{"paper":{"title":"First observation of PeV-energy neutrinos with IceCube","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"A. Bernhard, A. Christov, A. Fedynitch, A. Franckowiak, A. Goldschmidt, A. Gro{\\ss}, A. Haj Ismail, A. Hallgren, A. H. Cruz Silva, A. Homeier, A. Ishihara, A. Kappes, A. Karle, A. M. Brown, A. Obertacke, A. Olivas, A. O'Murchadha, A. R. Fazely, A. Sch\\\"onwald, A. Schukraft, A. Stasik, A. St\\\"o{\\ss}l, A. Tamburro, A. Van Overloop, A. Zilles, B. Christy, B. Eberhardt, B. Kaminsky, B. Riedel, B. Ruzybayev, C. Bohm, C. De Clercq, C. Finley, C. Ha, Ch. Weaver, C. H. Wiebusch, C. Kopper, C. P\\'erez de los Heros, C. Pfendner, C. Rott, C. Sheremata, C. Spiering, C. Walck, C. Wendt, C. Xu, D. Altmann, D. Berley, D. Bertrand, D. Bindig, D. Bose, D. Chirkin, D. F. Cowen, D. G\\'ora, D. Grant, D. Heereman, D. Heinen, D. J. Boersma, D. J. Koskinen, D. L. Xu, D. Pieloth, D. R. Nygren, D. R. Williams, D. Ryckbosch, D. Seckel, D. Soldin, D. van der Drift, D. Z. Besson, E. A. Strahler, E. Bernardini, E. Blaufuss, E. Jacobi, E. Middell, E. Pinat, E. Resconi, F. Clevermann, F. Halzen, F. Kislat, F. McNally, F. Scheriau, G. Binder, G. C. Hill, G. Golup, G. Kohnen, G. Kroll, G. M. Spiczak, G. S. Japaridze, G. Te\\v{s}i\\'c, G. T. Przybylski, G. W. Sullivan, G. Yodh, H.-G. Sander, H. Kolanoski, H. Landsman, H. Niederhausen, H.-P. Bretz, H. S. Matis, H. Taavola, H. Wissing, IceCube Collaboration: M. G. Aartsen, I. Taboada, J. A. Aguilar, J. Adams, J. A. Goodman, J. A. Pepper, J. Auffenberg, J. Becker Tjus, J. Berdermann, J. Blumenthal, J. Brunner, J. Casey, J. C. Davis, J. C. D\\'iaz-V\\'elez, J. Daughhetee, J. Eisch, J. Feintzeig, J. Gallagher, J. G. Gonzalez, J.-H. K\\\"ohne, J. Jacobsen, J. J. Beatty, J. Kiryluk, J. Kl\\\"as, J. Kunnen, J. Leute, J. L. Kelley, J. L\\\"unemann, J. Madsen, J. Miller, J. Posselt, J. P. Rodrigues, J. P. Yanez, J. van Santen, J. Ziemann, K. Clark, K. D. Hoffman, K. Filimonov, K. Frantzen, K. Hanson, K.-H. Becker, K. Helbing, K. Hoshina, K. Hultqvist, K. Jagielski, K. Jero, K. Krings, K. Mase, K. Meagher, K. Rawlins, K. Schatto, K. Wiebe, K. Woschnagg, L. Brayeur, L. Gerhardt, L. Gladstone, L. K\\\"opke, L. Mohrmann, L. Paul, L. R\\\"adel, L. Schulte, M. Ackermann, M. Ahlers, M. Baker, M. Bell, M. Bissok, M. Carson, M. Casier, M. Danninger, M. de With, M. Dunkman, M. Gurtner, M. J. Larson, M. Kowalski, M. Krasberg, M. Labare, M. L. Benabderrahmane, M. Lesiak-Bzdak, M. Leuermann, M. Merck, M. Olivo, M. Rameez, M. Ribordy, M. Richman, M. Santander, M. Scheel, M. Schmitz, M. Soiron, M. Stamatikos, M. Usner, M. Vehring, M. Voge, M. Vraeghe, M. Wallraff, M. Wellons, M. W. E. Smith, M. Wolf, M. Zoll, N. Kurahashi, N. Milke, N. Pirk, N. van Eijndhoven, N. Whitehorn, O. Botner, O. Fadiran, O. Jlelati, O. Schulz, P. A. Evenson, P. A. Toale, P. Berghaus, P. B. Price, P. Desiati, P. Hallen, P. M\\'esz\\'aros, P. O. Hulth, P. Redl, P. Zarzhitsky, R. Abbasi, R. Bay, R. Bruijn, R. Eagan, R. Franke, R. G. Stokstad, R. Hellauer, R. Hoffmann, R. Maruyama, R. Morse, R. Nahnhauer, R. Reimann, R. Str\\\"om, R. Wasserman, R. W. Ellsworth, S. Bechet, S. BenZvi, S. Bohaichuk, S. B\\\"oser, S. C. Nowicki, S. Coenders, S. Cohen, S. De Ridder, S. Euler, S. Flis, S. Hickford, S. Hussain, S. Kopper, S. Miarecki, S. M. Saba, S. Odrowski, S. R. Klein, S. Sarkar, S. Schoenen, S. Sch\\\"oneberg, S. Seunarine, S. Ter-Antonyan, S. Tilav, S. Toscano, S. W. Barwick, S. Westerhoff, S. Yoshida, S. Zierke, T. DeYoung, T. Feusels, T. Fischer-Wasels, T. Fuchs, T. Gl\\\"usenkamp, T. Karg, T. K. Gaisser, T. Kuwabara, T. Meures, T. Montaruli, T. Ruhe, T. R. Wood, T. Salameh, T. Schmidt, T. Stanev, T. Stezelberger, T. Waldenmaier, U. Naumann, V. Baum, W. Huelsnitz, W. Rhode, X. Bai, X. W. Xu, Y. Abdou, Y. Sestayo","submitted_at":"2013-04-19T09:33:02Z","abstract_excerpt":"We report on the observation of two neutrino-induced events which have an estimated deposited energy in the IceCube detector of 1.04 $\\pm$ 0.16 and 1.14 $\\pm$ 0.17 PeV, respectively, the highest neutrino energies observed so far. These events are consistent with fully contained particle showers induced by neutral-current $\\nu_{e,\\mu,\\tau}$ ($\\bar\\nu_{e,\\mu,\\tau}$) or charged-current $\\nu_{e}$ ($\\bar\\nu_{e}$) interactions within the IceCube detector. The events were discovered in a search for ultra-high energy neutrinos using data corresponding to 615.9 days effective livetime. 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