On-line consistency tests for bar detectors

In order to detect gravitational wave signals with resonant bar detectors u sing Wiener-Kolmogorov (WK) filters, both a model for the power spectrum de nsity (PSD) of the noise and a signal template should be provided. As the a nalysis is not meant to handle non-gaussian data, we have to discriminate ( and constrain to) time periods where the noise follows a quasi-stationary g aussian model. Within these periods, candidate events are selected in the W K filter output, and their fundamental parameters (time of arrival and ampl itude) are computed. A necessary and sufficient condition for the reliabili ty of such estimates is the consistency of the signal shape with the templa te. This is done performing a goodness-of-the-fit test.