Events trigger generator for resonant spherical detectors of gravitational waves

Abstract

We have set up and tested a pipeline for processing the data from a spherical gravitational wave detector with six transducers. The algorithm exploits the multichannel capability of the system and provides a list of candidate events with their arrival direction. The analysis starts with the conversion of the six detector outputs into the scalar and the five quadrupolar modes of the sphere, which are proportional to the corresponding gravitational wave spherical components. Event triggers are then generated by an adaptation of the WaveBurst algorithm. Event validation and direction reconstruction are made by cross-checking two methods of different inspiration: geometrical (lowest eigenvalue) and probabilistic (maximum likelihood). The combination of the two methods is able to keep substantially unaltered the efficiency and can reduce drastically the detections of fake events (to less than ten per cent). We show a quantitative test of these ideas by simulating the operation of the resonant spherical detector miniGRAIL, whose planned sensitivity in its frequency band (few hundred Hertz's around 3 kHz) is comparable with the present LIGO one.

arXiv comment14 pages, 8 figures. Version accepted for publication on CQG. Proceedings of the 12th Gravitational Wave Data Analysis Workshop

References in corpus (11)

• Gravitational Waves from Coalescing Black Hole MACHO Binaries
• Measuring gravitational waves from binary black hole coalescences: II. the waves' information and its extraction, with and without templates
• An excess power statistic for detection of burst sources of gravitational radiation
• Constraint Likelihood analysis for a network of gravitational wave detectors
• The TIGA technique for detecting gravitational waves with a spherical antenna
• Performance of the WaveBurst algorithm on LIGO data
• The mathematical theory of resonant transducers in a spherical gravity wave antenna
• Quark matter imprint on Gravitational Waves from oscillating stars
• Complete model of a spherical gravitational wave detector with capacitive transducers. Calibration and sensitivity optimization
• Solution to the inverse problem for a noisy spherical gravitational wave antenna
• Matched filter for multi-transducers resonant GW antennas

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