학술논문

Searches for Neutrinos from Gamma-Ray Bursts Using the IceCube Neutrino Observatory
Document Type
article
Source
The Astrophysical Journal. 939(2)
Subject
Nuclear and Plasma Physics
Particle and High Energy Physics
Physical Sciences
CSD-01-AMOS-A
Astronomical and Space Sciences
Atomic
Molecular
Nuclear
Particle and Plasma Physics
Physical Chemistry (incl. Structural)
Astronomy & Astrophysics
Astronomical sciences
Particle and high energy physics
Space sciences
Language
Abstract
Gamma-ray bursts (GRBs) are considered as promising sources of ultra-high-energy cosmic rays (UHECRs) due to their large power output. Observing a neutrino flux from GRBs would offer evidence that GRBs are hadronic accelerators of UHECRs. Previous IceCube analyses, which primarily focused on neutrinos arriving in temporal coincidence with the prompt gamma-rays, found no significant neutrino excess. The four analyses presented in this paper extend the region of interest to 14 days before and after the prompt phase, including generic extended time windows and targeted precursor searches. GRBs were selected between 2011 May and 2018 October to align with the data set of candidate muon-neutrino events observed by IceCube. No evidence of correlation between neutrino events and GRBs was found in these analyses. Limits are set to constrain the contribution of the cosmic GRB population to the diffuse astrophysical neutrino flux observed by IceCube. Prompt neutrino emission from GRBs is limited to 21% of the observed diffuse neutrino flux, and emission on timescales up to 104 s is constrained to 24% of the total diffuse flux.