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Gravitational Waves And Short Gamma Ray Bursts
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Book Synopsis Gravitational Waves and Short Gamma Ray Bursts by : Valeriu Predoi
Download or read book Gravitational Waves and Short Gamma Ray Bursts written by Valeriu Predoi and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Short hard gamma-ray bursts (GRB) are believed to be produced by compact binary coalescences (CBC) { either double neutron stars or neutron star{black hole binaries. The same source is expected to emit strong gravitational radiation, detectable with existing and planned gravitational wave observatories. The focus of this work is to describe a series of searches for gravitational waves (GW) from compact binary coalescence (CBC) events triggered by short gamma-ray burst detections. Specifically, we will present the motivation, frameworks, implementations and results of searches for GW associated with short gamma-ray bursts detected by Swift, Fermi{GBM and the InterPlanetary Network (IPN) gamma-ray detectors. We will begin by presenting the main concepts that lay the foundation of gravitational waves emission, as they are formulated in the theory of General Relativity; we will also brie y describe the operational principles of GW detectors, together with explaining the main challenges that the GW detection process is faced with. Further, we will motivate the use of observations in the electromagnetic (EM) band as triggers for GW searches, with an emphasis on possible EM signals from CBC events. We will briefly present the data analysis techniques including concepts as matched{filtering through a collection of theoretical GW waveforms, signal{to{ noise ratio, coincident and coherent analysis approaches, signal{based veto tests and detection candidates' ranking. We will use two different GW{GRB search examples to illustrate the use of the existing coincident and coherent analysis methods. We will also present a series of techniques meant to improve the sensitivity of existing GW triggered searches. These include shifting background data in time in order to obtain extended coincident data and setting a prior on the GRB inclination angle, in accordance with astrophysical observations, in order to restrict the searched parameter space. We will describe the GW data analysis and present results from a GW search around 12 short gamma-ray bursts detected by the InterPlanetary Network (IPN) between 2006 and 2007. The IPN{detected bursts usually have extended localization error boxes and a search for GW was performed at different sky locations across these error regions. Since no GW detection was made, we set upper limits on the distances to the GRB progenitors; we briefly discuss the implications that two IPN GRBs error regions overlap two nearby galaxies.
Book Synopsis Gravitational Waves: A New Window to the Universe by : Rosalba Perna
Download or read book Gravitational Waves: A New Window to the Universe written by Rosalba Perna and published by Frontiers Media SA. This book was released on 2021-07-02 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Physics of Gamma-Ray Bursts by : Bing Zhang
Download or read book The Physics of Gamma-Ray Bursts written by Bing Zhang and published by Cambridge University Press. This book was released on 2019 with total page 617 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete text on the physics of gamma-ray bursts, the most brilliant explosions since the Big Bang.
Book Synopsis What Are Gamma-Ray Bursts? by : Joshua S. Bloom
Download or read book What Are Gamma-Ray Bursts? written by Joshua S. Bloom and published by Princeton University Press. This book was released on 2011-01-10 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: A brief, cutting-edge introduction to the brightest cosmic phenomena known to science Gamma-ray bursts are the brightest—and, until recently, among the least understood—cosmic events in the universe. Discovered by chance during the cold war, these evanescent high-energy explosions confounded astronomers for decades. But a rapid series of startling breakthroughs beginning in 1997 revealed that the majority of gamma-ray bursts are caused by the explosions of young and massive stars in the vast star-forming cauldrons of distant galaxies. New findings also point to very different origins for some events, serving to complicate but enrich our understanding of the exotic and violent universe. What Are Gamma-Ray Bursts? is a succinct introduction to this fast-growing subject, written by an astrophysicist who is at the forefront of today's research into these incredible cosmic phenomena. Joshua Bloom gives readers a concise and accessible overview of gamma-ray bursts and the theoretical framework that physicists have developed to make sense of complex observations across the electromagnetic spectrum. He traces the history of remarkable discoveries that led to our current understanding of gamma-ray bursts, and reveals the decisive role these phenomena could play in the grand pursuits of twenty-first century astrophysics, from studying gravity waves and unveiling the growth of stars and galaxies after the big bang to surmising the ultimate fate of the universe itself. What Are Gamma-Ray Bursts? is an essential primer to this exciting frontier of scientific inquiry, and a must-read for anyone seeking to keep pace with cutting-edge developments in physics today.
