Publication: Search for Multi-flare Neutrino Emissions in 10 yr of IceCube Data from a Catalog of Sources
Дата
2021
Авторы
Abbasi, R.
Ackermann, M.
Adams, J.
Aguilar, J. A.
Besson, D. Z.
Spiering, C.
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© 2021. The American Astronomical Society. All rights reserved..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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Search for Multi-flare Neutrino Emissions in 10 yr of IceCube Data from a Catalog of Sources / Abbasi, R. [et al.] // Astrophysical Journal Letters. - 2021. - 920. - № 2. - 10.3847/2041-8213/ac2c7b
URI
https://www.doi.org/10.3847/2041-8213/ac2c7b
https://www.scopus.com/record/display.uri?eid=2-s2.0-85118268085&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000710436900001
https://openrepository.mephi.ru/handle/123456789/24834
https://www.scopus.com/record/display.uri?eid=2-s2.0-85118268085&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000710436900001
https://openrepository.mephi.ru/handle/123456789/24834