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An all-sky search of EXPLORER data

P Astone1, D Babusci2, M Bassan3, K M Borkowski4, L Brocco5, E Coccia3, S D'Antonio3, V Fafone2, S Frasca5, G Giordano2, P Jaranowski6, A Królak7,10, A Marini2, Y Minenkov3, I Modena3, G Modestino2, A Moleti3, A Pai1, G V Pallottino5, C Palomba1, M Pietka6, G Pizzella8, L Quintieri2, F Ricci5, A Rocchi3, F Ronga2, R Terenzi9 and M Visco9

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We have analysed three data sets, each two days long, of the EXPLORER resonant bar detector. We have searched for continuous gravitational-wave signals from spinning neutron stars. Our data analysis technique was based on the maximum likelihood detection method. We briefly describe the theoretical methods that we used in our search and we present results of the search. The main outcome of our analysis is an upper limit of 1 × 10−22 for the dimensionless amplitude of a continuous gravitational-wave signal. The upper limit is for any source location in the sky, any polarization of the wave and for signals of frequency from 921.00 Hz to 921.76 Hz and with spin down from −2.36 × 10−8 Hz s−1 to +2.36 × 10−8 Hz s−1.


PACS

04.80.Nn Gravitational wave detectors and experiments

07.05.Kf Data analysis: algorithms and implementation; data management

97.60.Jd Neutron stars

95.55.Ym Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques

MSC

68P10 Searching and sorting

83C35 Gravitational waves

60G15 Gaussian processes

Subjects

Instrumentation and measurement

Gravitation and cosmology

Astrophysics and astroparticles

Dates

Issue 18 (21 September 2005)

Received 15 April 2005, in final form 28 June 2005

Published 6 September 2005



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