%0 Journal Article
%T Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N 157B with H.E.S.S.
%+ Laboratoire Univers et Particules de Montpellier (LUPM)
%+ Laboratoire Leprince-Ringuet (LLR)
%+ AstroParticule et Cosmologie (APC (UMR_7164))
%+ Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE)
%+ APC - Astrophysique des Hautes Energies (APC - AHE)
%+ Laboratoire d'Annecy de Physique des Particules (LAPP)
%A Abramowski, A.
%A Acero, Fabio
%A Aharonian, F.
%A Akhperjanian, A. G.
%A Anton, G.
%A Balenderan, S.
%A Balzer, A.
%A Barnacka, A.
%A Becherini, Y.
%A Becker, J.
%A Bernlöhr, K.
%A Birsin, E.
%A Biteau, J.
%A Bochow, A.
%A Boisson, C.
%A Bolmont, J.
%A Bordas, P.
%A Brucker, J.
%A Brun, F.
%A Brun, P.
%A Bulik, T.
%A Carrigan, S.
%A Casanova, S.
%A Cerruti, M.
%A Chadwick, P. M.
%A Charbonnier, A.
%A Chaves, R. C. G.
%A Cheesebrough, A.
%A Cologna, G.
%A Conrad, J.
%A Couturier, C.
%A Dalton, M.
%A Daniel, M. K.
%A Davids, I. D.
%A Degrange, B.
%A Deil, C.
%A Dickinson, H. J.
%A Djannati-Ataï, A.
%A Domainko, W.
%A Drury, L. O'C.
%A Dubus, G.
%A Dutson, K.
%A Dyks, J.
%A Dyrda, M.
%A Egberts, K.
%A Eger, P.
%A Espigat, P.
%A Fallon, L.
%A Farnier, C.
%A Fegan, S.
%A Feinstein, F.
%A Fernandes, M. V.
%A Fernandez, D.
%A Fiasson, A.
%A Fontaine, G.
%A Förster, A.
%A Füssling, M.
%A Gajdus, M.
%A Gallant, Y. A.
%A Garrigoux, T.
%A Gast, H.
%A Gérard, L.
%A Giebels, B.
%A Glicenstein, J. F.
%A Glück, B.
%A Göring, D.
%A Grondin, M. -H.
%A Häffner, S.
%A Hague, J. D.
%A Hahn, J.
%A Hampf, D.
%A Harris, J.
%A Hauser, M.
%A Heinz, S.
%A Heinzelmann, G.
%A Henri, G.
%A Hermann, G.
%A Hillert, A.
%A Hinton, J. A.
%A Hofmann, W.
%A Hofverberg, P.
%A Holler, M.
%A Horns, D.
%A Jacholkowska, A.
%A de Jager, O. C.
%A Jahn, C.
%A Jamrozy, M.
%A Jung, I.
%A Kastendieck, M. A.
%A Katarzyński, K.
%A Katz, U.
%A Kaufmann, S.
%A Khélifi, B.
%A Klochkov, D.
%A Kluźniak, W.
%A Kneiske, T.
%A Komin, Nu.
%A Kosack, K.
%A Kossakowski, R.
%A Krayzel, F.
%A Laffon, H.
%A Lamanna, G.
%A Lenain, J. -P.
%A Lennarz, D.
%A Lohse, T.
%A Lopatin, A.
%A Lu, C. -C.
%A Marandon, V.
%A Marcowith, Alexandre
%A Masbou, Julien
%A Maurin, G.
%A Maxted, N.
%A Mayer, M.
%A Mccomb, T. J. L.
%A Medina, M. C.
%A Méhault, J.
%A Menzler, U.
%A Moderski, R.
%A Mohamed, M.
%A Moulin, Emmanuel
%A Naumann, C. L.
%A Naumann-Godo, M.
%A de Naurois, M.
%A Nedbal, D.
%A Nguyen, N.
%A Nicholas, B.
%A Niemiec, J.
%A Nolan, S. J.
%A Ohm, S.
%A Wilhelmi, E. de Oña
%A Opitz, B.
%A Ostrowski, M.
%A Oya, I.
%A Panter, M.
%A Arribas, M. Paz
%A Pekeur, N. W.
