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Full-Text Articles in Physics
A Search For Neutrino Emission From Fast Radio Bursts With Six Years Of Icecube Data, Karen Andeen
A Search For Neutrino Emission From Fast Radio Bursts With Six Years Of Icecube Data, Karen Andeen
Physics Faculty Research and Publications
We present a search for coincidence between IceCube TeV neutrinos and fast radio bursts (FRBs). During the search period from 2010 May 31 to 2016 May 12, a total of 29 FRBs with 13 unique locations have been detected in the whole sky. An unbinned maximum likelihood method was used to search for spatial and temporal coincidence between neutrinos and FRBs in expanding time windows, in both the northern and southern hemispheres. No significant correlation was found in six years of IceCube data. Therefore, we set upper limits on neutrino fluence emitted by FRBs as a function of time window …
Measurement Of Atmospheric Neutrino Oscillations At 6–56 Gev With Icecube Deepcore, Karen Andeen
Measurement Of Atmospheric Neutrino Oscillations At 6–56 Gev With Icecube Deepcore, Karen Andeen
Physics Faculty Research and Publications
We present a measurement of the atmospheric neutrino oscillation parameters using three years of data from the IceCube Neutrino Observatory. The DeepCore infill array in the center of IceCube enables the detection and reconstruction of neutrinos produced by the interaction of cosmic rays in Earth’s atmosphere at energies as low as ∼5 GeV. That energy threshold permits measurements of muon neutrino disappearance, over a range of baselines up to the diameter of the Earth, probing the same range of L/Eν as long-baseline experiments but with substantially higher-energy neutrinos. This analysis uses neutrinos from the full sky with reconstructed energies …
Multiwavelength Follow-Up Of A Rare Icecube Neutrino Multiplet, Karen Andeen
Multiwavelength Follow-Up Of A Rare Icecube Neutrino Multiplet, Karen Andeen
Physics Faculty Research and Publications
On February 17, 2016, the IceCube real-time neutrino search identified, for the first time, three muon neutrino candidates arriving within 100 s of one another, consistent with coming from the same point in the sky. Such a triplet is expected once every 13.7 years as a random coincidence of background events. However, considering the lifetime of the follow-up program the probability of detecting at least one triplet from atmospheric background is 32%. Follow-up observatories were notified in order to search for an electromagnetic counterpart. Observations were obtained by Swift’s X-ray telescope, by ASAS-SN, LCO and MASTER at optical wavelengths, …
Search For Astrophysical Sources Of Neutrinos Using Cascade Events In Icecube, Karen Andeen
Search For Astrophysical Sources Of Neutrinos Using Cascade Events In Icecube, Karen Andeen
Physics Faculty Research and Publications
The IceCube neutrino observatory has established the existence of a flux of high-energy astrophysical neutrinos, which is inconsistent with the expectation from atmospheric backgrounds at a significance greater than 5σ. This flux has been observed in analyses of both track events from muon neutrino interactions and cascade events from interactions of all neutrino flavors. Searches for astrophysical neutrino sources have focused on track events due to the significantly better angular resolution of track reconstructions. To date, no such sources have been confirmed. Here we present the first search for astrophysical neutrino sources using cascades interacting in IceCube with …
All-Sky Search For Time-Integrated Neutrino Emission From Astrophysical Sources With 7 Yr Of Icecube Data, Karen Andeen
All-Sky Search For Time-Integrated Neutrino Emission From Astrophysical Sources With 7 Yr Of Icecube Data, Karen Andeen
Physics Faculty Research and Publications
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 …
The Contribution Of Fermi-2lac Blazars To Diffuse Tev-Pev Neutrino Flux, Karen Andeen
The Contribution Of Fermi-2lac Blazars To Diffuse Tev-Pev Neutrino Flux, Karen Andeen
Physics Faculty Research and Publications
The recent discovery of a diffuse cosmic neutrino flux extending up to PeV energies raises the question of which astrophysical sources generate this signal. Blazars are one class of extragalactic sources which may produce such high-energy neutrinos. We present a likelihood analysis searching for cumulative neutrino emission from blazars in the 2nd Fermi-LAT AGN catalog (2LAC) using IceCube neutrino data set 2009-12, which was optimized for the detection of individual sources. In contrast to those in previous searches with IceCube, the populations investigated contain up to hundreds of sources, the largest one being the entire blazar sample in the …