Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 79, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-019-6680-0
Keywords
-
Categories
Funding
- USA - U.S. National Science Foundation-Office of Polar Programs
- USA - U.S. National Science Foundation-Physics Division
- USA - Wisconsin Alumni Research Foundation
- USA - Center for High Throughput Computing (CHTC) at the University of Wisconsin-Madison
- USA - Open Science Grid (OSG)
- USA - Extreme Science and Engineering Discovery Environment (XSEDE)
- USA - U.S. Department of Energy-National Energy Research Scientific Computing Center
- USA - Particle astrophysics research computing center at the University of Maryland
- USA - Institute for Cyber-Enabled Research at Michigan State University
- USA - Astroparticle physics computational facility at Marquette University
- Belgium - Funds for Scientific Research (FRS-FNRS)
- Belgium - Funds for Scientific Research (FWO)
- Belgium - FWO Odysseus programme
- Belgium - FWO Big Science programme
- Belgium - Belgian Federal Science Policy Office (Belspo)
- Germany - Bundesministerium fur Bildung und Forschung (BMBF)
- Germany - Deutsche Forschungsgemeinschaft (DFG)
- Germany - Helmholtz Alliance for Astroparticle Physics (HAP)
- Germany - Initiative and Networking Fund of the Helmholtz Association
- Germany - Deutsches Elektronen Synchrotron (DESY)
- Germany - High Performance Computing cluster of the RWTH Aachen
- Sweden - Swedish Research Council
- Sweden - Swedish Polar Research Secretariat
- Sweden - Swedish National Infrastructure for Computing (SNIC)
- Sweden - Knut and Alice Wallenberg Foundation
- Australia - Australian Research Council
- Canada - Natural Sciences and Engineering Research Council of Canada
- Canada - Calcul Quebec
- Canada - Compute Ontario
- Canada - Canada Foundation for Innovation
- Canada - WestGrid
- Canada - Compute Canada
- Denmark - Villum Fonden
- Denmark - Danish National Research Foundation (DNRF)
- Denmark - Carlsberg Foundation
- New Zealand - Marsden Japan - Japan Society for Promotion of Science (JSPS)
- New Zealand - Institute for Global Prominent Research (IGPR) of Chiba University
- Korea - National Research Foundation of Korea (NRF)
- Switzerland - Swiss National Science Foundation (SNSF)
- STFC [ST/P006892/1, ST/S006176/1, ST/P000770/1] Funding Source: UKRI
Ask authors/readers for more resources
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 approximate to 1 degrees at 1 TeV and improves to approximate to 0.3 degrees 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 approximate to 35% assuming an E-2 spectrum. The sensitivity on the muon-neutrino flux is at a level of E2dN/dE=310-13s-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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available