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.

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 Reconstruction of source location in a network of gravitational wave interferometric detectors

2006 ◽  
Vol 74 (8) ◽  
Author(s):  
Fabien Cavalier ◽  
Matteo Barsuglia ◽  
Marie-Anne Bizouard ◽  
Violette Brisson ◽  
André-Claude Clapson ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Source Location ◽  
Interferometric Detectors

scholarly journals THE ROLE OF THE QUANTUM PROPERTIES OF GRAVITATIONAL RADIATION IN THE DETECTION OF GRAVITATIONAL WAVES

1999 ◽  
Vol 14 (13) ◽  
pp. 1997-2012 ◽  
Author(s):  
A. CAMACHO
Keyword(s):  
Gravitational Wave ◽  
Gravitational Radiation ◽  
Measuring Device ◽  
Quantum Properties ◽  
Large Dispersion ◽  
Experimental Apparatus ◽  
Definition Of ◽  
Interferometric Detectors ◽  
Laser Interferometric

The role that the quantum properties of a gravitational wave could play in the detection of gravitational radiation is analyzed. It is not only corroborated that in the current laser-interferometric detectors the resolution of the experimental apparatus could lie very far from the corresponding quantum threshold (thus the backreaction effect of the measuring device upon the gravitational wave is negligible), but it is also suggested that the consideration of the quantum properties of the wave could entail the definition of dispersion of the measurement outputs. This dispersion would be a function not only of the sensitivity of the measuring device, but also of the interaction time (between measuring device and gravitational radiation) and of the arm length of the corresponding laser interferometer. It would have a minimum limit, and the introduction of the current experimental parameters suggests that the dispersion of the existing proposals could lie very far from this minimum, which means that they would show a very large dispersion.

scholarly journals Laser-interferometric detectors for gravitational wave backgrounds at 100 MHz: Detector design and sensitivity

2008 ◽  
Vol 77 (2) ◽  
Author(s):  
Atsushi Nishizawa ◽  
Seiji Kawamura ◽  
Tomotada Akutsu ◽  
Koji Arai ◽  
Kazuhiro Yamamoto ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Interferometric Detectors ◽  
Laser Interferometric ◽  
Detector Design

scholarly journals Optimal location of two laser-interferometric detectors for gravitational wave backgrounds at 100 MHz

2008 ◽  
Vol 25 (22) ◽  
pp. 225011 ◽  
Author(s):  
Atsushi Nishizawa ◽  
Seiji Kawamura ◽  
Tomotada Akutsu ◽  
Koji Arai ◽  
Kazuhiro Yamamoto ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Optimal Location ◽  
Interferometric Detectors ◽  
Laser Interferometric

PRESENT STATUS OF CLIO IN 2004

2005 ◽  
Vol 20 (29) ◽  
pp. 7066-7068
Author(s):  
◽  
TAKASHI UCHIYAMA
Keyword(s):  
Gravitational Wave ◽  
Present Status ◽  
Laser Interferometer ◽  
The Other ◽  
Cryogenic System ◽  
Seismic Vibration ◽  
Under Construction ◽  
Interferometric Detectors

The CLIO project in Japan consists of two kinds of interferometric detectors in a tunnel of Kamioka mine. One is a geophysical strain meter and the other one is a gravitational wave (GW) detector. The GW detector is called Cryogenic Laser Interferometer Observatory (CLIO). The characteristics of CLIO are the use of cryogenic to reduce the thermal noises and an underground site for low seismic vibration. CLIO is under construction, and installation of the first cryogenic system was completed in the autumn of 2004.

scholarly journals Relationship between Bondi–Sachs quantities and source of gravitational radiation in asymptotically de Sitter spacetime

2018 ◽  
Vol 27 (04) ◽  
pp. 1850046 ◽  
Author(s):  
Xiaokai He ◽  
Jiliang Jing ◽  
Zhoujian Cao
Keyword(s):  
Cosmological Constant ◽  
Gravitational Wave ◽  
Gravitational Radiation ◽  
The Other ◽  
Perturbation Approach ◽  
De Sitter Spacetime ◽  
De Sitter ◽  
Positive Cosmological Constant ◽  
Sitter Spacetime ◽  
Explicit Expressions

Gravitational radiation plays an important role in astrophysics. Based on the fact that our universe is expanding, the gravitational radiation when a positive cosmological constant is presented has been studied along with two different ways recently, one is the Bondi–Sachs (BS) framework in which the result is shown by BS quantities in the asymptotic null structure, the other is the perturbation approach in which the result is presented by the quadrupoles of source. Therefore, it is worth to interpret the quantities in asymptotic null structure in terms of the information of the source. In this paper, we investigate this problem and find the explicit expressions of BS quantities in terms of the quadrupoles of source in asymptotically de Sitter spacetime. We also estimate how far away the source is, the cosmological constant may affect the detection of the gravitational wave.

scholarly journals Geometric Approach to Analytic Marginalisation of the Likelihood Ratio for Continuous Gravitational Wave Searches

Universe ◽  
2021 ◽  
Vol 7 (6) ◽  
pp. 174
Author(s):  
Karl Wette
Keyword(s):  
Gravitational Wave ◽  
Likelihood Ratio ◽  
Signal To Noise Ratio ◽  
Geometric Approach ◽  
The Other ◽  
Efficient Computation ◽  
Likelihood Ratios ◽  
Signal To Noise ◽  
Noise Ratio ◽  
Optimal Signal

The likelihood ratio for a continuous gravitational wave signal is viewed geometrically as a function of the orientation of two vectors; one representing the optimal signal-to-noise ratio, and the other representing the maximised likelihood ratio or F-statistic. Analytic marginalisation over the angle between the vectors yields a marginalised likelihood ratio, which is a function of the F-statistic. Further analytic marginalisation over the optimal signal-to-noise ratio is explored using different choices of prior. Monte-Carlo simulations show that the marginalised likelihood ratios had identical detection power to the F-statistic. This approach demonstrates a route to viewing the F-statistic in a Bayesian context, while retaining the advantages of its efficient computation.

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