"0004-6361" . "Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N 157B with HESS"@en . . "Acero, F." . "Brucker, J." . "Anton, G." . "5"^^ . "Chadwick, P. M." . "Becherini, Y." . . . "197"^^ . . "[E6E01AD8F550]" . . "We present the significant detection of the first extragalactic pulsar wind nebula (PWN) detected in gamma rays, N 157B, 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. N 157B is associated with PSR J0537-6910, 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 +/- 0.2(stat) +/- 0.3(syst) and a normalisation at 1 TeV of (8.2 +/- 0.8(stat) +/- 2.5(syst)) x 10(-13) cm(-2) s(-1) TeV-1. A leptonic multi-wavelength model shows that an energy of about 4 x 10(49) erg is stored in electrons and positrons. The apparent efficiency, which is the ratio of the TeV gamma-ray luminosity to the pulsar's spin-down luminosity, 0.08% +/- 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."@en . . "Rob, Ladislav" . . "Biteau, J." . "Charbonnier, A." . . "Bochow, A." . "Brun, F." . "1" . "HESS; with; 157B; nebula; wind; pulsar; extragalactic; emission; gamma-ray; Discovery"@en . "Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N 157B with HESS" . "Akhperjanian, A. G." . "Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N 157B with HESS" . "Boisson, C." . "Aharonian, F." . . . "Carrigan, S." . "I, P(GPP203/11/P363), Z(MSM0021620859)" . "Bernloehr, K." . . . "http://dx.doi.org/10.1051/0004-6361/201219906" . "Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N 157B with HESS"@en . . . "Balenderan, S." . "000309254900158" . "RIV/00216208:11320/12:10127206" . "131462" . "Cerruti, M." . "Cheesebrough, A." . . "Birsin, E." . . . "Bolmont, J." . "We present the significant detection of the first extragalactic pulsar wind nebula (PWN) detected in gamma rays, N 157B, 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. N 157B is associated with PSR J0537-6910, 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 +/- 0.2(stat) +/- 0.3(syst) and a normalisation at 1 TeV of (8.2 +/- 0.8(stat) +/- 2.5(syst)) x 10(-13) cm(-2) s(-1) TeV-1. A leptonic multi-wavelength model shows that an energy of about 4 x 10(49) erg is stored in electrons and positrons. The apparent efficiency, which is the ratio of the TeV gamma-ray luminosity to the pulsar's spin-down luminosity, 0.08% +/- 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." . "2"^^ . "Buesching, I." . "Nedbal, Dalibor" . "Balzer, A." . "545" . "Barnacka, A." . . "10.1051/0004-6361/201219906" . "Brun, P." . . "RIV/00216208:11320/12:10127206!RIV13-GA0-11320___" . "Bordas, P." . . "Bulik, T." . . . "Cologna, G." . "Becker, J." . . "11320" . . "DE - Spolkov\u00E1 republika N\u011Bmecko" . . . "Casanova, S." . "Abramowski, A." . "Chaves, R. C. G." . "Astronomy and Astrophysics" . .