Search for high energy GRB neutrinos in IceCube

dc.contributor.advisor Shoemaker, Deirdre
dc.contributor.author Casey, James David
dc.contributor.committeeMember Taboada, Ignacio
dc.contributor.committeeMember Cadonati, Laura
dc.contributor.committeeMember Steffes, Paul
dc.contributor.committeeMember Otte, Adam N.
dc.contributor.department Physics
dc.date.accessioned 2015-09-21T14:24:14Z
dc.date.available 2015-09-21T14:24:14Z
dc.date.created 2015-08
dc.date.issued 2015-05-14
dc.date.submitted August 2015
dc.date.updated 2015-09-21T14:24:14Z
dc.description.abstract The IceCube Neutrino Observatory has reported the observation of 35 neutrino events above 30 TeV with evidence for an astrophysical neutrino flux using data collected from May 2010 to May 2013. These events provide the first high-energy astrophysical neutrino flux ever observed. The sources of these events are currently unknown. IceCube has looked for correlations between these events and a list of TeV photon sources including a catalog of 36 galactic sources and 42 extragalactic sources, correlations with the galactic plane and center, and spatial and temporal clustering. These searches have shown no significant correlations. The isotropic distribution of the event directions gives indications that the events could be extragalactic in nature and therefore may originate in the same processes that generate ultra-high-energy cosmic rays (UHECRs). The sources of these UHECRs are still unknown; however, gamma-ray bursts (GRBs) have been proposed as one possible source class. By determining the source of these high-energy neutrinos, it may be possible to determine the sources of UHECRs as well. This study is a search for directional and temporal correlation between 856 GRBs and the astrophysical neutrino flux observed by IceCube. Nearly 10,000 expanding time windows centered on the earliest reported time of the burst were examined. The time windows start at ±10 s and extend to ±15 days. We find no evidence of correlations for these time windows and set an upper limit on the fraction of the astrophysical flux that can be attributed to the observed GRBs as a function of the time window. GRBs can contribute at most 12% of the astrophysical neutrino flux if the neutrino-GRB correlation time is less than ≈20 hours, and no more than 38% of the astrophysical neutrino flux can be attributed to the known GRBs at time scales up to 15 days. We conclude that GRBs observable by satellites are not solely responsible for IceCube’s astrophysical neutrino flux, even if very long correlation time scales are assumed.
dc.description.degree Ph.D.
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/53839
dc.language.iso en_US
dc.publisher Georgia Institute of Technology
dc.subject IceCube
dc.subject Neutrinos
dc.subject GRBs
dc.subject Gamma-ray bursts
dc.subject Astrophysics
dc.subject Particle astrophysics
dc.subject Astroparticle physics
dc.title Search for high energy GRB neutrinos in IceCube
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.corporatename College of Sciences
local.contributor.corporatename School of Physics
relation.isOrgUnitOfPublication 85042be6-2d68-4e07-b384-e1f908fae48a
relation.isOrgUnitOfPublication 2ba39017-11f1-40f4-9bc5-66f17b8f1539
thesis.degree.level Doctoral
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