmann, C. van Eldik, C. Venter, D.A. Sanchez, D. Fernandez, D. G\\\"oring, D. Hampf, D. Horns, D. Klochkov, D. Lennarz, D. Nedbal, E. Birsin, E. de O\\~na Wilhelmi, E. Moulin, F. Acero, F. Aharonian, F. Brun, F. Feinstein, F. Krayzel, F. Rieger, F. Sheidaei, F. Stinzing, F. Volpe, G. Anton, G. Cologna, G. Dubus, G. Fontaine, G. Heinzelmann, G. Henri, G. Hermann, G. Lamanna, G. Maurin, G. Pelletier, G. P\\\"uhlhofer, G. Rowell, G. Spengler, G. Vasileiadis, HESS Collaboration: A. Abramowski, H. Gast, H.J. Dickinson, H.J. V\\\"olk, H. Laffon, H. Sol, H.-S. Zechlin, I.D. Davids, I. Jung, I. Oya, I. Sushch, J.A. Hinton, J. Becker, J. Biteau, J. Bolmont, J. Brucker, J. Conrad, J.D. Hague, J. Dyks, J.F. Glicenstein, J. Hahn, J. Harris, J.L. Skilton, J. Masbou, J. M\\'ehault, J. Niemiec, J. Perez, J.-P. Lenain, J.-P. Tavernet, J. Ripken, K. Bernl\\\"ohr, K. Dutson, K. Egberts, K. Katarzy\\'nski, K. Kosack, K. Stycz, K. Valerius, L. Fallon, L. G\\'erard, L.O'C. Drury, L. Rob, {\\L}. Stawarz, M.A. Kastendieck, M. Cerruti, M.C. Medina, M. Dalton, M. de Naurois, M. Dyrda, M. F\\\"u{\\ss}ling, M. Gajdus, M. Hauser, M.-H. Grondin, M. Holler, M. Jamrozy, M.K. Daniel, M. Mayer, M. Mohamed, M. Naumann-Godo, M. Ostrowski, M. Panter, M. Paz Arribas, M. Punch, M. Raue, M. Renaud, M. Tluczykont, M.V. Fernandes, M. Vorster, M.Ward, M. Zacharias, N. Maxted, N. Nguyen, Nu. Komin, N.W. Pekeur, O.C. de Jager, O. Reimer, P. Bordas, P. Brun, P. Eger, P. Espigat, P. Hofverberg, P.M. Chadwick, P.-O. Petrucci, P. Vincent, R.C.G. Chaves, R. de los Reyes, R. Kossakowski, R. Moderski, R. Schlickeiser, R. Steenkamp, R. Terrier, R.White, S. Balenderan, S. Carrigan, S. Casanova, S. Fegan, S. H\\\"affner, S. Heinz, S.J. Nolan, S.J.Wagner, S. Kaufmann, S. Ohm, S. Pita, S. Rosier-Lees, S. Schwarzburg, S. Schwemmer, S. Vorobiov, T. Bulik, T. Garrigoux, T.J.L. McComb, T. Kneiske, T. Lohse, U. Katz, U. Menzler, U. Schwanke, V. Marandon, V. Sahakian, W. Domainko, W. Hofmann, W. Klu\\'zniak, Y.A. Gallant, Y. Becherini","submitted_at":"2012-08-08T10:26:40Z","abstract_excerpt":"We present the significant detection of the first extragalactic pulsar wind nebula (PWN) detected in gamma rays, N157B, located in the large Magellanic Cloud (LMC). Pulsars with high spin-down luminosity are found to power energised nebulae that emit gamma rays up to energies of several tens of TeV. N157B is associated with PSRJ0537-6910, which is the pulsar with the highest known spin-down luminosity. The High Energy Stereoscopic System telescope array observed this nebula on a yearly basis from 2004 to 2009 with a dead-time corrected exposure of 46 h. 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Zdziarski, A. Balzer, A. Barnacka, A. Bochow, A. Charbonnier, A. Cheesebrough, A. Djannati-Ata\\\"i, A. Fiasson, A. F\\\"orster, A.G. Akhperjanian, A. Hillert, A. Jacholkowska, A. Lopatin, A. Marcowith, A. Quirrenbach, A. Reimer, A. Santangelo, A. Schulz, A. Szostek, A. Viana, A. Wierzcholska, A. Zajczyk, A. Zech, B. Degrange, B. Giebels, B. Gl\\\"uck, B. Kh\\'elifi1, B. Nicholas, B. Opitz, B. Peyaud, B. Rudak, C. Boisson, C.B. Rulten, C.-C. Lu, C. Couturier, C. Deil, C. Farnier, C. Jahn, C.L. Naumann, C. Stegmann, C. van Eldik, C. Venter, D.A. Sanchez, D. Fernandez, D. G\\\"oring, D. Hampf, D. Horns, D. Klochkov, D. Lennarz, D. Nedbal, E. Birsin, E. de O\\~na Wilhelmi, E. Moulin, F. Acero, F. Aharonian, F. Brun, F. Feinstein, F. Krayzel, F. Rieger, F. Sheidaei, F. Stinzing, F. Volpe, G. Anton, G. Cologna, G. Dubus, G. Fontaine, G. Heinzelmann, G. Henri, G. Hermann, G. Lamanna, G. Maurin, G. Pelletier, G. P\\\"uhlhofer, G. Rowell, G. Spengler, G. Vasileiadis, HESS Collaboration: A. 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Chadwick, P.-O. Petrucci, P. Vincent, R.C.G. Chaves, R. de los Reyes, R. Kossakowski, R. Moderski, R. Schlickeiser, R. Steenkamp, R. Terrier, R.White, S. Balenderan, S. Carrigan, S. Casanova, S. Fegan, S. H\\\"affner, S. Heinz, S.J. Nolan, S.J.Wagner, S. Kaufmann, S. Ohm, S. Pita, S. Rosier-Lees, S. Schwarzburg, S. Schwemmer, S. Vorobiov, T. Bulik, T. Garrigoux, T.J.L. McComb, T. Kneiske, T. Lohse, U. Katz, U. Menzler, U. Schwanke, V. Marandon, V. Sahakian, W. Domainko, W. Hofmann, W. Klu\\'zniak, Y.A. Gallant, Y. Becherini","submitted_at":"2012-08-08T10:26:40Z","abstract_excerpt":"We present the significant detection of the first extragalactic pulsar wind nebula (PWN) detected in gamma rays, N157B, located in the large Magellanic Cloud (LMC). Pulsars with high spin-down luminosity are found to power energised nebulae that emit gamma rays up to energies of several tens of TeV. N157B is associated with PSRJ0537-6910, which is the pulsar with the highest known spin-down luminosity. 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