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In order to detect gravitational wave signals with resonant bar detectors using Wiener-Kolmogorov (WK) filters, both a model for the power spectrum density (PSD) of the noise and a signal template should be provided. As the analysis is not meant to handle non-gaussian data, we have to discriminate (and constrain to) time periods where the noise follows a quasi-stationary gaussian model. Within these periods, candidate events are selected in the WK filter output, and their fundamental parametersdoi:10.1142/s0218271800000232 fatcat:7darnoyekfdvllnszf3hfng5pq