Sub-Millisecond Absolute Timing: Toward an Actual Gravitational Observatory

1997 ◽  
Vol 12 (30) ◽  
pp. 2261-2264 ◽  
Author(s):  
M. Cerdonio ◽  
V. Crivelli Visconti ◽  
A. Ortolan ◽  
G. Prodi ◽  
L. Taffarello ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Global Network ◽  
Necessary Condition ◽  
The Future ◽  
Gravitational Wave Detectors

In this letter we report the results we obtained experimentally demonstrating the feasibility of absolute timing of impulsive gravitational wave signals by means of a resonant bar detector. We reached a resolution of less than 20 μs for SNR ≥ 10. We also discuss the important prospects this result opens for the present and for the future, as a necessary condition for the implementation of a global network of gravitational wave detectors.

scholarly journals Quasi-monolithic mirror suspensions in ground-based gravitational-wave detectors: an overview and look to the future

2018 ◽  
Vol 376 (2120) ◽  
pp. 20170281 ◽  
Author(s):  
Anna-Maria A. van Veggel
Keyword(s):  
Gravitational Wave ◽  
Seismic Isolation ◽  
Thermal Noise ◽  
Fused Silica ◽  
New Era ◽  
The Future ◽  
Gravitational Wave Detectors ◽  
The Status ◽  
History Of ◽  
The Universe

At the commencement of a new era in astrophysics, with added information from direct detections of gravitational-wave (GW) signals, this paper is a testament to the quasi-monolithic suspensions of the test masses of the GW detectors that have enabled the opening of a new window on the universe. The quasi-monolithic suspensions are the final stages in the seismic isolation of the test masses in GW detectors, and are specifically designed to introduce as little thermal noise as possible. The history of the development of the fused-silica quasi-monolithic suspensions, which have been so essential for the first detections of GWs, is outlined and a glimpse into the status of research towards quasi-monolithic suspensions made of sapphire and silicon is given. This article is part of a discussion meeting issue ‘The promises of gravitational-wave astronomy’.

ADVANCED GRAVITATIONAL WAVE DETECTORS AND THE GLOBAL NETWORK

2005 ◽  
Vol 20 (29) ◽  
pp. 7045-7053 ◽  
Author(s):  
ANDREA VICERÉ
Keyword(s):  
Gravitational Wave ◽  
Global Network ◽  
Wide Range ◽  
Gravitational Wave Detectors ◽  
Alternative Techniques ◽  
New Generation

A wide range of gravitational wave detectors is currently operating, and in a few years will reach a sensitivity enabling them to potentially detect sources tens of megaparsec away. In the next years, the instruments will be upgraded, giving birth to a new generation of improved, more sensitive detectors. Alternative techniques are also being explored which have the potential in a longer term of even better sensitivities. Such improvements are needed to turn a still elusive hunt for a first detection into a real gravitational-wave astronomy; it is the purpose of this talk to outline the path toward the design and realization of advanced detectors, and to discuss how they will be integrated into a global network.

Interferometric gravitational wave detectors

2018 ◽  
Vol 27 (07) ◽  
pp. 1840001
Author(s):  
Peter R. Saulson
Keyword(s):  
Gravitational Wave ◽  
Global Network ◽  
Clear Understanding ◽  
Current Generation ◽  
Gravitational Wave Detection ◽  
Wave Detection ◽  
Gravitational Wave Detectors

Gravitational wave detection has now entered the era in which signals are being found. It is timely, therefore, to review the current detectors and how they work. This review focuses on the dramatic arc that links the earliest clear understanding of gravitational wave detection with the current generation of detectors. I will also discuss the prospects for expansion of the global network of gravitational wave detectors, with special attention to the role of LIGO-India.

scholarly journals Fiducial displacements with improved accuracy for the global network of gravitational wave detectors

2020 ◽  
Vol 38 (1) ◽  
pp. 015009
Author(s):  
D Bhattacharjee ◽  
Y Lecoeuche ◽  
S Karki ◽  
J Betzwieser ◽  
V Bossilkov ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Global Network ◽  
Gravitational Wave Detectors ◽  
Improved Accuracy

scholarly journals The science case for LIGO-India

2021 ◽  
Author(s):  
Mohammed Saleem ◽  
Javed Rana ◽  
V. Gayathri ◽  
Aditya Vijaykumar ◽  
Srashti Goyal ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Global Network ◽  
Duty Factor ◽  
Fundamental Physics ◽  
Detection Rates ◽  
Compact Binaries ◽  
Gravitational Wave Detectors ◽  
Multiple Detectors

Abstract The global network of gravitational-wave detectors has completed three observing runs with ∼50 detections of merging compact binaries. A third LIGO detector, with comparable astrophysical reach, is to be built in India (LIGO-Aundha) and expected to be operational during the latter part of this decade. Such additions to the network increase the number of baselines and the network SNR of GW events. These enhancements help improve the sky-localization of those events. Multiple detectors simultaneously in operation will also increase the baseline duty factor, thereby, leading to an improvement in the detection rates and, hence, the completeness of surveys. In this paper, we quantify the improvements due to the expansion of the LIGO Global Network (LGN) in the precision with which source properties will be measured. We also present examples of how this expansion will give a boost to tests of fundamental physics.

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