Determination of astrophysical parameters from the spherical gravitational wave detector data

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

doi:10.1093/mnras/274.3.670

Cited by 73 publications

(40 citation statements)

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“…Once a proper relation to the lab coordinate system is defined, the determination of the source direction follows immediately by inversion of this relationship [16].…”

Section: Quadrupole Decomposition Of the Gravitational Fieldmentioning

confidence: 99%

Techniques for detecting gravitational waves with a spherical antenna

Merkowitz

Johnson

1997

Phys. Rev. D

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We report the results of a theoretical and experimental study of a spherical gravitational wave antenna. We show that it is possible to understand the data from a spherical antenna with 6 radial resonant transducers attached to the surface in the truncated icosahedral arrangement. We find that the errors associated with small deviations from the ideal case are small compared to other sources of error, such as a finite signal-to-noise ratio. An in situ measurement technique is developed along with a general algorithm that describes a procedure for determining the direction of an external force acting on the antenna, including the force from a gravitational wave, using a combination of the transducer responses. The practicality of these techniques was verified on a room-temperature prototype antenna.

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“…Once a proper relation to the lab coordinate system is defined, the determination of the source direction follows immediately by inversion of this relationship [16].…”

Section: Quadrupole Decomposition Of the Gravitational Fieldmentioning

confidence: 99%

Techniques for detecting gravitational waves with a spherical antenna

Merkowitz

Johnson

1997

Phys. Rev. D

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“…The very first direct detection will provide a test for one of the predictions of the theory of general relativity. Then, continuous observation will allow testing other theories of gravitation [4,5], besides initiating gravitational astronomy [6,7].…”

Section: Gravitational Wave Sourcesmentioning

confidence: 99%

“…resonant-mass detectors. In principle this geometry has no preferred direction of observation (i.e., it is omnidirectional) and the five observables needed for gravitational as- tronomy could be obtained from only one detector appropriately equipped [6,11]. These are major advantages, but for many years bars were preferred because they were easier to machine and equip.…”

Section: Resonant-mass Detectorsmentioning

confidence: 99%

Challenges in signal analysis of resonant-mass gravitational wave detectors

Magalhães

2005

Braz. J. Phys.

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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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Determination of astrophysical parameters from the spherical gravitational wave detector data

Cited by 73 publications

References 0 publications

Techniques for detecting gravitational waves with a spherical antenna

Techniques for detecting gravitational waves with a spherical antenna

Challenges in signal analysis of resonant-mass gravitational wave detectors

Studying Schenberg noise spectral density using Finite Element Modeling

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