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Neutrino Analysis Of The 2010 September Crab Nebula Flare And Time-Integrated Constraints On Neutrino Emission From The Crab Using Icecube

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An absence of neutrinos associated with cosmic-ray acceleration in gamma-ray bursts

Matthias Wolf, Shirit Cohen, Mathieu Ribordy, Xiaoxia Bai

Very energetic astrophysical events are required to accelerate cosmic rays to above 10(18) electronvolts. GRBs (c-ray bursts) have been proposed as possible candidate sources(1-3). In the GRB 'fireball' model, cosmic-ray acceleration should be accompanied ...

2012

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This paper presents four searches for flaring sources of neutrinos using the IceCube neutrino telescope. For the first time, a search is performed over the entire parameter space of energy, direction, and time with sensitivity to neutrino flares lasting be ...

2012

Neutrino Mass from Cosmology

Julien Lesgourgues

Neutrinos can play an important role in the evolution of the universe, modifying some of the cosmological observables. In this contribution we summarize the main aspects of cosmological relic neutrinos, and we describe how the precision of present cosmolog ...

Hindawi Publishing Corporation2012

Background studies for acoustic neutrino detection at the South Pole

Matthias Wolf, Shirit Cohen, Mathieu Ribordy, Xiaoxia Bai

The detection of acoustic signals from ultra-high energy neutrino interactions is a promising method to measure the flux of cosmogenic neutrinos expected on Earth. The energy threshold for this process depends strongly on the absolute noise level in the ta ...

2012

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The first dedicated search for ultrahigh-energy (UHE) tau neutrinos of astrophysical origin was performed using the IceCube detector in its 22-string configuration with an instrumented volume of roughly 0: 25 km(3). The search also had sensitivity to UHE e ...

2012

Searching for soft relativistic jets in core-collapse supernovae with the IceCube optical follow-up program

Matthias Wolf, Shirit Cohen, Mathieu Ribordy, Xiaoxia Bai

Context. Transient neutrino sources such as gamma-ray bursts (GRBs) and supernovae (SNe) are hypothesized to emit bursts of high-energy neutrinos on a time-scale of less than or similar to 100 s. While GRB neutrinos would be produced in high relativistic j ...

2012

Novel technique for supernova detection with IceCube

Mathieu Ribordy

The current supernova detection technique used in IceCube relies on the sudden deviation of the summed photomultiplier noise rate from its nominal value during the neutrino burst, making IceCube a approximate to 3 Megaton effective detection volume - class ...

2012

Constraints on high-energy neutrino emission from SN 2008D

Matthias Wolf, Shirit Cohen, Mathieu Ribordy, Xiaoxia Bai

SN 2008D, a core collapse supernova at a distance of 27 Mpc, was serendipitously discovered by the Swift satellite through an associated X-ray flash. Core collapse supernovae have been observed in association with long gamma-ray bursts and X-ray flashes an ...

2011

IceCube sensitivity for low-energy neutrinos from nearby supernovae

Matthias Wolf, Shirit Cohen, Mathieu Ribordy, Xiaoxia Bai

This paper describes the response of the IceCube neutrino telescope located at the geographic south pole to outbursts of MeV neutrinos from the core collapse of nearby massive stars. IceCube was completed in December 2010 forming a lattice of 5160 photomul ...

2011

Limits on Neutrino Emission from Gamma-Ray Bursts with the 40 String IceCube Detector

Matthias Wolf, Shirit Cohen, Mathieu Ribordy, Xiaoxia Bai

IceCube has become the first neutrino telescope with a sensitivity below the TeV neutrino flux predicted from gamma-ray bursts if gamma-ray bursts are responsible for the observed cosmic-ray flux above 10(18) eV. Two separate analyses using the half-comple ...

2011