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          Institute: MPI für Gravitationsphysik     Collection: Observational Relativity and Cosmology     Display Documents



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ID: 398661.0, MPI für Gravitationsphysik / Observational Relativity and Cosmology
All-sky search of NAUTILUS data
Authors:Astone, P.; Bassan, M.; Bonifazi, P.; Borkowski, K. M.; Budzynski, R. J.; Chincarini, A.; Coccia, E.; D'Antonio, S.; Di Paolo Emilio, M.; Fafone, V.; Frasca, Sergio; Foffa, S.; Giordano, G.; Jaranowski, Piotr; Kondracki, W.; Krolak, Andrzej; Maggiore, M.; Marini, A.; Minenkov, Y.; Modena, I.; Modestino, G.; Moleti, A.; Pallottino, G. V.; Palomba, Cristiano; Parodi, R.; Pietka, M.; Pizzella, G.; Pletsch, Holger; Quintieri, L.; Ricci, F.; Rocchi, A.; Ronga, F.; Sturani, R.; Terenzi, R.; Vaccarone, R.; Visco, M.
Date of Publication (YYYY-MM-DD):2008-09-21
Title of Journal:Classical and Quantum Gravity
Volume (in Journal):25
Issue / Number:18
Sequence Number:184012
Name of Conference/Meeting:12th Gravitational Wave Data Analysis Workshop
Place of Conference/Meeting:Cambridge, MA
(Start) Date of Conference/Meeting
 (YYYY-MM-DD):
2007-12-13
End Date of Conference/Meeting 
 (YYYY-MM-DD):
2007-12-16
Review Status:Peer-review
Audience:Not Specified
Abstract / Description: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 lang922.2; 923.2rang Hz, the spindown range lang − 1.463 × 10−8; 0rang 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 × 10−23 to 1.3 × 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%.
External Publication Status:published
Document Type:Conference-Paper
Communicated by:Bruce Allen
Affiliations:MPI für Gravitationsphysik/Teilinstitut Hannover
MPI für Gravitationsphysik/Observational Relativity and Cosmology
Identifiers:ISSN:0264-9381
DOI:10.1088/0264-9381/25/18/184012
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