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Author : Stefan Geißelsöder
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (969 download)
Download or read book Model-independent Search for Neutrino Sources with the ANTARES Neutrino Telescope written by Stefan Geißelsöder and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Vladimir Kulikovskiy
Publisher : Springer
ISBN 13 : 3319204122
Total Pages : 130 pages
Book Rating : 4.3/5 (192 download)
Download or read book Neutrino Astrophysics with the ANTARES Telescope written by Vladimir Kulikovskiy and published by Springer. This book was released on 2015-06-22 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is devoted to ANTARES, the first underwater neutrino telescope in the Mediterranean sea. As the main scientific analysis, a search for high-energy neutrino emission from the region of the Fermi bubbles has been performed using data from the ANTARES detector. A method for the background estimation using off-zones has been developed specially for this measurement. A new likelihood for the limits calculation which treats both observations in the on-zone and in the off-zone in the similar way and also includes different systematic uncertainties has been constructed. The analysis of 2008–2011 ANTARES data yielded a 1.2 σ excess of events in the Fermi bubble regions, compatible with the no-signal hypothesis. For the optimistic case of no energy cutoff in the flux, the upper limit is within a factor of three of the prediction of the purely hadronic model based on the measured gamma-ray flux. The sensitivity improves as more data are accumulated (more than 65% gain in the sensitivity is expected once 2012–2016 data are added to the analysis).
Author : Rodrigo Gracia Ruiz
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (11 download)
Download or read book Search for Populations of Unresolved Sources of High Energy Neutrinos with the ANTARES Neutrino Telescope written by Rodrigo Gracia Ruiz and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Astroparticle physics is a branch of physics related to the study of the most violent astrophysical phenomena in the Universe such as Active Galactic Nuclei (AGN) or Gamma Ray Bursts (GRB), which emit different cosmic messengers such as neutrinos, gravitational waves, electromagnetic radiation and charged particles. A proper understanding of these objects involves then a multi-messenger approach, in which neutrinos play a fundamental role. Thanks to their physical properties, neutrinos allow us to explore the physical phenomena produced in the densest astrophysical environments and to observe the Universe at large distances. This thesis is divided into three main parts. The first part is composed by three chapters dedicated to the scientific context in which the rest of the thesis is developed. In the first chapter, the scientific motivations for the search of high energy cosmic neutrinos are described. In chapter 2, a description of the main properties of AGN are given. These sources have been chosen as "test" objects in the research of potential neutrino sources. Finally, the third chapter is dedicated to the detection principle and main results of the currently operating neutrino telescopes. The second part of the thesis is dedicated to the technical description of the ANTARES neutrino telescope, and composed of two chapters. Chapter 4 describes the ANTARES telescope, the data acquisition and the data selection. In the last part of this chapter, the work made to measure the efficiency loss of the photomultipliers (PMTs) by using the baseline rates is described. Chapter 5 is dedicated to the Monte Carlo simulations. The different simulation packages used by the ANTARES collaboration are presented, and the different simulated processes are described. A contribution to the official package for the generation of neutrino interactions, relative to the implementation of the propagation and decay of the tau leptons, is described. The third part is dedicated to the search of potential cosmic signals in the events recorded by ANTARES. It comprises four chapters. Chapter 6 is a description of the signal search method, chapter 7 presents the principles of an analysis based on a 2 point correlation function that will be applied in chapter 9 with the purpose of searching for an excess of cosmic neutrinos characterized by an expected spatial distribution which is different from that of atmospheric neutrinos. This method is well suited for the detection of the collective effect produced by populations of weak point-like sources. Chapter 8 describes the simulation of the neutrino flux emitted by AGN. By using the luminosity function for different AGN classes obtained from X-ray observations, and the ANTARES acceptance, neutrinos coming from AGN populations are simulated as a function of two parameters which are related to the number of sources in the population, and to their luminosities. The analysis of these populations with the 2 point correlation function is detailed in chapter 9.
