Increasing the bandwidth of resonant gravitational antennas: The case of Explorer

Details Increasing the bandwidth of resonant gravitational antennas: The case of Explorer Increasing the bandwidth of resonant gravitational antennas: The case of Explorer

2003-07-30

arxiv.org/abs/gr-qc/0307120v1

Phys.Rev.Lett. 91 (2003) 111101

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages- 4 figures Acceted for publication on Physical Review Letters

Scientific paper

10.1103/PhysRevLett.91.111101

Resonant gravitational wave detectors with an observation bandwidth of tens of hertz are a reality: the antenna Explorer, operated at CERN by the ROG collaboration, has been upgraded with a new read-out. In this new configuration, it exhibits an unprecedented useful bandwidth: in over 55 Hz about its frequency of operation of 919 Hz the spectral sensitivity is better than 10^{-20} /sqrt(Hz) . We describe the detector and its sensitivity and discuss the foreseable upgrades to even larger bandwidths.

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