scholarly journals DETECTION OF GRAVITATIONAL WAVES FROM INSPIRALING, COMPACT BINARIES USING A NETWORK OF INTERFEROMETRIC DETECTORS

2000 ◽  
Vol 09 (03) ◽  
pp. 325-329 ◽  
Author(s):  
SUKANTA BOSE ◽  
ARCHANA PAI ◽  
SANJEEV DHURANDHAR
Keyword(s):  
Data Analysis ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Analysis Problem ◽  
Compact Binaries ◽  
Correlation Vector ◽  
Compact Binary ◽  
Interferometric Detectors ◽  
First Time ◽  
Laser Interferometric

We formulate the data analysis problem for the detection of the Newtonian waveform from an inspiraling, compact binary by a network of arbitrarily oriented and arbitrarily located laser interferometric gravitational-wave detectors. We obtain for the first time the relation between the optimal statistic and the magnitude of the network correlation vector, which is constructed from the matched network-filter.

scholarly journals Gravitational-wave searches in the era of Advanced LIGO and Virgo

2021 ◽  
pp. 2130022
Author(s):  
Sarah Caudill ◽  
Shivaraj Kandhasamy ◽  
Claudia Lazzaro ◽  
Andrew Matas ◽  
Magdalena Sieniawska ◽  
...  
Keyword(s):  
Data Analysis ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
The United States ◽  
Compact Binary ◽  
Current State ◽  
Analysis Methods ◽  
Long Duration ◽  
Transient Sources ◽  
Interferometric Detectors

The field of gravitational-wave astronomy has been opened up by gravitational-wave observations made with interferometric detectors. This review surveys the current state-of-the-art in gravitational-wave detectors and data analysis methods currently used by the Laser Interferometer Gravitational-Wave Observatory in the United States and the Virgo Observatory in Italy. These analysis methods will also be used in the recently completed KAGRA Observatory in Japan. Data analysis algorithms are developed to target one of four classes of gravitational waves. Short duration, transient sources include compact binary coalescences, and burst sources originating from poorly modeled or unanticipated sources. Long duration sources include sources which emit continuous signals of consistent frequency, and many unresolved sources forming a stochastic background. A description of potential sources and the search for gravitational waves from each of these classes are detailed.

scholarly journals A NEW METHOD TO CALCULATE THE STOCHASTIC BACKGROUND OF GRAVITATIONAL WAVES GENERATED BY COMPACT BINARIES

2013 ◽  
Vol 28 (38) ◽  
pp. 1350174 ◽  
Author(s):  
EDGARD F. D. EVANGELISTA ◽  
JOSÉ C. N. DE ARAUJO
Keyword(s):  
Gravitational Waves ◽  
Binary Systems ◽  
New Method ◽  
Orbital Parameters ◽  
Compact Binaries ◽  
Compact Binary ◽  
Stochastic Background ◽  
Einstein Telescope ◽  
Interferometric Detectors ◽  
Near Future

In the study of gravitational waves (GWs), the stochastic background generated by compact binary systems are among the most important kinds of signals. The reason for such an importance has to do with their probable detection by the interferometric detectors [such as the Advanced LIGO (ALIGO) and Einstein Telescope (ET)] in the near future. In this paper we are concerned with, in particular, the stochastic background of GWs generated by double neutron star (DNS) systems in circular orbits during their periodic and quasi-periodic phases. Our aim here is to describe a new method to calculate such spectra, which is based on an analogy with a problem of Statistical Mechanics. Besides, an important characteristic of our method is to consider the time evolution of the orbital parameters.

scholarly journals Data analysis of massive gravitational waves from gamma ray bursts

2017 ◽  
Vol 26 (13) ◽  
pp. 1750150
Author(s):  
P. Prasia ◽  
V. C. Kuriakose
Keyword(s):  
Data Analysis ◽  
Bayesian Analysis ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Massive Mode ◽  
Polarization Component ◽  
Current Configuration ◽  
Laser Interferometric

We investigate the detectability of massive mode of polarization of Gravitational Waves (GWs) in [Formula: see text] theory of gravity associated with Gamma Ray Bursts (GRBs) sources. We obtain the beam pattern function of Laser Interferometric Gravitational wave Observatory (LIGO) corresponding to the massive polarization of GWs and perform Bayesian analysis to study this polarization. It is found that the massive polarization component with a mass of [Formula: see text][Formula: see text]eV/c2 is too weak to be detected at LIGO with its current configuration.

scholarly journals Virgo and Gravitational-Wave Computing in Europe

2020 ◽  
Vol 245 ◽  
pp. 07050
Author(s):  
Stefano Bagnasco
Keyword(s):  
Gravitational Wave ◽  
Current Status ◽  
Low Latency ◽  
Observational Period ◽  
Compact Binaries ◽  
The Third ◽  
Compact Binary ◽  
Continuous Waves ◽  
The Us ◽  
Wave Event

Advanced Virgo is an interferometer for the detection of gravitational waves at the European Gravitational Observatory in Italy. Along with the two Advanced LIGO interferometers in the US, Advanced Virgo is being used to collect data from astrophysical sources such as compact binary coalescences and is currently running the third observational period, collecting gravitational wave event candidates at a rate of more than once per week. Data from the interferometer are processed by running search pipelines for several expected signals, from coalescing compact binaries to continuous waves and burst events. Furthermore, detector characterisation studies are run. Some of the processing needs to be done with low latency, to be able to provide triggers for other observatories and make multi-messenger observations possible. Deep searches are run offline on external computing centres. Thus, data needs also to be reliably and promptly distributed from the EGO site to computer centres in Europe and the US for further analysis and archival storage. Two of the defining characteristics of Virgo computing are the heterogeneity of the activities and the need to interoperate with LIGO. A very wide array of analysis pipelines differing in scientific target, implementation details and running environment assumptions have to be allowed to run ubiquitously and uniformly on dedicated resources and, in perspective, on heterogeneous infrastructures. The current status, possible strategies and outlook of Virgo computing are discussed.