Author : Javier Barrios Martí
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Download or read book Search for Cosmic Sources in Neutrino Telescopes and the Calibration in the ANTARES Neutrino Telescope written by Javier Barrios Martí and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Thomas K. Gaisser
Publisher : World Scientific Publishing Company
ISBN 13 : 9789814759403
Total Pages : 0 pages
Book Rating : 4.7/5 (594 download)
Download or read book Neutrino Astronomy written by Thomas K. Gaisser and published by World Scientific Publishing Company. This book was released on 2016-11-30 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gamma ray bursts as neutrino sources / Peter Mészáros -- Active galactic nuclei as high-energy neutrino sources / Kohta Murase -- The origin of IceCube's neutrinos: cosmic ray accelerators embedded in star forming calorimeters / E. Waxman -- Galactic neutrino sources / Markus Ahlers -- Observations of diffuse fluxes of cosmic neutrinos / Christopher H. Wiebusch -- IceCube and astrophysical neutrinos: the search for sources / Chad Finley -- Recent results from the ANTARES neutrino telescope / Paschal Coyle and Clancy A. James -- The baikal neutrino project / V.M. Aynutdinov and Zh. A.M. Dzhilkibaev -- The dawn of multi-messenger astronomy / Marcos Santander -- Neutrinos from core-collapse supernovae / Marek Kowalski -- The quest for dark matter with neutrino telescopes / Carlos Pérez de los Heros -- KM3NeT: astroparticle and oscillations research with cosmics in the abyss / M. de Jong -- A next generation IceCube - the IceCube-Gen2 facility for high energy neutrino astronomy / Erik Blaufuss and Albrecht Karle -- Neutrino physics with very large volume neutrino telescopes / Tyce DeYoung and Antoine Kouchner -- Radio detection of high-energy neutrinos / Amy Connolly and Abigail Vieregg
Author : Salvatore Galata
Publisher :
ISBN 13 :
Total Pages : 131 pages
Book Rating : 4.:/5 (868 download)
Download or read book A Time-dependent Search for Neutrino Emission from Microquasars with the ANTARES Telescope written by Salvatore Galata and published by . This book was released on 2012 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ANTARES collaboration has successfully built, deployed and is currently operating an underwater Cherenkov detector dedicated to high energy neutrino astronomy. The primary aim of the experiment is to detect cosmic sources of neutrinos in order to reveal the production sites of cosmic rays. Among the sources likely to be significant sources of neutrinos are those accelerating relativistic jets, like gamma ray bursts, active galactic nuclei and microquasars. Microquasars are binary systems formed by a compact object accreting mass from a companion star. The mass transfer causes the emission of X-rays, whereas the onset of magnetic forces in the accreting plasma can cause the acceleration of relativistic jets, which are observed by radio telescopes via their non-thermal synchrotron emission. In some systems, a correlation between X-ray and radio light curves indicates an interplay between accretion and ejection respectively. Some microquasars are also high energy and very high energy gamma ray emitters. In this thesis, a time dependent search for neutrino emission from microquasars was performed with a multi-messenger approach (photon/neutrino). The data from the X-ray monitors RXTE/ASM and SWIFT/BAT, and the gamma-ray telescope FERMI/LAT were used to select transient events in which the source was supposed to accelerate relativistic jets. The restriction of the analysis to the ejection periods allows a drastic reduction of atmospheric muon and neutrino background, and thus to increase the chances of a discovery. The search was performed with the ANTARES data taken between 2007 and 2010.
