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 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 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 Search Methods for Continuous Gravitational-Wave Signals from Unknown Sources in the Advanced-Detector Era

Universe ◽  
2021 ◽  
Vol 7 (12) ◽  
pp. 474
Author(s):  
Rodrigo Tenorio ◽  
David Keitel ◽  
Alicia M. Sintes
Keyword(s):  
Gravitational Wave ◽  
Gravitational Waves ◽  
Main Stage ◽  
Free Precession ◽  
Search Methods ◽  
Current State ◽  
Upper Limits ◽  
Interferometric Detectors ◽  
Processing Steps ◽  
Rule Out

Continuous gravitational waves are long-lasting forms of gravitational radiation produced by persistent quadrupolar variations of matter. Standard expected sources for ground-based interferometric detectors are neutron stars presenting non-axisymmetries such as crustal deformations, r-modes or free precession. More exotic sources could include decaying ultralight boson clouds around spinning black holes. A rich suite of data-analysis methods spanning a wide bracket of thresholds between sensitivity and computational efficiency has been developed during the last decades to search for these signals. In this work, we review the current state of searches for continuous gravitational waves using ground-based interferometer data, focusing on searches for unknown sources. These searches typically consist of a main stage followed by several post-processing steps to rule out outliers produced by detector noise. So far, no continuous gravitational wave signal has been confidently detected, although tighter upper limits are placed as detectors and search methods are further developed.

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.

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 Gravitational Waves and Time-Domain Astronomy

2011 ◽  
Vol 7 (S285) ◽  
pp. 191-198 ◽  
Author(s):  
Joan Centrella ◽  
Samaya Nissanke ◽  
Roy Williams
Keyword(s):  
Gravitational Wave ◽  
Gravitational Waves ◽  
Time Domain ◽  
Low Frequency ◽  
High Energy ◽  
Massive Black Hole ◽  
Compact Binary ◽  
Challenges And Opportunities ◽  
Binary Mergers

AbstractThe gravitational-wave window onto the universe will open in roughly five years, when Advanced LIGO and Virgo achieve the first detections of high-frequency gravitational waves, most likely coming from compact binary mergers. Electromagnetic follow-up of these triggers, using radio, optical, and high energy telescopes, promises exciting opportunities in multi-messenger time-domain astronomy. In the decade, space-based observations of low-frequency gravitational waves from massive black hole mergers, and their electromagnetic counterparts, will open up further vistas for discovery. This two-part workshop featured brief presentations and stimulating discussions on the challenges and opportunities presented by gravitational-wave astronomy. Highlights from the workshop, with the emphasis on strategies for electromagnetic follow-up, are presented in this report.

EARLY DETECTION AND LOCALIZATION OF GRAVITATIONAL WAVES FROM COMPACT BINARY COALESCENCES

2013 ◽  
Vol 22 (11) ◽  
pp. 1360011 ◽  
Author(s):  
LINQING WEN ◽  
QI CHU
Keyword(s):  
Neutron Star ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Real Time ◽  
Wide Field ◽  
Compact Binary ◽  
Black Hole Binary ◽  
Star Binary ◽  
Detection And Localization

With the first detection of gravitational waves expected in the next decade, increasing efforts are made toward the electromagnetic follow-up observations of gravitational wave events. In this paper, I discuss the prospect of real-time detection and source localization for gravitational waves from neutron star–neutron star binary or neutron star–black hole binary coalescences before their merger. I show that several low-latency search pipelines are already under intensive development with the aim to provide real-time detections of these events. There will also be fast responding and/or wide-field electromagnetic telescopes available to help catch the electromagnetic or particle flashes possibly occurring during or immediately after their merger. It has been shown that a few coalescence events per year can be detected by advanced LIGO-VIRGO detector network tens of seconds before their merger. However, most of these events will have poor sky direction localization for the existing gravitational-wave detector network, making it extremely challenging for follow up observations by astronomical telescopes aiming at catching events around the merger time. A larger detector network including the planned detectors in Japan and in India will play an important role in improving the angular resolution and making prompt follow up observations much more realistic. A new detector at the Southern Hemisphere AIGO will further contribute significantly to this aspect.

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.

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