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The Search For Gravitational Wave Bursts In Data From The Second Ligo Science Run
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Book Synopsis The Search for Gravitational Wave Bursts in Data from the Second LIGO Science Run by : Shourov Keith Chatterji
Download or read book The Search for Gravitational Wave Bursts in Data from the Second LIGO Science Run written by Shourov Keith Chatterji and published by . This book was released on 2005 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: (cont.) upper bounds are reported for the rate of gravitational-wave bursts as a function of signal strength for isotropic and galactic populations of sources with both abstract and astrophysically motivated waveform. The results indicate a maximum of 0.09 events per day at the 90% confidence level for bursts with characteristic strain amplitude in excess of 10-20 to 10-19 strain Hz-l/2 depending on waveform. A comparison with previous searches demonstrates that this search is one of the most sensitive to date for gravitational-wave bursts of unknown waveform, and is inconsistent with recent indications for an statistical excess of events by the ROG collaboration at above the 99% confidence level.
Book Synopsis First Upper Limits from LIGO on Gravitational Wave Bursts by :
Download or read book First Upper Limits from LIGO on Gravitational Wave Bursts written by and published by . This book was released on 2004 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a search for gravitational wave bursts using data from the first science run of the LIGO detectors. Our search focuses on bursts with durations ranging from 4 ms to 100 ms, and with significant power in the LIGO sensitivity band of 150 to 3000 Hz. We bound the rate for such detected bursts at less than 1.6 events per day at 90% confidence level. This result is interpreted in terms of the detection efficiency for ad hoc waveforms (Gaussians and sine-Gaussians) as a function of their root-sum-square strain h{sub rss}; typical sensitivities lie in the range h{sub rss} (almost equal to) 10−19 - 10−17 strain/(square root)Hz, depending on waveform. We discuss improvements in the search method that will be applied to future science data from LIGO and other gravitational wave detectors.
Book Synopsis A High-frequency Gravitational-wave Burst Search with LIGO's Hanford Site by : Jacqueline Rose Villadsen
Download or read book A High-frequency Gravitational-wave Burst Search with LIGO's Hanford Site written by Jacqueline Rose Villadsen and published by . This book was released on 2009 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) The background data are the data from the two Hanford detectors during times when the Livingston detector was in science mode. These background data are used to set requirements for identifying a gravitational-wave candidate in the foreground data, which are the data from the two Hanford detectors when the Livingston detector was not in science mode. The analysis identifies no gravitational-wave candidates. However, the analysis does set an upper limit on the rate of high-frequency gravitational-wave bursts as a function of signal strength and frequency. The upper limits converge to an upper limit of 0.018 events per day, or 6.5 events per year, at the 90% confidence level, for bursts at or above a characteristic strain amplitude of 10-19 strain/JH. This work does not reflect the scientific opinion of the LIGO Scientific Collaboration and its results have not been reviewed by the collaboration.
Book Synopsis Gravitational Waves by : Michele Maggiore
Download or read book Gravitational Waves written by Michele Maggiore and published by Oxford University Press. This book was released on 2008 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two volumes of 'Gravitational Waves' provide a comprehensive and detailed account of the physics of gravitational waves. Volume 2 discusses what can be learned from gravitational waves in astrophysics and in cosmology, by systematising a large body of theoretical developments that have taken place over the last decades.
Book Synopsis Fundamentals Of Interferometric Gravitational Wave Detectors (Second Edition) by : Peter R Saulson
Download or read book Fundamentals Of Interferometric Gravitational Wave Detectors (Second Edition) written by Peter R Saulson and published by World Scientific. This book was released on 2017-02-16 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'The content of the Saulson’s book remains valid and offers a versatile introduction to gravitational wave astronomy. The book is appropriate for undergraduate students and can be read by graduate students and researchers who want to be involved in either the theoretical or the experimental traits of the study of gravitational waves.'Contemporary PhysicsLIGO's recent discovery of gravitational waves was headline news around the world. Many people will want to understand more about what a gravitational wave is, how LIGO works, and how LIGO functions as a detector of gravitational waves.This book aims to communicate the basic logic of interferometric gravitational wave detectors to students who are new to the field. It assumes that the reader has a basic knowledge of physics, but no special familiarity with gravitational waves, with general relativity, or with the special techniques of experimental physics. All of the necessary ideas are developed in the book.The first edition was published in 1994. Since the book is aimed at explaining the physical ideas behind the design of LIGO, it stands the test of time. For the second edition, an Epilogue has been added; it brings the treatment of technical details up to date, and provides references that would allow a student to become proficient with today's designs.