Author : Imen Al Samarai
Publisher :
ISBN 13 :
Total Pages : 195 pages
Book Rating : 4.:/5 (867 download)
Download or read book Search for Neutrinos from Transient Sources with the ANTARES Neutrino Telescope and Optical Follow-up Observations written by Imen Al Samarai and published by . This book was released on 2011 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: Astroparticle experiments are being developed with the aim of resolving the mystery of cosmic rays. Questions like from where cosmic rays originate or how do they get accelerated up to ultra high energies are still unresolved. Cherenkov telescopes like ANTARES detect the Cherenkov light emitted by muons propagating in the sea water. Muons are produced by the interaction of cosmic neutrinos (signal) or atmospheric neutrinos (noise) with the Earth nuclei.In order to offer the best detection conditions of Cherenkov light, and subsequently ensure a good reconstruction quality of the muons trajectory, the light sensors i.e the photomultipliers must satisfy various conditions.The first part of this thesis focuses on the development of photomultipliers using crystals as a preamplifier of the light signal. The advantage of such a method is the possibility to separate individual photo-electrons and to enhance the temporal resolution by applying a high electric field.The design and conception as well as the possibility to produce such devices at large industrial scales is for the first time developed in this thesis.The second part of the thesis is inspired from the new multi-messenger approach in ANTARES. An optical follow-up with six telescopes spread over the two hemispheres is triggered by the detection of a high energy neutrino or a set of neutrinos coincident in time and direction. Such a system enhances the sensitivity to transient sources such as Gamma Rays Bursts (GRB) or Core Collapse Supernovae. The neutrino alert system is now fully operational. The system offers good performances; the optical follow-up starts within one minute from the neutrino detection and the median angular accuracy of the reconstructed neutrinos is 0.4$^circ$.Upon the reception of an alert, the telescopes point at the neutrino direction and start the acquisition of image series almost each night of the month following the neutrino alert. Image analysis tools have been implemented to search for optical transients; First results on the search of GRB optical counterparts correlated with a neutrino signal are presented.
Author : Mukharbek Organokov
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (124 download)
Download or read book ANTARES Search for High-energy Neutrinos from TeV-emitting Blazars, Markarian 421 and 501, in Coïncidence with HAWC Gamma-ray Tiares written by Mukharbek Organokov and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutrinos are unique messengers for detecting violent phenomena in the Universe. Potential sources of cosmic neutrinos are, for example, Active Galactic Nuclei (AGNs) or Gamma-Ray Bursts (GRBs). In the case of hadronic cosmic rays acceleration, the production of neutrinos is possibly accompanied by high-energy gamma-ray emissions. The search for coincidences between high-energy neutrinos detected by the ANTARES neutrino telescope and gamma-rays detected by the HAWC gamma-ray observatory is presented. Searching in a particular time window significantly reduces the background noise in the neutrino data and thus increases the discovery potential. In this thesis, the results of a search for neutrinos detected in correlation with a gamma-ray signal from two particular AGNs, Markarian 421 and Markarian 501, are presented. As the blazars closest to Earth, they are excellent sources for testing the blazar-neutrino connection scenario, especially during the increase of their activities (flares) in which the search for neutrinos may have a higher detection probability.
Author : Timothée Grégoire
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (112 download)
Download or read book Search for High Energy Neutrinos from the Galactic Plane with the ANTARES Neutrino Telescope written by Timothée Grégoire and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gordon Max Alphonsius Lim
Publisher :
ISBN 13 : 9789090261621
Total Pages : 195 pages
Book Rating : 4.2/5 (616 download)
Download or read book Searching for Dark Matter with the Antares Neutrino Telescope written by Gordon Max Alphonsius Lim and published by . This book was released on 2011 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Universitat de València. Facultat de Física
Publisher :
ISBN 13 :
Total Pages : 223 pages
Book Rating : 4.:/5 (92 download)
Download or read book Analysis of the Optical Beacon System and Search for Point-like Sources in the ANTARES Neutrino Telescope written by Universitat de València. Facultat de Física and published by . This book was released on 2007 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael F. L'Annunziata
Publisher : Elsevier
ISBN 13 : 0323984479
Total Pages : 1148 pages
Book Rating : 4.3/5 (239 download)
