All-sky Search for Time-integrated Neutrino Emission from Astrophysical Sources with 7 yr of IceCube Data

作者：Aartsen M G^*; Abraham K; Ackermann M; Adams J; Aguilar J A; Ahlers M; Ahrens M; Altmann D; Andeen K; Anderson T; Ansseau I; Anton G; Archinger M; Arguelles C; Auffenberg J; Axani S; Bai X; Barwick S W; Baum V; Bay R; Beatty J J; Tjus J Becker; Becker K H; BenZvi S; Berley D; Bernardini E; Bernhard A; Besson D Z; Binder G; Bindig D; Bissok M; Blaufuss E; Blot S; Bohm C; Boerner M; Bos F; Bose D; Boeser S; Botner O

来源：Astrophysical Journal, 2017, 835(2): 151.

DOI：10.3847/1538-4357/835/2/151

• astroparticle physics
• galaxies: active
• neutrinos

Since the recent detection of an astrophysical flux of high-energy neutrinos, the question of its origin has not yet fully been answered. Much of what is known about this flux comes from a small event sample of high neutrino purity, good energy resolution, but large angular uncertainties. In searches for point-like sources, on the other hand, the best performance is given by using large statistics and good angular reconstructions. Track-like muon events produced in neutrino interactions satisfy these requirements. We present here the results of searches for point-like sources with neutrinos using data acquired by the IceCube detector over 7 yr from 2008 to 2015. The discovery potential of the analysis in the northern sky is now significantly below E(nu)(2)d phi/dE(nu) = 10(-12) TeV cm(-2) s(-1), on average 38% lower than the sensitivity of the previously published analysis of 4 yr exposure. No significant clustering of neutrinos above background expectation was observed, and implications for prominent neutrino source candidates are discussed.

• 出版日期2017-2-1
• 单位MIT; TU Dortmund