Book Synopsis Globular Cluster Binaries and Gravitational Wave Parameter Estimation by : Carl-Johan Haster
Download or read book Globular Cluster Binaries and Gravitational Wave Parameter Estimation written by Carl-Johan Haster and published by Springer. This book was released on 2017-07-27 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents valuable contributions to several aspects of the rapidly growing field of gravitational wave astrophysics. The potential sources of gravitational waves in globular clusters are analyzed using sophisticated dynamics simulations involving intermediate mass black holes and including, for the first time, high-order post-Newtonian corrections to the equations of motion. The thesis further demonstrates our ability to accurately measure the parameters of the sources involved in intermediate-mass-ratio inspirals of stellar-mass compact objects into hundred-solar-mass black holes. Lastly, it proposes new techniques for the computationally efficient inference on gravitational waves. On 14 September 2015, the LIGO observatory reported the first direct detection of gravitational waves from the merger of a pair of black holes. For a brief fraction of a second, the power emitted by this merger exceeded the combined output of all stars in the visible universe. This has since been followed by another confirmed detection and a third candidate binary black hole merger. These detections heralded the birth of an exciting new field: gravitational-wave astrophysics.
Book Synopsis The Detection of Gravitational Waves by : David G. Blair
Download or read book The Detection of Gravitational Waves written by David G. Blair and published by Cambridge University Press. This book was released on 2005-10-13 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the concepts of gravitational waves within the context of general relativity. The sources of gravitational radiation for which there is direct observational evidence and those of a more speculative nature are described. He then gives a general introduction to the methods of detection. In the subsequent chapters he has drawn together the leading scientists in the field to give a comprehensive practical and theoretical account of the physics and technology of gravitational wave detection.
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 Searches for Gravitational Waves from Binary Black Hole Coalescences with Ground-based Laser Interferometer Across a Wide Parameter Space by : Satyanarayan Ray Pitambar Mohapatra
Download or read book Searches for Gravitational Waves from Binary Black Hole Coalescences with Ground-based Laser Interferometer Across a Wide Parameter Space written by Satyanarayan Ray Pitambar Mohapatra and published by . This book was released on 2012 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an exciting time for Gravitational Wave (GW) theory and observations. From a theoretical standpoint, the grand-challenge problem of the full evolution of a Binary Black Hole (BBH) system has been solved numerically, and a variety of source simulations are made available steadfastly. On the observational side, the first generation of state-of-the-art GW detectors, LIGO and Virgo, have achieved their design goal, collected data and provided astrophysically meaningful limits. The second generation of detectors are expected to start running by 2015. Inspired by this zeitgeist, this thesis focuses on the detection of potential GW signatures from the coalescence of BBH in ground-based laser interferometers. The LIGO Scientific Collaboration has implemented different algorithms to search for transient GW signatures, targeting different portions of the BBH coalescence waveform. This thesis has used the existing algorithms to study the detection potential of GW from colliding BBH in LIGO in a wide range of source parameters, such as mass and spin of the black holes, using a sample of data from the last two months of the S5 LIGO science run (14 Aug 2007 to 30 Sept 2007). This thesis also uses numerical relativity waveforms made available via the Numerical INJection Analysis project (NINJA). Methods such as the Chirplet based analysis and the use of multivariate classifiers to optimize burst search algorithms have been introduced in this thesis. These performance studies over a wide parameter space were designed to optimize the discovery potential of ground-based GW detectors and defining strategies for the search of BBH signatures in advanced LIGO data, as a step towards the realization of GW astronomy.
Book Synopsis Gravitational-Wave Astronomy by : Nils Andersson
Download or read book Gravitational-Wave Astronomy written by Nils Andersson and published by Oxford Graduate Texts. This book was released on 2019-11-28 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an introduction to gravitational waves and related astrophysics. It provides a bridge across the range of astronomy, physics and cosmology that comes into play when trying to understand the gravitational-wave sky. Starting with Einstein's theory of gravity, chapters develop the key ideas step by step, leading up to the technology that finally caught these faint whispers from the distant universe. The second part of the book makes a direct connection with current research, introducing the relevant language and making the involved concepts less "mysterious". The book is intended to work as a platform, low enough that anyone with an elementary understanding of gravitational waves can scramble onto it, but at the same time high enough to connect readers with active research - and the many exciting discoveries that are happening right now. The first part of the book introduces the key ideas, following a general overview chapter and including a brief reminder of Einstein's theory. This part can be taught as a self-contained one semester course. The second part of the book is written to work as a collection of "set pieces" with core material that can be adapted to specific lectures and additional material that provide context and depth. A range of readers may find this book useful, including graduate students, astronomers looking for basic understanding of the gravitational-wave window to the universe, researchers analysing data from gravitational-wave detectors, and nuclear and particle physicists.
