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Mathieu Ribordy

Cette personne n’est plus à l’EPFL

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Publications associées (79)

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

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

We present the results of a search for high-energy muon neutrinos with the IceCube detector in coincidence with the Crab Nebula flare reported on 2010 September by various experiments. Due to the unusual flaring state of the otherwise steady source we perf ...

2012

OBSERVATION OF ANISOTROPY IN THE GALACTIC COSMIC-RAY ARRIVAL DIRECTIONS AT 400 TeV WITH ICECUBE

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

In this paper we report the first observation in the Southern hemisphere of an energy dependence in the Galactic cosmic-ray anisotropy up to a few hundred TeV. This measurement was performed using cosmic-ray-induced muons recorded by the partially deployed ...

2012

FACT - The First G-APD Cherenkov Telescope (first results)

Mathieu Ribordy, Thomas Günther Bretz, Werner Lustermann

In October 2011, the first air-Cherenkov telescope utilizing Geiger-mode avalanche photodiodes commenced operations. The silicon-based devices display several advantages compared to classical photomultiplier tubes allowing for a more compact camera design ...

Amer Inst Physics2012

Multiyear search for dark matter annihilations in the Sun with the AMANDA-II and IceCube detectors

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

A search for an excess of muon neutrinos from dark matter annihilations in the Sun has been performed with the AMANDA-II neutrino telescope using data collected in 812 days of live time between 2001 and 2006 and 149 days of live time collected with the AMA ...

American Physical Society2012

Search for ultrahigh-energy tau neutrinos with IceCube

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

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 ...

American Physical Society2012

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

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

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

Searches For Periodic Neutrino Emission From Binary Systems With 22 And 40 Strings Of Icecube

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

In this paper, we present the results of searches for periodic neutrino emission from a catalog of binary systems. Such modulation, observed in the photon flux, would be caused by the geometry of these systems. In the analysis, the period is fixed by these ...

2012

Search for dark matter from the Galactic halo with the IceCube Neutrino Telescope

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

Self-annihilating or decaying dark matter in the Galactic halo might produce high energy neutrinos detectable with neutrino telescopes. We have conducted a search for such a signal using 276 days of data from the IceCube 22-string configuration detector ac ...

American Physical Society2011

Measurement of acoustic attenuation in South Pole ice

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen

Using the South Pole Acoustic Test Setup (SPATS) and a retrievable transmitter deployed in holes drilled for the IceCube experiment, we have measured the attenuation of acoustic signals by South Pole ice at depths between 190 m and 500 m. Three data sets, ...

2011

OBSERVATION OF ANISOTROPY IN THE ARRIVAL DIRECTIONS OF GALACTIC COSMIC RAYS AT MULTIPLE ANGULAR SCALES WITH IceCube

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

Between 2009 May and 2010 May, the IceCube neutrino detector at the South Pole recorded 32 billion muons generated in air showers produced by cosmic rays with a median energy of 20 TeV. With a data set of this size, it is possible to probe the southern sky ...

2011

Acoustic resonant sensor for ultra high energy neutrino detection

Mathieu Ribordy, Reto Frei

The characterization of the cosmogenic neutrino flux would give insights into cosmological source evolution, source spectra and composition at injection, through the partial recovery of the degraded information carried by the ultra high energy cosmic rays. ...

2011

TIME-INTEGRATED SEARCHES FOR POINT-LIKE SOURCES OF NEUTRINOS WITH THE 40-STRING IceCube DETECTOR

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

We present the results of time-integrated searches for astrophysical neutrino sources in both the northern and southern skies. Data were collected using the partially completed IceCube detector in the 40-string configuration recorded between 2008 April 5 a ...

2011

Search for a diffuse flux of astrophysical muon neutrinos with the IceCube 40-string detector

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

The IceCube Neutrino Observatory is a 1 km(3) detector currently taking data at the South Pole. One of the main strategies used to look for astrophysical neutrinos with IceCube is the search for a diffuse flux of high-energy neutrinos from unresolved sourc ...

American Physical Society2011

Constraints on the extremely-high energy cosmic neutrino flux with the IceCube 2008-2009 data

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

We report on a search for extremely-high energy neutrinos with energies greater than 10(6) GeV using the data taken with the IceCube detector at the South Pole. The data was collected between April 2008 and May 2009 with the half-completed IceCube array. T ...

American Physical Society2011

Measurement of the atmospheric neutrino energy spectrum from 100 GeV to 400 TeV with IceCube

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

A measurement of the atmospheric muon neutrino energy spectrum from 100 GeV to 400 TeV was performed using a data sample of about 18 000 up-going atmospheric muon neutrino events in IceCube. Boosted decision trees were used for event selection to reject mi ...

American Physical Society2011

Constraints on high-energy neutrino emission from SN 2008D

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

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

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

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

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

IceCube sensitivity for low-energy neutrinos from nearby supernovae

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen, Matthias Wolf

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

Search for neutrino-induced cascades with five years of AMANDA data

Xiaoxia Bai, Mathieu Ribordy, Shirit Cohen

We report on the search for electromagnetic and hadronic showers ("cascades") produced by a diffuse flux of extraterrestrial neutrinos in the AMANDA neutrino telescope. Data for this analysis were recorded during 1001 days of detector livetime in the years ...

2011

Design concepts for the Cherenkov Telescope Array CTA: an advanced facility for ground-based high-energy gamma-ray astronomy

Pablo Roberto Ristori, Christophe Bauer, Francisco Sanchez, Céline Tchernin, Mathieu Ribordy, Steve Couturier, Thomas Günther Bretz, Etienne Antoine Julien Moulin, Bruno Garcia

Ground-based gamma-ray astronomy has had a major breakthrough with the impressive results obtained using systems of imaging atmospheric Cherenkov telescopes. Ground-based gamma-ray astronomy has a huge potential in astrophysics, particle physics and cosmol ...

2011

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