期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 920, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/2041-8213/ac2c7b
关键词
-
资金
- USA-U.S. National Science Foundation-Office of Polar Programs
- U.S. National Science Foundation-Physics Division
- U.S. National Science Foundation-EPSCoR
- Wisconsin Alumni Research Foundation
- Center for High Throughput Computing (CHTC) at the University of Wisconsin-Madison
- Open Science Grid (OSG)
- Extreme Science and Engineering Discovery Environment (XSEDE)
- Frontera computing project at the Texas Advanced Computing Center
- U.S. Department of Energy-National Energy Research Scientific Computing Center
- Particle astrophysics research computing center at the University of Maryland
- Institute for Cyber-Enabled Research at Michigan State University
- Astroparticle physics computational facility at Marquette University
- Belgium-Funds for Scientific Research (FRS-FNRS)
- Belgium-Funds for Scientific Research (FWO)
- FWO Odysseus programme
- FWO Big Science programme
- 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
- Swedish Polar Research Secretariat
- Swedish National Infrastructure for Computing (SNIC)
- Knut and Alice Wallenberg Foundation
- Australia-Australian Research Council
- Canada-Natural Sciences and Engineering Research Council of Canada
- Calcul Quebec
- Compute Ontario
- Canada Foundation for Innovation
- WestGrid
- Compute Canada
- Denmark-Villum Fonden
- Carlsberg Foundation
- New Zealand-Marsden Fund
- Japan-Japan Society for Promotion of Science (JSPS)
- Institute for Global Prominent Research (IGPR) of Chiba University
- Korea-National Research Foundation of Korea (NRF)
- Switzerland-Swiss National Science Foundation (SNSF)
- United Kingdom-Department of Physics, University of Oxford
A recent study analyzed data collected by IceCube from 2008 to 2018 and found a cumulative neutrino excess associated with several sources. Among them, M87 was identified as the most significant time-dependent source, and TXS 0506+056 was the only source with two flares. Furthermore, a binomial test reported a cumulative neutrino excess in the Northern Hemisphere associated with four sources.
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 3.3 sigma 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 1.7 sigma 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 3.0 sigma associated with four sources: M87, TXS 0506+056, GB6 J1542+6129, and NGC 1068.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据