scholarly journals The gravitational-wave physics

2017 ◽  
Vol 4 (5) ◽  
pp. 687-706 ◽  
Author(s):  
Rong-Gen Cai ◽  
Zhoujian Cao ◽  
Zong-Kuan Guo ◽  
Shao-Jiang Wang ◽  
Tao Yang
Keyword(s):  
Gravitational Wave ◽  
Gravitational Waves ◽  
Laser Interferometer ◽  
Direct Detection ◽  
Fundamental Physics ◽  
First Order ◽  
Compact Binary ◽  
First Order Phase Transition ◽  
First Order Phase ◽  
The Universe

Abstract The direct detection of gravitational wave by Laser Interferometer Gravitational-Wave Observatory indicates the coming of the era of gravitational-wave astronomy and gravitational-wave cosmology. It is expected that more and more gravitational-wave events will be detected by currently existing and planned gravitational-wave detectors. The gravitational waves open a new window to explore the Universe and various mysteries will be disclosed through the gravitational-wave detection, combined with other cosmological probes. The gravitational-wave physics is not only related to gravitation theory, but also is closely tied to fundamental physics, cosmology and astrophysics. In this review article, three kinds of sources of gravitational waves and relevant physics will be discussed, namely gravitational waves produced during the inflation and preheating phases of the Universe, the gravitational waves produced during the first-order phase transition as the Universe cools down and the gravitational waves from the three phases: inspiral, merger and ringdown of a compact binary system, respectively. We will also discuss the gravitational waves as a standard siren to explore the evolution of the Universe.

scholarly journals Unmodelled clustering methods for gravitational wave populations of compact binary mergers

2019 ◽  
Vol 488 (3) ◽  
pp. 3810-3817 ◽  
Author(s):  
Jade Powell ◽  
Simon Stevenson ◽  
Ilya Mandel ◽  
Peter Tiňo
Keyword(s):  
Gravitational Wave ◽  
Gaussian Mixture ◽  
Difficult Case ◽  
Clustering Methods ◽  
Compact Binaries ◽  
Mass Distributions ◽  
Compact Binary ◽  
Binary Mergers ◽  
Spin Distributions ◽  
Mixture Model Clustering

ABSTRACT The mass and spin distributions of compact binary gravitational-wave sources are currently uncertain due to complicated astrophysics involved in their formation. Multiple sub-populations of compact binaries representing different evolutionary scenarios may be present amongst sources detected by Advanced LIGO and Advanced Virgo. In addition to hierarchical modelling, unmodelled methods can aid in determining the number of sub-populations and their properties. In this paper, we apply Gaussian mixture model clustering to 1000 simulated gravitational-wave compact binary sources from a mixture of five sub-populations. Using both mass and spin as input parameters, we determine how many binary detections are needed to accurately determine the number of sub-populations and their mass and spin distributions. In the most difficult case that we consider, where two sub-populations have identical mass distributions but differ in their spin, which is poorly constrained by gravitational-wave detections, we find that ∼400 detections are needed before we can identify the correct number of sub-populations.

VEGA, AN ENVIRONMENT FOR GRAVITATIONAL WAVES DATA ANALYSIS

2000 ◽  
Vol 09 (03) ◽  
pp. 293-297 ◽  
Author(s):  
D. BUSKULIC ◽  
L. DEROME ◽  
R. FLAMINIO ◽  
F. MARION ◽  
L. MASSONET ◽  
...  
Keyword(s):  
Data Analysis ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Large Scale ◽  
Data Access ◽  
The World ◽  
Gravitational Wave Detectors ◽  
Batch Data ◽  
New Generation

A new generation of large scale and complex Gravitational Wave detectors is building up. They will produce big amount of data and will require intensive and specific interactive/batch data analysis. We will present VEGA, a framework for such data analysis, based on ROOT. VEGA uses the Frame format defined as standard by GW groups around the world. Furthermore, new tools are developed in order to facilitate data access and manipulation, as well as interface with existing algorithms. VEGA is currently evaluated by the VIRGO experiment.

scholarly journals Coincidence and coherent data analysis methods for gravitational wave bursts in a network of interferometric detectors

2003 ◽  
Vol 68 (10) ◽  
Author(s):  
Nicolas Arnaud ◽  
Matteo Barsuglia ◽  
Marie-Anne Bizouard ◽  
Violette Brisson ◽  
Fabien Cavalier ◽  
...  
Keyword(s):  
Data Analysis ◽  
Gravitational Wave ◽  
Analysis Methods ◽  
Wave Bursts ◽  
Interferometric Detectors ◽  
Data Analysis Methods

scholarly journals MATCHING OF THE CONTINUOUS GRAVITATIONAL WAVE IN AN ALL SKY SEARCH

2003 ◽  
Vol 12 (07) ◽  
pp. 1227-1239 ◽  
Author(s):  
S. K. SAHAY
Keyword(s):  
Gravitational Wave ◽  
Source Location ◽  
The Other ◽  
Interferometric Detectors ◽  
Laser Interferometric

We investigate the matching of continuous gravitational wave (CGW) signals in an all sky search with reference to Earth based laser interferometric detectors. We consider the source location as the parameters of the signal manifold and templates corresponding to different source locations. It has been found that the matching of signals from locations in the sky that differ in their co-latitude and longitude by π radians decreases with source frequency. We have also made an analysis with the other parameters affecting the symmetries. We observe that it may not be relevant to take care of the symmetries in the sky locations for the search of CGW from the output of LIGO-I, GEO600 and TAMA detectors.

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