Black-hole ringdown search in TAMA300: matched filtering and event selections

Details Black-hole ringdown search in TAMA300: matched filtering and event selections Black-hole ringdown search in TAMA300: matched filtering and event selections

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005cqgra..22s1129t&link_type=abstract

Classical and Quantum Gravity, Volume 22, Issue 18, pp. S1129-S1138 (2005).

Mathematics

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7

Scientific paper

Detecting gravitational ringdown waves provides a probe for direct observation of astrophysical black holes. The masses and angular momenta of black holes can be determined from the waveforms by using the black-hole perturbation theory. In this paper we present data analysis methods to search for black-hole ringdowns of fundamental quasi-normal modes with interferometric gravitational wave detectors, and report an application to the TAMA300 data. Our method is based upon matched filtering by which we calculate cross-correlations between detector outputs and reference waveforms. In a search for gravitational signals, fake reductions and event identifications are of most importance. We developed two methods to reject spurious triggers in filter outputs in the time domain and examined their reduction powers. It is shown that by using the methods presented here the number of fake triggers can be reduced by an order with a false dismissal probability of 5%. We also discuss the possibility of using the higher order quasi-normal modes for event selection.

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