MG13 - Talk detail

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The direct detection of Gravitational waves (GW) is one of the biggest experimental challenges today. This work is focused on the detection of monochromatic gravitational wave (GW) signals from pulsars using data of ALLEGRO's antenna. It makes use of a method tailored for the detection of monochromatic signals in the middle of strong noise, which basically it monitor, for a given frequency, the excess power in the power spectrum of the data. An analysis is performed on the frequency of 47 Tucanae pulsars, searching for frequency drifts that might present a pattern similar to the one due to the Doppler modulation. The method is expected to be useful even in the presence of very noisy data, by reducing the noise to a level inferior to the one of the monochromatic signals and performing the Doppler modulation analysis. We tested the method injecting a simulated signal in real data and we were able to detect it. We made a statistical study about the results of this method. The selection of candidate events will then be established according to Neyman-Pearson criterion. We will show that the method is efficiently because we can recover the simulation signal, but unfortunately we can not detect the GW signals in this analysis.

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