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An extremely bright gamma-ray pulsar in the Large Magellanic Cloud

M. Ackermann A. Albert L. Baldini Jean Ballet Guido Barbiellini C. Barbieri 1 D. Bastieri R. Bellazzini E. Bissaldi R. Bonino E. Bottacini T. J. Brandt J. Bregeon 2 Pascal Bruel 3 R. Buehler G. A. Caliandro R. A. Cameron P. A. Caraveo C. Cecchi E. Charles A. Chekhtman C. C. Cheung J. Chiang G. Chiaro S. Ciprini J. Cohen-Tanugi 2 A. Cuoco S. Cutini F. d'Ammando F. D. P. R. Desiante S. W. Digel L. Di Venere P. S. Drell C. Favuzzi S. J. Fegan 3 E. C. Ferrara A. Franckowiak S. Funk P. Fusco F. Gargano D. Gasparrini N. Giglietto F. Giordano G. Godfrey I. A. Grenier M.- H. Grondin 4 J. E. Grove Lucas Guillemot 5, 6 S. Guiriec K. Hagiwara A. K. Harding 7 E. Hays J. W. Hewitt A. B. Hill D. Horan 3 T. J. Johnson 8 J. Knodlseder M. Kuss S. Larsson L. Latronico M. Lemoine-Goumard 4 J. Li L. Li F. Longo F. Loparco M. N. Lovellette P. Lubrano S. Maldera A. Manfreda F. Marshall 7 P. Martin 9 M. Mayer M. N. Mazziotta P. F. Michelson N. Mirabal T. Mizuno M. E. Monzani A. Morselli I. V. Moskalenko S. Murgia G. Naletto E. Nuss 2 T. Ohsugi M. Orienti E. Orlando D. Paneque M. Pesce-Rollins F. Piron 2 G. Pivato T. A. Porter S. Raino R. Rando M. Razzano A. Reimer O. Reimer T. Reposeur 4 R. W. Romani P. M. S. Parkinson A. Schulz C. Sgro E. J. Siskind D. A. Smith 4 F. Spada G. Spandre P. Spinelli D. J. Suson H. Takahashi J. B. Thayer D. J. Thompson L. Tibaldo D. F. Torres Y. Uchiyama G. Vianello K. S. Wood M. Wood L. Zampieri
Abstract : Pulsars are rapidly spinning, highly magnetized neutron stars, created in the gravitational collapse of massive stars. We report the detection of pulsed giga–electron volt gamma rays from the young pulsar PSR J0540–6919 in the Large Magellanic Cloud, a satellite galaxy of the Milky Way. This is the first gamma-ray pulsar detected in another galaxy. It has the most luminous pulsed gamma-ray emission yet observed, exceeding the Crab pulsar’s by a factor of 20. PSR J0540–6919 presents an extreme test case for understanding the structure and evolution of neutron star magnetospheres.
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M. Ackermann, A. Albert, L. Baldini, Jean Ballet, Guido Barbiellini, et al.. An extremely bright gamma-ray pulsar in the Large Magellanic Cloud. Science, American Association for the Advancement of Science, 2015, 350 (6262), pp.801-805. ⟨10.1126/science.aac7400⟩. ⟨insu-01370003⟩

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