Journal article
Time-Integrated Neutrino Source Searches with 10 Years of IceCube Data
Physical review letters, v 124(5), 051103
2020
PMID: 32083934
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Abstract
This Letter presents the results from pointlike neutrino source searches using ten years of IceCube data collected between April 6, 2008 and July 10, 2018. We evaluate the significance of an astrophysical signal from a pointlike source looking for an excess of clustered neutrino events with energies typically above similar to 1 TeV among the background of atmospheric muons and neutrinos. We perform a full-sky scan, a search within a selected source catalog, a catalog population study, and three stacked Galactic catalog searches. The most significant point in the northern hemisphere from scanning the sky is coincident with the Seyfert II galaxy NGC 1068, which was included in the source catalog search. The excess at the coordinates of NGC 1068 is inconsistent with background expectations at the level of 2.9 sigma after accounting for statistical trials from the entire catalog. The combination of this result along with excesses observed at the coordinates of three other sources, including TXS 0506 + 056, suggests that, collectively, correlations with sources in the northern catalog are inconsistent with background at 3.3 sigma significance. The southern catalog is consistent with background. These results, all based on searches for a cumulative neutrino signal integrated over the 10 years of available data, motivate further study of these and similar sources, including time-dependent analyses, multimessenger correlations, and the possibility of stronger evidence with coming upgrades to the detector.
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Details
- Title
- Time-Integrated Neutrino Source Searches with 10 Years of IceCube Data
- Creators
- Maryon Ahrens - Oskar Klein-centrum för kosmopartikelfysik (OKC)Christian Bohm - Stockholm UniversityKunal Deoskar - Stockholm UniversityChad Finley - Stockholm UniversityKlas Hultqvist - Stockholm UniversityErin O'Sullivan - Oskar Klein-centrum för kosmopartikelfysik (OKC)Christian Walck - Stockholm UniversityLawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Publication Details
- Physical review letters, v 124(5), 051103
- Publisher
- Cold Spring Harbor Press
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000511450000004
- Scopus ID
- 2-s2.0-85079787816
- Other Identifier
- 991019169411004721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Physics, Multidisciplinary