Book Synopsis Searching for Stochastic Gravitational Waves Using Co-located Interferometric Detectors by : Nickolas Fotopoulos
Download or read book Searching for Stochastic Gravitational Waves Using Co-located Interferometric Detectors written by Nickolas Fotopoulos and published by . This book was released on 2006 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite their intrinsic advantages due to co-location, the two LIGO (Laser Interferometer Gravitational Wave Observatory) Hanford interferometers have not been used in the search for the stochastic gravitational wave background due to their coupling to a shared environment, which may be comparable to or exceed any gravitational signal. In this thesis, using data from LIGO's fourth science run, we demonstrate a technique to relate the H1-H2 coherence to coupling with physical environmental channels. We show that the correspondence is tight enough to correctly identify regions of high and low coupling and the nature of the coupling in the data set. A simple thresholding provides frequency vetoes, which we can use to derive a significantly cleaner coherence spectrum. Next, using this frequency veto technique and data from the first epoch of LIGO's fifth, currently running science run, we design, implement, and perform a search for astrophysical populations of gravitational wave emitters, which emit predominantly in the kilohertz region of the spectrum, a region totally inaccessible to detectors separated by thousands of kilometers. As well as providing us with a proof-of-concept, the results provide an advanced look at the physical results to come from H1-H2 by the end of S5.
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 Open Issues in the Search for Gravitational Wave Transients by : Lindy L. Blackburn
Download or read book Open Issues in the Search for Gravitational Wave Transients written by Lindy L. Blackburn and published by . This book was released on 2010 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: The LIGO-Virgo network of kilometer-scale laser interferometric gravitational-wave detectors reached a major milestone with the successful operation of LIGO's fifth (S5) and Virgo's first (VSR1) science runs during 2005-2007. This thesis presents several issues related to gravitational-wave transient detection from the perspective of the joint all-sky, un-triggered burst search over S5/VSR1 data. Existing searches for gravitational-wave bursts must deal with the presence of non-Gaussian noise transients which populate the data over the majority of sensitive signal space. These events may be confused with true signals, and are the current limiting factor in search sensitivity and detection confidence for any real event. The first part of this thesis focuses on the development of tools to identify, monitor and characterize these instrumental disturbances in LIGO and Virgo data. An automated procedure is developed and applied to the S5/VSR1 search in order to safely remove noise transients from the analysis without sacrificing sensitivity by making use of the wealth of auxiliary information recorded by the detectors. The second part of this thesis focuses on the interpretation of outlier events in the context of a non-Gaussian, non-stationary background. An extensive follow-up procedure for candidate gravitational-wave events is developed and applied to a single burst outlier from the S5/VSR1 search, later revealed to be a blind simulation injected into the instruments. While the follow-up procedure correctly finds no reason to reject the candidate as a possible gravitational wave, it highlights the difficulty in making a confident detection for signals with similar waveform morphology to common instrumental disturbances. The follow-up also deals with the problem of objectively defining the significance of a single outlier event in the context of many semi-disjoint individual searches. To address this, a likelihood-ratio based unified ranking is developed and tested against the original procedures of the S5/VSR1 burst search. The new ranking shows a factor of four improvement in the statistical significance of the outlier event, and a 12% reduction using fixed thresholds and 38% reduction using a loudest event statistic for a rate upper limit on a mock signal population.
Book Synopsis Stellar Collapse by : Chris L. Fryer
Download or read book Stellar Collapse written by Chris L. Fryer and published by Springer Science & Business Media. This book was released on 2004-04-30 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supernovae, hypernovae and gamma-ray bursts are among the most energetic explosions in the universe. The light from these outbursts is, for a brief time, comparable to billions of stars and can outshine the host galaxy within which the explosions reside. Most of the heavy elements in the universe are formed within these energetic explosions. Surprisingly enough, the collapse of massive stars is the primary source of not just one, but all three of these explosions. As all of these explosions arise from stellar collapse, to understand one requires an understanding of the others. Stellar Collapse marks the first book to combine discussions of all three phenomena, focusing on the similarities and differences between them. Designed for graduate students and scientists newly entering this field, this book provides a review not only of these explosions, but the detailed physical models used to explain them from the numerical techniques used to model neutrino transport and gamma-ray transport to the detailed nuclear physics behind the evolution of the collapse to the observations that have led to these three classes of explosions.
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 Search for Long-Duration Transient Gravitational Waves Associated with Magnetar Bursts during LIGO's Sixth Science Run by : Ryan Quitzow-James
Download or read book Search for Long-Duration Transient Gravitational Waves Associated with Magnetar Bursts during LIGO's Sixth Science Run written by Ryan Quitzow-James and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Isolated Neutron Stars: From the Surface to the Interior by : Silvia Zane
Download or read book Isolated Neutron Stars: From the Surface to the Interior written by Silvia Zane and published by Springer Science & Business Media. This book was released on 2007-05-22 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collation of the contributions presented at a major conference on isolated neutron stars held in London in April 2006. Forty years after the discovery of radio pulsars it presents an up-to-date description of the new vision of isolated neutron stars that has emerged in recent years. The great variety of isolated neutron stars, from pulsars to magnetars, is well covered by descriptions of recent observational results and presentations of the latest theoretical interpretation of these data.
