Discovery of powerful gamma-ray flares from the Crab Nebula.

@article{Tavani2011DiscoveryOP,
  title={Discovery of powerful gamma-ray flares from the Crab Nebula.},
  author={M. D. Carol Tavani and Andrea Bulgarelli and V. Vittorini and Alberto Pellizzoni and E. Striani and Patrizia A Caraveo and Martin C. Weisskopf and Allyn Tennant and G. Pucella and A. Trois and Edgardo Costa and Yuri Evangelista and Carlotta Pittori and Francesco Verrecchia and E. Del Monte and Riccardo Campana and M C Pilia and Andrea De Luca and Immacolata Donnarumma and Dieter Horns and Carlo Ferrigno and Craig O. Heinke and Massimo Trifoglio and Fabiola Gianotti and Stefano Vercellone and Andrea Argan and Guido Barbiellini and Paolo Walter Cattaneo and Alexander W. Chen and T. Contessi and Filippo D'Ammando and G DePris and G Di Cocco and G. Di Persio and Marco Feroci and A. Ferrari and Marco Galli and Andrea Giuliani and Matteo Giusti and Claudio Labanti and I. Lapshov and Felipe B. Lazzarotto and Paolo Lipari and Francesco Longo and Fabio Fuschino and Martino Marisaldi and Sandro Mereghetti and Ennio Morelli and Elena Moretti and Aldo Morselli and Luigi Pacciani and Francesco Perotti and Giuseppe Piano and Piergiorgio Picozza and Michela Prest and Massimo Rapisarda and A. Rappoldi and Andrea Rubini and Sabina Sabatini and Paolo Soffitta and Erik Vallazza and A. Zambra and Danilo Mathias Zanello and Francesca Lucarelli and Patrizia Santolamazza and Paolo Giommi and L. Salotti and Giovanni F. Bignami},
  journal={Science},
  year={2011},
  volume={331 6018},
  pages={736-9}
}
The well-known Crab Nebula is at the center of the SN1054 supernova remnant. It consists of a rotationally powered pulsar interacting with a surrounding nebula through a relativistic particle wind. The emissions originating from the pulsar and nebula have been considered to be essentially stable. Here, we report the detection of strong gamma-ray (100 mega-electron volts to 10 giga-electron volts) flares observed by the AGILE satellite in September 2010 and October 2007. In both cases, the total… CONTINUE READING
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