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EnglishA 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.M., Budzynski, R.J., 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].
| Autori: | ||
| Autori: | Astone, P; Bassan, M; Bonifazi, P; Borkowski, KM; Budzynski, RJ; Chincarini, A; Coccia, E; D'Antonio, S; Di Paolo Emilio, MDP; Fafone, V; Frasca, S; Foffa, S; Giordano, G; Jaranowski, P; Kondracki, W; Krolak, A; Maggiore, M; Marini, A; Moleti, A; Pizzella, G; ... [et al.] | |
| Titolo: | All-sky search of NAUTILUS data | |
| Nome del convegno: | 12th Gravitational Wave Data Analysis Workshop | |
| Luogo del convegno: | Cambridge, MA | |
| Anno del convegno: | DEC 13-16, 2007 | |
| Enti collegati al convegno: | MIT, LIGO Lab | |
| Rilevanza: | Rilevanza internazionale | |
| Data di pubblicazione: | 2008 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1088/0264-9381/25/18/184012 | |
| Settore Scientifico Disciplinare: | Settore FIS/01 - Fisica Sperimentale | |
| Lingua: | English | |
| Tipologia: | Intervento a convegno | |
| Citazione: | Astone, P., Bassan, M., Bonifazi, P., Borkowski, K.M., Budzynski, R.J., 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]. | |
| Appare nelle tipologie: | 02 - Intervento a convegno |
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