ar X iv : 0 80 9 . 02 73 v 1 [ gr - q c ] 1 S ep 2 00 8 All - sky search of NAUTILUS data
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چکیده
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 × 10; 0〉Hz/s and over the entire sky. We have divided the data into 2 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 two to four 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 to 1.3 × 10. We have attempted a statistical verification of the hypotheses leading to our conclusions. We estimate that our upper limit is accurate to within 18%. Submitted to: Class. Quantum Grav. ♯ [email protected] All-sky search of NAUTILUS data 2
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ar X iv : 1 51 1 . 04 39 8 v 2 [ gr - q c ] 1 8 Fe b 20 16 All - sky search for long - duration gravitational wave transients with initial LIGO
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تاریخ انتشار 2008