Book Synopsis Improving the Detectability of Gravitational Wave Counterparts of Short-hard Gamma Ray Bursts by : Shaon Ghosh
Download or read book Improving the Detectability of Gravitational Wave Counterparts of Short-hard Gamma Ray Bursts written by Shaon Ghosh and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With multiple observatories and missions being planned for detecting orphaned afterglows associated with gamma-ray bursts (GRBs) we emphasize the importance of developing data analysis strategies for searching their possible counterpart signals in the data of gravitational wave detectors in the advanced detector era. This is especially attractive since short hard gamma-ray bursts (SGRBs) may have compact binary coalescences involving neutron stars (CBCNS) as their progenitors, which emit gravitational waves. Joint electromagnetic and gravitational wave observations of these objects will enrich our understanding of their beaming, energetics, galactic environment, and shed light on a host of other outstanding questions related to them. We recognize some of the astrophysical factors that determine what fraction of these sources can generate orphaned afterglows. We developed a search pipeline by modifying the existing blind hierarchical coherent search pipeline, targeting their sky-position and time of occurrence known from EM observations to enable it to search for counterparts of SGRB and SGRB afterglows in gravitational wave detector data. The modifications allows it to analyze extended periods of time in the gravitational wave data in the past of the afterglow detection epoch, while targeting its known sky-position, to search for gravitational waves from the common progenitor. We assess the improvement in gravitational wave detectability to be had from utilizing the sky-position information. We also propose a method for mitigating the effects on the detection efficiency of targeted searches of gravitational wave signals from the putative CBCNS sources of afterglows and short gamma-ray bursts arising from the presence of errors in detector calibration or CBCNS waveform models used in the search.
Book Synopsis Physics of Gravitational Waves by : Arun Kenath
Download or read book Physics of Gravitational Waves written by Arun Kenath and published by Springer Nature. This book was released on 2023-05-01 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a concise introduction to the physics of gravitational waves. It is aimed at graduate-level students and PhD scholars. Ever since the discovery of gravitational waves in 2016, gravitational wave astronomy has been adding to our understanding of the universe. Gravitational waves have been detected in the past few years from several transient events such as merging stellar-mass black holes, binary neutron stars, etc. These waves have frequencies in a band ranging from a few hundred hertz to around a kilohertz to which LIGO type instruments are sensitive. LISA will be sensitive to much lower range of frequencies from SMBH mergers. Apart from these cataclysmic burst events, there are innumerable sources of radiation which are continuously emitting gravitational waves of all frequencies. These include a whole mass range of compact binary and isolated compact objects and close planetary stellar entities. This book discusses the gravitational wave background produced in typical frequency ranges from such sources emitting over a Hubble time and the fluctuations in the h values measured in the usual devices. Also discussed are the high-frequency thermal background gravitational radiation from hot stellar interiors and newly formed compact objects. The reader will also learn how gravitational waves provide a testing tool for various theories of gravity, i.e. general relativity and extended theories of gravity, and will be the definitive test for general relativity.
Book Synopsis A Search for Pulsed Gravitational Waves Associated with Gamma-ray Bursts Using LIGO by : Rauha John Rahkola
Download or read book A Search for Pulsed Gravitational Waves Associated with Gamma-ray Bursts Using LIGO written by Rauha John Rahkola and published by . This book was released on 2006 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Observations and Theory of Short GRBs at the Dawn of the Gravitational Wave Era by : Giulia Stratta
Download or read book Observations and Theory of Short GRBs at the Dawn of the Gravitational Wave Era written by Giulia Stratta and published by MDPI. This book was released on 2019-09-30 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book starts with a review of the established facts on the numerical simulations of binary neutron star mergers and simulations of short GRB jets that highlights the issues that need to be revised and further clarified, as the need to understand how the relativistic outflow was launched, what the initial structure of the outflow is, and how it evolved through its interaction with the binary ejecta. Constraints on a local population of faint short duration GRBs are then provided in light of the GW170817/GRB 170817A event at d~40 Mpc by considering statistical limits on a d < 200 Mpc population. Using past and current GRB detectors, results suggest that GRB 170817A-like events are likely to be rare in existing short GRB catalogues and, if binary neutron star merger rates are at the high end of current estimates, then at most a few percent will be accompanied by detectable gamma-ray flashes in the forthcoming LIGO/Virgo science runs. Indirect information on the nature of short GRBs can be obtained from their host galaxy. The host galaxies of most short GRBs are found to be star-forming, but an important fraction, ∼1/5, are elliptical with negligible star formation. Short bursts often occur at very large off-sets from their hosts, in regions where there is little or no underlying host light. These results provide evidence of progenitors associated with merger of compact object binaries with kick velocities of a few tens of km/s and merger times of ∼1 Gyr. The last two issues of the book tackle the physics of the short GRB radiative processes. Interestingly, it was already noted in the past that the prompt emission for short GRBs and the initial 2 s of long-duration GRBs show similarity in the low energy photon index. This result has been further confirmed using a larger sample of Fermi Gamma-ray burst monitor data. In particular, it has been found that for 25% of GRBs, the photon index is shallower than −2/3, challenging the standard synchrotron emission scenario. The extent up to which the reverse shock component is detectable for short GRBs in radio wavelengths is analyzed. Results show that early, radio bright reverse shock is expected in many cases, but more rapid follow-up observational campaigns are required in order to test these predictions.