Download or read book Radioactivity written by Michael F. L'Annunziata and published by Elsevier. This book was released on 2022-10-02 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radioactivity: History, Science, Vital Uses and Ominous Peril, Third Edition provides an introduction to radioactivity, the building blocks of matter, the fundamental forces in nature, and the role of quarks and force carrier particles. This new edition adds material on the dichotomy between the peaceful applications of radioactivity and the threat to the continued existence of human life from the potential use of more powerful and sophisticated nuclear weapons. The book includes a current review of studies on the probability of nuclear war and treaties, nonproliferation and disarmament, along with historical insights into the achievements of over 100 pioneers and Nobel Laureates. Through multiple worked examples, the book answers many questions for the student, teacher and practitioner as to the origins, properties and practical applications of radioactivity in fields such as medicine, biological and environmental research, industry, safe nuclear power free of greenhouse gases and nuclear fusion. Ratings and Reviews of Previous Editions: CHOICE Magazine, July 2008: "This work provides an overview of the many interesting aspects of the science of radioactive decays, including in-depth chapters that offer reminiscences on the history and important personalities of the field...This book can be useful as supplemental reading or as a reference when developing course material for nuclear physics, nuclear engineering, or health physics lectures. Special attention has been given to a chapter on the role radioactivity plays in everyday life applications...Generally the book is well produced and will be a valuable resource...Many lectures can be lightened up by including material from this work. Summing up: RECOMMENDED. Upper division undergraduates through professionals; technical program students." U. Greife, Colorado School of Mines, USA "I found the biographical accounts of the various stalwarts of Physics inspirational. Most of them, if not all, had to overcome economic hardships or p[ersonal tragedies or had to do their groundbreaking work in the face of tyranny and war. The biographies also highlighted the high standards of moral convictions that the scientists had as they realized the grave implications of some of their work and the potential threats to humanity. This ought to inspire and motivate young men and women aspiring to be physicists. Even people who have been in the field for a while should find your book re-energizing. It certainly had that effect on me." -- Dr. Ramkumar Venkataraman, Canberra Industries, Inc., Meriden, CT, USA Winner of an Honorable Mention in the 2017 PROSE Awards in the category of Chemistry and Physics (https://proseawards.com/winners/2017-award-winners/ ) Includes new content that explains the vital benefits that nuclear technology provides and the need to be aware and involved in worldwide efforts toward the reduction of nuclear weapon stockpiles and the elimination of the threat of nuclear weapons Provides context and insights on key research over the past three centuries, placing radioactivity in real-world contexts Supports learning via multiple solved problems that answer practical questions concerning nuclear decay, nuclear radiation and the interaction of nuclear radiation with matter
Download or read book Light at the End of the Shower written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Devyn Rysewyk Cantu
Publisher :
ISBN 13 :
Total Pages : 190 pages
Book Rating : 4.7/5 (599 download)
Download or read book Search for Extended Galactic Sources of Astrophysical Neutrinos with the Icecube Neutrino Observatory written by Devyn Rysewyk Cantu and published by . This book was released on 2021 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The IceCube Neutrino Observatory0́4a cubic-kilometer of instrumented ice at the geographic South Pole0́4has been observing a high-energy astrophysical neutrino flux since 2010. However, a steady source of these neutrinos is yet to be identified. Possible candidates contributing to the high-energy neutrino flux include extended sources (spanning a few degrees) originating from within the Milky Way. Such sources have been discovered in the very-high-energy gamma-ray sky along the Galactic plane with experiments such as HAWC and H.E.S.S. If the emission from these extended sources is of a hadronic origin, an associated flux of neutrinos from the decay of pions is also expected to be observed. Therefore, an observation of neutrino emission from these extended gamma-ray sources would provide direct insight into cosmic-ray acceleration in the galaxy. Two approaches to performing dedicated searches for extended sources along the Galactic plane with nine years of IceCube data will be discussed. With these two approaches, no significant sources were found and the results are consistent with background.While IceCube has revealed the existence of sources of high-energy astrophysical neutrinos, the identification of the sources is challenging because astrophysical neutrinos are difficult to separate from the background of atmospheric neutrinos produced in cosmic-ray-induced particle cascades in the atmosphere. The efficient detection of air showers in coincidence with detected neutrinos can greatly reduce those backgrounds and increase the sensitivity of neutrino telescopes. Imaging Air Cherenkov Telescopes (IACTs) are sensitive to gamma-ray-induced (and cosmic-ray-induced) air showers in the 50 GeV to 50 TeV range, and can therefore be used as background-identifiers for neutrino observatories. The feasibility of an array of small scale, wide field-of-view, cost-effective IACTs as an air shower veto for neutrino astronomy will be discussed. A surface array of 250 to 750 telescopes would significantly improve the performance of a cubic kilometer-scale detector like IceCube, at a cost of a few percent of the original investment. The number of telescopes in the array can be optimized based on astronomical and geometrical considerations.