%A Pelletier, G.
%A Perez, J.
%A Petrucci, P. -O.
%A Peyaud, B.
%A Pita, S.
%A Pühlhofer, G.
%A Punch, M.
%A Quirrenbach, A.
%A Raue, M.
%A Reimer, A.
%A Reimer, O.
%A Renaud, Matthieu
%A Reyes, R. de Los
%A Rieger, F.
%A Ripken, J.
%A Rob, L.
%A Rosier-Lees, S.
%A Rowell, G.
%A Rudak, B.
%A Rulten, C. B.
%A Sahakian, V.
%A Sanchez, D. A.
%A Santangelo, A.
%A Schlickeiser, R.
%A Schulz, A.
%A Schwanke, U.
%A Schwarzburg, S.
%A Schwemmer, S.
%A Sheidaei, F.
%A Skilton, J. L.
%A Sol, H.
%A Spengler, G.
%A Stawarz, Ł.
%A Steenkamp, R.
%A Stegmann, C.
%A Stinzing, F.
%A Stycz, K.
%A Sushch, I.
%A Szostek, A.
%A Tavernet, J. -P.
%A Terrier, R.
%A Tluczykont, M.
%A Valerius, K.
%A van Eldik, C.
%A Vasileiadis, George
%A Venter, C.
%A Viana, A.
%A Vincent, P.
%A Völk, H. J.
%A Volpe, F.
%A Vorobiov, S.
%A Vorster, M.
%A Wagner, S. J.
%A Ward, M.
%A White, R.
%A Wierzcholska, A.
%A Zacharias, M.
%A Zajczyk, A.
%A Zdziarski, A. A.
%A Zech, A.
%A Zechlin, H. -S.
%Z 5 pages, 2 figures, accepted for publication in A&A Letters
%< avec comité de lecture
%@ 0004-6361
%J Astronomy and Astrophysics - A&A
%I EDP Sciences
%V 545
%P L2
%8 2012-09
%D 2012
%Z 1208.1636
%Z 2012A&A...545L...2H
%R 10.1051/0004-6361/201219906
%Z Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Journal articles
%X 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. The gamma-ray spectrum between 600 GeV and 12 TeV is well-described by a pure power-law with a photon index of 2.8 \pm 0.2(stat) \pm 0.3(syst) and a normalisation at 1 TeV of (8.2 \pm 0.8(stat) \pm 2.5(syst)) \times 10^-13 cm^-2s^-1TeV^-1. A leptonic multi-wavelength model shows that an energy of about 4 \times 10^49erg is stored in electrons and positrons. The apparent efficiency, which is the ratio of the TeV gamma-ray luminosity to the pulsar's spindown luminosity, 0.08% \pm 0.01%, is comparable to those of PWNe found in the Milky Way. The detection of a PWN at such a large distance is possible due to the pulsar's favourable spin-down luminosity and a bright infrared photon-field serving as an inverse-Compton-scattering target for accelerated leptons. By applying a calorimetric technique to these observations, the pulsar's birth period is estimated to be shorter than 10 ms.
%G English
%Z HESS
%L in2p3-00725528
%U https://hal.in2p3.fr/in2p3-00725528
%~ IN2P3
%~ OBSPM
%~ CEA
%~ UNIV-PARIS7
%~ X
%~ UNIV-SAVOIE
%~ UPMC
%~ UGA
%~ LAPP
%~ LLR
%~ LPNHE
%~ APC
%~ CNRS
%~ UNIV-MONTP2
%~ X-LLR
%~ X-DEP
%~ X-DEP-PHYS
%~ LUPM
%~ DSM-IRFU
%~ IRFU-APC
%~ PSL
%~ UPMC_POLE_2
%~ MIPS
%~ UNIV-MONTPELLIER
%~ CEA-DRF
%~ SORBONNE-UNIVERSITE
%~ LUPM_EMA
%~ SU-SCIENCES
%~ UNIV-PARIS
%~ UP-SCIENCES
%~ OBSPM-PSL
%~ USMB-COMUE
%~ SU-TI
%~ ALLIANCE-SU
%~ UM1-UM2
%~ LPNHE-2