Book Synopsis Gravitational Waves with Gamma-ray Bursts by : Andrew Robert Williamson
Download or read book Gravitational Waves with Gamma-ray Bursts written by Andrew Robert Williamson and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bayesian Inference and Maximum Entropy Methods in Science and Engineering by : Rainer Fischer
Download or read book Bayesian Inference and Maximum Entropy Methods in Science and Engineering written by Rainer Fischer and published by A I P Press. This book was released on 2004-11-19 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: All papers were peer reviewed. Bayesian Inference and Maximum Entropy Methods in Science and Engineering provide a framework for analyzing ill-conditioned data. Maximum Entropy is a theoretical method to draw conclusions when little information is available. Bayesian probability theory provides a formalism for scientific reasoning by analyzing noisy or imcomplete data using prior knowledge.
Book Synopsis Understanding Gravitational Waves by : C. R. Kitchin
Download or read book Understanding Gravitational Waves written by C. R. Kitchin and published by Springer Nature. This book was released on 2021-09-23 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: The birth of a completely new branch of observational astronomy is a rare and exciting occurrence. For a long time, our theories about gravitational waves—proposed by Albert Einstein and others more than a hundred years ago—could never be fully proven, since we lacked the proper technology to do it. That all changed when, on September 14, 2015, instruments at the LIGO Observatory detected gravitational waves for the first time. This book explores the nature of gravitational waves—what they are, where they come from, why they are so significant and why nobody could prove they existed before now. Written in plain language and interspersed with additional explanatory tutorials, it will appeal to lay readers, science enthusiasts, physical science students, amateur astronomers and to professional scientists and astronomers.
Book Synopsis Detecting Gravitational Waves for Multi-Messenger Astronomy by : Cody Messick
Download or read book Detecting Gravitational Waves for Multi-Messenger Astronomy written by Cody Messick and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Gravitational waves, ripples in space-time that cause the physical distance between points to change in time, were first predicted by Albert Einstein in the early twentieth century. One of the most promising sources of gravitational waves was thought to be the merger of binary neutron stars, which were also believed to generate extremely energetic bursts of light known as gamma-ray bursts and an optical transient known as a kilonova. Large interferometers capable of measuring distances of 10^18 m were built to detect gravitational waves. My dissertation research has been focused on detecting gravitational waves rapidly for the purpose of searching for electromagnetic or other signals from merging neutron star binaries. I contributed to the first-ever detection of gravitational waves in 2015, and every detection since. My work to rapidly identify new gravitational wave detections led to the first joint multi-messenger detection made in 30 years on August 17, 2017, when gravitational waves from a binary neutron star merger were observed in coincidence with a short gamma-ray burst, which led astronomers around the world to point their instruments at the region of the sky where the signal was estimated to have came from in time to observe counterparts across several electromagnetic bands. In this dissertation I will discuss each of these historical detections and the analysis I co-developed and helped perform.
Book Synopsis Three Hundred Years of Gravitation by : Stephen Hawking
Download or read book Three Hundred Years of Gravitation written by Stephen Hawking and published by Cambridge University Press. This book was released on 1987 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of reviews by prominent researchers in cosmology, relativity and particle physics commemorates the 300th anniversary of Newton's Philosophiae Naturalis Principia Mathematica.
Book Synopsis A Search for Gravitational Waves Associated with the Gamma Ray Burst GRB030329 Using the LIGO Detectors by :
Download or read book A Search for Gravitational Waves Associated with the Gamma Ray Burst GRB030329 Using the LIGO Detectors written by and published by . This book was released on 2005 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Searching for Gravitational Waves Associated with Gamma-ray Bursts Int 2009-2010 Ligo-virgo Data by : Michal Was
Download or read book Searching for Gravitational Waves Associated with Gamma-ray Bursts Int 2009-2010 Ligo-virgo Data written by Michal Was and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis we present the results of the search for gravitational wave bursts associated with gamma-ray bursts in the 2009-2010 data from the LIGOVirgo gravitational wave interferometer network. The study of gamma-ray bursts progenitors, both from the gamma-ray emission and the gravitational wave emission point of view, yields the characteristic of the sought signal: polarization, time delays, etc ... This knowledge allows the construction of a data analysis method which includes the astrophysical priors on joint gravitational wave and gamma-ray emission, and moreover which is robust to non-stationary transient noises, which are present in the data. The lack of detection in the analyzed data yields novel observational limits on the gamma-ray burst population.
Book Synopsis Improved Methods for the Detection of Gravitational Waves Associated with Gamma-ray Bursts by : Iain Dorrington
Download or read book Improved Methods for the Detection of Gravitational Waves Associated with Gamma-ray Bursts written by Iain Dorrington and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Black Holes to Big Bang by : Larry J Chamber
Download or read book Black Holes to Big Bang written by Larry J Chamber and published by Tredition Gmbh. This book was released on 2024-05-04 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The growing catalog of gravitational-wave signals from compact object mergers has allowed us to study the properties of black holes and neutron stars more precisely than ever before and has opened a new window through which to probe the earliest moments in our universe's history. Population-level measurements of the masses and spins of compact objects can reveal how these systems form and evolve. Multimessenger observations of compact object mergers can shed light on the properties of the electromagnetic counterparts of these systems, such as short gamma-ray bursts and kilonovae. Finally, observations of the stochastic gravitational-wave background can constrain early-universe physics inaccessible with other means.