Author : Alexander Pizzuto
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)
Download or read book Hunting for Cosmic Neutrino Sources from Giga- to Exa-electronvolt with IceCube written by Alexander Pizzuto and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ever since the first observation of cosmic rays over a century ago, the origins of these high-energy particles have remained a mystery. Identifying and understanding the sources of these cosmic rays could provide invaluable insight into not only astrophysics but also fundamental particle physics. The IceCube Neutrino Observatory, a cubic-kilometer neutrino telescope, has made remarkable progress on this front -- first with the detection of a diffuse astrophysical neutrino flux in 2013, and later with the identification of a flaring blazar as a promising neutrino source. However, the sources of the vast majority of the diffuse neutrino flux remain unidentified. The goal of this thesis is to develop tools to identify astrophysical neutrino sources with current neutrino observatories. We show how analyzing neutrino data with new techniques could reveal an immense deal about the nature of the universe's most energetic particle accelerators. First, we describe a pipeline that uses realtime data to search for neutrino emission from astrophysical transients. Next, we look for neutrino emission in the direction of IceCube alert events to constrain populations of neutrino sources. We then present the first ever search for sub-TeV neutrino emission from novae. Lastly, we search for neutrino emission coincident with ANITA neutrino candidates, and show how IceCube can search for neutrinos with energies traditionally reserved for radio neutrino detectors. All of the analyses resulted in non-detections, and we present upper-limits for each. Our results include, but are not limited to, (1) the first constraints on neutrino emission from novae, (2) the first constraints on neutrino emission from fast radio bursts at a level more constraining than the diffuse astrophysical neutrino flux, (3) the first constraints on populations of day-scale transient neutrino sources, and (4) the first joint interpretation of very-high-energy optical Cherenkov neutrino data and ultra-high-energy radio neutrino data in the context of astrophysical neutrino sources. Although all of these analyses resulted in non-detections, these tools have already provided interesting constraints on the sources of high-energy neutrinos, and we are hopeful that the tools presented here will assist with the identification of cosmic neutrino sources in the years to come.
Author : Marta Colomer Molla
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Download or read book Search for Transient Sources with the Antares and KM3NeT Neutrino Telescopes in the Multi-Messenger Astronomy Era written by Marta Colomer Molla and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Matteo Sanguineti
Publisher :
ISBN 13 :
Total Pages : 236 pages
Book Rating : 4.:/5 (966 download)
Download or read book Search for GRB Neutrino Emission According to the Photospheric Model with the ANTARES Telescope written by Matteo Sanguineti and published by . This book was released on 2016 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: The possible evidence of neutrino emission in correspondence of a Gamma ray burst (GRB) would gave important informations on the production mechanisms and on the most promising emission models. Among these, one of the most recent and widely discussed is the so-called photospheric model. It can explain some measured features of the gamma ray bursts that are not described by the previous models. The photospheric model predicts a sensible neutrino emission in an energetic range a couple of order of magnitude lower with respect to the classical models. In this thesis a completely innovative method of research has been proposed and dedicated tools have been developed to enhance the ANTARES detector sensitivity in the energetic range predicted by the photospheric model. To this extent, for the first time, the unflitered data registered in ANTARES in correspondence of a gamma ray burst has been used. In addition a dedicated directional trigger and a special reconstruction algorithm optimized at low energies were found very effective. As a result, this analysis has enhanced the sensitivity of the dectector up to a factor 2 for neutino energies between 100 GeV and 1 TeV. This analysis was applied to the search of a possible neutrino emission in correspondance of the GRB130427A and GRB130505A events. No evidence for neutrino emission was found. However an upper limit on the neutrino flux from these GRBs in the energetic range which fats the predictions of the most recent emission models was determined.
