1,724,796 research outputs found
ANTARES and KM3NeT: The Latest Results of the Neutrino Telescopes in the Mediterranean
No full textThe measurement of cosmic neutrinos is a new and unique method to observe the Universe. Neutrinos are chargeless, weakly-interacting particles that can provide information about the interior of an astrophysical object for cosmological distances. Indeed, they are a complementary probe with respect to other messengers such as multi-wavelength light and charged cosmic rays, allowing the observation of the far Universe and providing information on the production mechanism. Here, the neutrino telescopes in the Mediterranean Sea that are operating or in progress will be reviewed. The ANTARES (Astronomy with a Neutrino Telescope and Abyss environmental RESearch) detector is the largest neutrino telescope currently in operation in the Mediterranean Sea and the first operating in sea water. Some of the ANTARES results will be summarized, including diffuse, point-like, and multi-messenger source searches. Finally, the future km(3)-scale telescope KM3NeT (Cubic Kilometre Neutrino Telescope) will be described focusing on the expected performances and sensitivities
ANTARES completed: First selected results
No full textThe Antares collaboration completed the construction of the first deep sea neutrino telescope in the Northern hemisphere in May 2008. Antares is a 3D array of 900 photomultipliers held in the sea by twelve mooring lines anchored at a depth of 2500 m in the Mediterranean Sea 40 km off the southern French coast. The detection principle is based on the observation of Čerenkov light induced by charged particles produced in neutrino interactions in the matter surrounding the detector
Results of the follow-up of ANTARES neutrino alerts
No full textHigh-energy neutrinos could be produced in the interaction of charged cosmic rays with matter or radiation surrounding astrophysical sources. To look for transient sources associated with neutrino emission, a follow-up program of neutrino alerts has been operating within the ANTARES collaboration since 2009. This program, named TAToO, has triggered robotic optical telescopes (MASTER, TAROT, ROTSE and the SVOM ground based telescopes) immediately after the detection of any relevant neutrino candidate and scheduled several observations in the weeks following the detection. A subset of ANTARES events with highest probabilities of being of cosmic origin has also been followed by the Swift and the INTEGRAL satellites, the Murchison Widefield Array radio telescope and the H.E.S.S. high-energy gamma-ray telescope. The results of twelve years of observations are reported. In September 2015, ANTARES issued a neutrino alert and during the follow-up, a potential transient counterpart was identified by Swift and MASTER. A multi-wavelength follow-up campaign has allowed to identify the nature of this source and has proven its fortuitous association with the neutrino. No other optical and X-ray counterpart has been significantly associated with an ANTARES candidate neutrino signal. Constraints on transient neutrino emission have been set. The return of experience is particularly important for the design of the alert system of KM3NeT, the next generation neutrino telescope in the Mediterranean Sea
Searches for point-like neutrino sources with the ANTARES neutrino telescope
No full textANTARES is the largest undersea neutrino telescope currently in operation. This telescope has been taking data continuously since 2007 with the aim to detect neutrinos from astrophysical sources. A review of the point-like neutrino sources with the ANTARES telescope is presented. The latest results of the all-flavour neutrino point-source analysis with data from 2007 to 2013 and the results of the first combined ANTARES and IceCube analysis are described
ANTARES: the first undersea neutrino telescope
No full textThe ANTARES Neutrino Telescope was completed in May 2008 and is the first operational Neutrino Telescope in the Mediterranean Sea. The main purpose of the detector is to perform neutrino astronomy and the apparatus also offers facilities for marine and Earth sciences. This paper describes the design, the construction and the installation of the telescope in the deep sea, offshore from Toulon in France. An illustration of the detector performance is given
Identidades sociais e criação cultural no mundo contemporâneo
Get PDFA partir de uma proposta temática voltada para o estudo dos processos de construção das identidades sociais, o quarto número de ANTARES (Letras e Humanidades) investe no diálogo interdisciplinar, valorizando a criação de ferramentas teóricas capazes de agregar aos estudos da cultura perspectivas de análise e abordagens metodológicas renovadas
Long-term monitoring of the ANTARES optical module efficiencies using K decays in sea water
No full textCherenkov light induced by radioactive decay products is one of the major sources of background light for deep-sea neutrino telescopes such as ANTARES. These decays are at the same time a powerful calibration source. Using data collected by the ANTARES neutrino telescope from mid 2008 to 2017, the time evolution of the photon detection efficiency of optical modules is studied. A modest loss of only 20% in 9 years is observed. The relative time calibration between adjacent modules is derived as well
Search for neutrinos from Gamma-Ray Bursts with ANTARES
No full textA method to search for neutrino induced showers from gamma‐ray bursts in the ANTARES detector is presented. ANTARES consists of a three‐dimensional array of photosensitive devices that measure Cherenkov light induced by charged particles produced by high energy neutrinos interacting in the detector vicinity. The shower channel is complementary to the more commonly used upgoing muon channel. The corresponding detection volume is smaller, but has the advantage of being sensitive to neutrinos of any flavou
Measuring the atmospheric neutrino oscillation parameters and constraining the 3+1 neutrino model with ten years of ANTARES data
No full textThe ANTARES neutrino telescope has an energy threshold of a few tens of GeV. This allows to study the phenomenon of atmospheric muon neutrino disappearance due to neutrino oscillations. In a similar way, constraints on the 3+1 neutrino model, which foresees the existence of one sterile neutrino, can be inferred. Using data collected by the ANTARES neutrino telescope from 2007 to 2016, a new measurement of m 2 and (23) has been performed which is consistent with world best-fit values and constraints on the 3+1 neutrino model have been derived
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