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Title: Search for steady point-like sources in the astrophysical muon neutrino flux with 8 years of IceCube data

Journal Article · · European Physical Journal. C, Particles and Fields
 [1];  [2];  [1];  [3];  [4];  [5];  [6];  [7];  [8];  [3];  [6];  [9];  [10];  [9];  [10];  [1];  [11];  [12];  [13];  [14] more »;  [15];  [16];  [17];  [18];  [19];  [20];  [21];  [2];  [22];  [23]; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
  1. Univ. of Canterbury, Christchurch (New Zealand). Dept. of Physics and Astronomy
  2. DESY, Zeuthen (Germany)
  3. Univ. Libre de Bruxelles, Brussels (Belgium). Science Faculty CP230
  4. Univ. of Copenhagen (Denmark). The Niels Bohr Inst.
  5. Stockholm Univ. (Sweden). Oskar Klein Centre, Dept. of Physics
  6. Friedrich Alexander Univ., Erlangen (Germany). Erlangen Centre for Astroparticle Physics
  7. Marquette Univ., Milwaukee, WI (United States). Dept. of Physics
  8. Pennsylvania State Univ., University Park, PA (United States). Dept of Physics
  9. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics
  10. RWTH Aachen Univ. (Germany). Physikalisches Inst.
  11. South Dakota School of Mines and Technology, Rapid City, SD (United States). Physics Dept.
  12. Univ. de Geneve (Switzerland). Dept. de Physique Nucleaire et Corpusclaire
  13. Univ. of Alberta, Edmonton, AB (Canada). Dept. of Physics
  14. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
  15. Univ. of Mainz (Germany). Inst. of Physics
  16. Univ. of California, Berkeley, CA (United States). Dept. of Physics
  17. The Ohio State Univ., Columbus, OH (United States). Dept of Physics; The Ohio State Univ., Columbus, OH (United States). Center for Cosmology and Astro-Particle Physics; The Ohio State Univ., Columbus, OH (United States). Dept. of Astronomy
  18. Ruhr Univ., Bochum (Germany). Fakultat fur Physik & Astronomie
  19. Univ. of Wuppertal (Germany). Dept. of Physics
  20. Univ. of Rochester, NY (United States). Dept. of Physics and Astronomy
  21. Univ. of Maryland, College Park, MD (United States). Dept. of Physics
  22. Univ. of Kansas, Lawrence, KS (United States). Dept. of Physics and Astronomy
  23. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
+ Show Author Affiliations

© 2019, The Author(s). The IceCube Collaboration has observed a high-energy astrophysical neutrino flux and recently found evidence for neutrino emission from the blazar TXS 0506+ 056. These results open a new window into the high-energy universe. However, the source or sources of most of the observed flux of astrophysical neutrinos remains uncertain. Here, a search for steady point-like neutrino sources is performed using an unbinned likelihood analysis. The method searches for a spatial accumulation of muon-neutrino events using the very high-statistics sample of about 497,000 neutrinos recorded by IceCube between 2009 and 2017. The median angular resolution is ~ 1° at 1 TeV and improves to ~ 0. 3° for neutrinos with an energy of 1 PeV. Compared to previous analyses, this search is optimized for point-like neutrino emission with the same flux-characteristics as the observed astrophysical muon-neutrino flux and introduces an improved event-reconstruction and parametrization of the background. The result is an improvement in sensitivity to the muon-neutrino flux compared to the previous analysis of ~ 35 % assuming an E-2 spectrum. The sensitivity on the muon-neutrino flux is at a level of E2dN/dE=3·10-13TeVcm-2s-1. No new evidence for neutrino sources is found in a full sky scan and in an a priori candidate source list that is motivated by gamma-ray observations. Furthermore, no significant excesses above background are found from populations of sub-threshold sources. The implications of the non-observation for potential source classes are discussed.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC)
Contributing Organization:
IceCube Collaboration
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1530434
Alternate ID(s):
OSTI ID: 1564018
Journal Information:
European Physical Journal. C, Particles and Fields, Vol. 79, Issue 3; ISSN 1434-6044
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 61 works
Citation information provided by
Web of Science

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Cited By (18)

Broadband characterisation of the very intense TeV flares of the blazar 1ES 1959+650 in 2016 journal June 2020
Can the ANITA anomalous events be due to new physics? journal July 2019
Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC journal January 2020
Time-Integrated Neutrino Source Searches with 10 Years of IceCube Data journal February 2020
Monitoring and Multi-Messenger Astronomy with IceCube journal March 2019
Complementarity of Stacking and Multiplet Constraints on the Blazar Contribution to the Cumulative High-energy Neutrino Intensity journal February 2020
New Hard-TeV Extreme Blazars Detected with the MAGIC Telescopes journal February 2020
GeV–TeV Counterparts of SS 433/W50 from Fermi -LAT and HAWC Observations journal January 2020
Broadband characterisation of the very intense TeV flares of the blazar 1ES 1959+650 in 2016 text January 2020
Monitoring and Multi-Messenger Astronomy with IceCube text January 2019
Time-integrated Neutrino Source Searches with 10 years of IceCube Data text January 2020
New Hard-TeV Extreme Blazars Detected with the MAGIC Telescopes text January 2020
Complementarity of Stacking and Multiplet Constraints on the Blazar Contribution to the Cumulative High-Energy Neutrino Intensity text January 2019
Can the ANITA anomalous events be due to new physics? text January 2019
Time-integrated Neutrino Source Searches with 10 years of IceCube Data text January 2019
New hard-TeV extreme blazars detected with the MAGIC telescopes text January 2019
GeV-TeV Counterparts of SS 433/W50 from Fermi-LAT and HAWC Observations text January 2020
Broadband characterisation of the very intense TeV flares of the blazar 1ES 1959+650 in 2016 text January 2020

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