A Geometric Method for Location of Gravitational Wave Sources

Magalhães, Nadja S.; Johnson, W. W.; Frajuca, Carlos; Aguiar, O. D.

doi:10.1086/303541

Cited by 57 publications

(33 citation statements)

References 7 publications

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“…Our ability to extract the signal from the noise will depend on the signalto-noise ratio (SNR) achieved for the particular event. This has been investigated by Merkowitz [12] and Merkowitz, Lobo and Serrano [13], partly using an approach first presented in Magalhães et al [14]. In the present work we will not approach this issue in depth, but leave it to be discussed elsewhere.…”

Section: The Inverse Problemmentioning

confidence: 96%

Solution of the inverse problem in spherical gravitational wave detectors using a model with independent bars

et al. 2008

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The direct detection of gravitational waves will provide valuable astrophysical information about many celestial objects. The SCHENBERG has already undergone its first test run. It is expected to have its first scientific run soon. In this work a new data analysis approach is presented, called the method of independent bars, which can be used with SCHENBERG's data. We test this method through the simulation of the detection of gravitational waves. With this method we find the source's direction without the need to have all six transducers operational. Also, we show that the method is a generalization of another one, already described in the literature, known as the mode channels method.

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Section: The Inverse Problemmentioning

confidence: 96%

Solution of the inverse problem in spherical gravitational wave detectors using a model with independent bars

et al. 2008

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“…The sensors will be located as if in the center of the six connected pentagons in a dodecahedron surface, following the studies by Merkowitz and Johnson 6,7 confirmed by Magalhaes and collaborators 8 . By analyzing the signal of such sensors, the amplitudes and the direction of the incoming gravitation wave can be obtained 9,10 . The Schenberg group has decided to use microwave parametric transducers as motion sensors like the one used in the Australian GW detector NIOBÈ 11 .…”

Section: Introductionmentioning

confidence: 99%

Studying Schenberg noise spectral density using Finite Element Modeling

Bortoli¹,

Frajuca²,

Magalhães³

2017

The Fourteenth Marcel Grossmann Meeting

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Schenberg is a detector of gravitational waves resonant mass type. The central frequency of operation is 3200 Hz. Transducers located on the surface of the resonating sphere according to a distribution half-dodecahedron are used to monitor a strain amplitude. The development of mechanical impedance matchers that act by increasing the coupling of the transducers with the sphere is a major challenge because of the high frequency and small in size. The objective of this work is to study the spectral density curve deformation noise obtained by finite element modeling (FEM), compared to the result of the simplified model for mass-spring type system modeling verifying if that is suitable for the determination of sensitivity detector, as the conclusion the both modelling give the same results.

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“…The detector will have six transducers, arranged in the sphere surface in a half-dodecahedron distribution; the sensors will be located as if in the center of the 6 connected pentagons in a dodecahedron surface. By analyzing the signal of such sensors the intensity and the direction of the incoming gravitation wave can be obtained [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Resonant transducers for spherical gravitational wave detectors

Frajuca¹,

Bortoli²,

Magalhães³

2005

Braz. J. Phys.

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"Mario Schenberg" is a spherical gravitational wave (GW) detector that will be part of a GW detection array of two detectors. Another one is been built in The Netherlands. Spherical gravitational wave detector is a resonant-mass detector, which signal comes when the GW passes through and causes vibrations in a spherical mass. The resonant frequencies of this array will be around 3.2 kHz with a bandwidth of about 200 Hz. This range of frequencies is new in a fi eld where the typical frequencies lay below 1 kHz, making the transducer development some more complex. In this work we made a series of fi ne element studies in sphere coupled to a resonant mushroom shape resonator that will work as a mechanical impedance matcher between the sphere and the transducer. We describe the search for a shape in the impedance matcher that will improve the performance of the detector.

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A Geometric Method for Location of Gravitational Wave Sources

Cited by 57 publications

References 7 publications

Solution of the inverse problem in spherical gravitational wave detectors using a model with independent bars

Solution of the inverse problem in spherical gravitational wave detectors using a model with independent bars

Studying Schenberg noise spectral density using Finite Element Modeling

Resonant transducers for spherical gravitational wave detectors

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