Search for neutrino sources from the direction of IceCube alert events
Martina Karl (for the IceCube Collaboration)

TL;DR
This study searches for additional neutrino emissions associated with IceCube alert events over 11 years, finding no significant excess but constraining the flux and analyzing a known blazar flare with results consistent with previous findings.
Contribution
It provides the first comprehensive search for steady and transient neutrino emission from IceCube alert directions using 11 years of data, setting flux limits and analyzing a notable blazar flare.
Findings
No significant additional neutrino emission detected.
Established upper limits on neutrino flux from all directions.
Confirmed properties of the TXS 0506+056 flare consistent with prior studies.
Abstract
We search for additional neutrino emission from the direction of IceCube's highest energy public alert events. We take the arrival direction of 122 events with a high probability of being of astrophysical origin and look for steady and transient emission. We investigate 11 years of reprocessed and recalibrated archival IceCube data. For the steady scenario, we investigate if the potential emission is dominated by a single strong source or by many weaker sources. In contrast, for the transient emission we only search for single sources. In both cases, we find no significant additional neutrino component. Not having observed any significant excess, we constrain the maximal neutrino flux coming from all 122 origin directions (including the high-energy events) to ~(TeV cm s) at 100~TeV, assuming an emission, with 90\%…
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Neutrino Physics Research · Radio Astronomy Observations and Technology
