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All-sky Search for Time-integrated Neutrino Emission from Astrophysical Sources with 7 yr of IceCube Data

  • Author(s): Aartsen, MG;
  • Abraham, K;
  • Ackermann, M;
  • Adams, J;
  • Aguilar, JA;
  • Ahlers, M;
  • Ahrens, M;
  • Altmann, D;
  • Andeen, K;
  • Anderson, T;
  • Ansseau, I;
  • Anton, G;
  • Archinger, M;
  • Argüelles, C;
  • Auffenberg, J;
  • Axani, S;
  • Bai, X;
  • Barwick, SW;
  • Baum, V;
  • Bay, R;
  • Beatty, JJ;
  • Tjus, JB;
  • Becker, KH;
  • Benzvi, S;
  • Berley, D;
  • Bernardini, E;
  • Bernhard, A;
  • Besson, DZ;
  • Binder, G;
  • Bindig, D;
  • Bissok, M;
  • Blaufuss, E;
  • Blot, S;
  • Bohm, C;
  • Börner, M;
  • Bos, F;
  • Bose, D;
  • Böser, S;
  • Botner, O;
  • Braun, J;
  • Brayeur, L;
  • Bretz, HP;
  • Bron, S;
  • Burgman, A;
  • Carver, T;
  • Casier, M;
  • Cheung, E;
  • Chirkin, D;
  • Christov, A;
  • Clark, K;
  • Classen, L;
  • Coenders, S;
  • Collin, GH;
  • Conrad, JM;
  • Cowen, DF;
  • Cross, R;
  • Day, M;
  • De André, JPAMD;
  • Clercq, CD;
  • Rosendo, EDP;
  • Dembinski, H;
  • Ridder, SD;
  • Desiati, P;
  • De Vries, KD;
  • De Wasseige, G;
  • De With, M;
  • Deyoung, T;
  • Díaz-Vélez, JC;
  • Lorenzo, VD;
  • Dujmovic, H;
  • Dumm, JP;
  • Dunkman, M;
  • Eberhardt, B;
  • Ehrhardt, T;
  • Eichmann, B;
  • Eller, P;
  • Euler, S;
  • Evenson, PA;
  • Fahey, S;
  • Fazely, AR;
  • Feintzeig, J;
  • Felde, J;
  • Filimonov, K;
  • Finley, C;
  • Flis, S;
  • Fösig, CC;
  • Franckowiak, A;
  • Friedman, E;
  • Fuchs, T;
  • Gaisser, TK;
  • Gallagher, J;
  • Gerhardt, L;
  • Ghorbani, K;
  • Giang, W;
  • Gladstone, L;
  • Glauch, T;
  • Glüsenkamp, T;
  • Goldschmidt, A;
  • Golup, G;
  • Gonzalez, JG
  • et al.
Abstract

Since the recent detection of an astrophysical flux of high-energy neutrinos, the question of its origin has not yet fully been answered. Much of what is known about this flux comes from a small event sample of high neutrino purity, good energy resolution, but large angular uncertainties. In searches for point-like sources, on the other hand, the best performance is given by using large statistics and good angular reconstructions. Track-like muon events produced in neutrino interactions satisfy these requirements. We present here the results of searches for point-like sources with neutrinos using data acquired by the IceCube detector over 7 yr from 2008 to 2015. The discovery potential of the analysis in the northern sky is now significantly below E2v doφ/dEv = 10-12 TeV cm-2 s-1, on average 38% lower than the sensitivity of the previously published analysis of 4 yr exposure. No significant clustering of neutrinos above background expectation was observed, and implications for prominent neutrino source candidates are discussed.

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