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Journal article
Search for Multi-flare Neutrino Emissions in 10 yr of IceCube Data from a Catalog of Sources
Astrophysical journal. Letters, v 920(2), pL45
2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
A recent time-integrated analysis of a catalog of 110 candidate neutrino sources revealed a cumulative neutrino excess in the data collected by IceCube between 2008 April 6 and 2018 July 10. This excess, inconsistent with the background hypothesis in the Northern Hemisphere at the 3.3σ level, is associated with four sources: NGC 1068, TXS 0506+056, PKS 1424+240, and GB6 J1542+6129. This Letter presents two time-dependent neutrino emission searches on the same data sample and catalog: a point-source search that looks for the most significant time-dependent source of the catalog by combining space, energy, and time information of the events, and a population test based on binomial statistics that looks for a cumulative time-dependent neutrino excess from a subset of sources. Compared to previous time-dependent searches, these analyses enable a feature to possibly find multiple flares from a single direction with an unbinned maximum-likelihood method. M87 is found to be the most significant time-dependent source of this catalog at the level of 1.7σ post-trial, and TXS 0506+056 is the only source for which two flares are reconstructed. The binomial test reports a cumulative time-dependent neutrino excess in the Northern Hemisphere at the level of 3.0σ associated with four sources: M87, TXS 0506+056, GB6 J1542+6129, and NGC 1068.
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Details
- Title
- Search for Multi-flare Neutrino Emissions in 10 yr of IceCube Data from a Catalog of Sources
- Creators
- Maryon Ahrens - Oskar Klein-centrum för kosmopartikelfysik (OKC)Kunal Deoskar - Oskar Klein-centrum för kosmopartikelfysik (OKC)Chad Finley - Oskar Klein-centrum för kosmopartikelfysik (OKC)Klas Hultqvist - Oskar Klein-centrum för kosmopartikelfysik (OKC)Matti Jansson - Oskar Klein-centrum för kosmopartikelfysik (OKC)Christian Walck - Oskar Klein-centrum för kosmopartikelfysik (OKC)IceCube Collaboration
- Publication Details
- Astrophysical journal. Letters, v 920(2), pL45
- Publisher
- Institute of Physics (IOP)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000710436900001
- Scopus ID
- 2-s2.0-85118268085
- Other Identifier
- 991019168462804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics