A search for periodic gravitational-wave signals from isolated neutron stars in the NAUTILUS detector data is presented. We have analyzed half a year of data over the frequency band < 922.2; 923.2 > Hz, the spindown range <-1.463 x 10(-8); 0 > Hz/s and over the entire sky. We have divided the data into two day stretches and we have analyzed each stretch coherently using matched filtering. We have imposed a low threshold for the optimal detection statistic to obtain a set of candidates that are further examined for coincidences among various data stretches. For some candidates we have also investigated the change of the signal-to-noise ratio when we increase the observation time from 2 to 4 days. Our analysis has not revealed any gravitational-wave signals. Therefore we have imposed upper limits on the dimensionless gravitational-wave amplitude over the parameter space that we have searched. Depending on frequency, our upper limit ranges from 3.4 x 10(-23) to 1.3 x 10(-22). We have attempted a statistical verification of the hypotheses leading to our conclusions. We estimate that our upper limit is accurate to within 18%.

Astone, P., Bassan, M., Bonifazi, P., Borkowski, K., Budzynski, R., Chincarini, A., et al. (2008). All-sky search of NAUTILUS data. In Classical and Quantum Gravity. BRISTOL : IOP PUBLISHING LTD [10.1088/0264-9381/25/18/184012].

All-sky search of NAUTILUS data

BASSAN, MASSIMO;COCCIA, EUGENIO;FAFONE, VIVIANA;MOLETI, ARTURO;PIZZELLA, GUIDO;
2008-01-01

Abstract

A search for periodic gravitational-wave signals from isolated neutron stars in the NAUTILUS detector data is presented. We have analyzed half a year of data over the frequency band < 922.2; 923.2 > Hz, the spindown range <-1.463 x 10(-8); 0 > Hz/s and over the entire sky. We have divided the data into two day stretches and we have analyzed each stretch coherently using matched filtering. We have imposed a low threshold for the optimal detection statistic to obtain a set of candidates that are further examined for coincidences among various data stretches. For some candidates we have also investigated the change of the signal-to-noise ratio when we increase the observation time from 2 to 4 days. Our analysis has not revealed any gravitational-wave signals. Therefore we have imposed upper limits on the dimensionless gravitational-wave amplitude over the parameter space that we have searched. Depending on frequency, our upper limit ranges from 3.4 x 10(-23) to 1.3 x 10(-22). We have attempted a statistical verification of the hypotheses leading to our conclusions. We estimate that our upper limit is accurate to within 18%.
12th Gravitational Wave Data Analysis Workshop
Cambridge, MA
DEC 13-16, 2007
MIT, LIGO Lab
Rilevanza internazionale
2008
Settore FIS/01 - FISICA SPERIMENTALE
English
GRAVITATIONAL-WAVES
Intervento a convegno
Astone, P., Bassan, M., Bonifazi, P., Borkowski, K., Budzynski, R., Chincarini, A., et al. (2008). All-sky search of NAUTILUS data. In Classical and Quantum Gravity. BRISTOL : IOP PUBLISHING LTD [10.1088/0264-9381/25/18/184012].
Astone, P; Bassan, M; Bonifazi, P; Borkowski, K; Budzynski, R; Chincarini, A; Coccia, E; D'Antonio, S; Di Paolo Emilio, M; Fafone, V; Frasca, S; Foffa, S; Giordano, G; Jaranowski, P; Kondracki, W; Krolak, A; Maggiore, M; Marini, A; Moleti, A; Pizzella, G; ., [al]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/33774
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