Search for inspiralling binary events in the Virgo Engineering Run data

Acernese, F.; Amico, P.; Arnaud, N.; Babusci, D.; Barillé, R.; Barone, F.; Barsotti, L.; Barsuglia, M.; Beauville, F.; Bizouard, M. A.; Boccara, C.; Bondu, F.; Bosi, L.; Bradaschia, C.; Bracci, L.; Braccini, S.; Brillet, A.; Brisson, V.; Brocco, L.; Buskulic, D.; Calamai, G.; Calloni, E.; Campagna, E.; Cavalier, F.; Cella, G.; CHASSANDE MOTTIN, E.; Cleva, F.; Cokelaer, T.; Conforto, Giovanni; Corda, C.; Coulon, J. P.; Cuoco, E.; Dattilo, V.; Davier, M.; DE ROSA, R.; DI FIORE, L.; DI VIRGILIO, A.; Dujardin, B.; Eleuteri, A.; Enard, D.; Ferrante, I.; Fidecaro, F.; Fiori, I.; Flaminio, R.; Fournier, J. D.; Frasca, S.; Frasconi, F.; Gammaitoni, L.; Gennai, A.; Giazotto, A.; Giordano, G.; Guidi, GIANLUCA MARIA; Heitmann, H.; Hello, P.; Heusse, P.; Holloway, L.; Kreckelbergh, S.; LA PENNA, P.; Loriette, V.; Loupias, M.; Losurdo, G.; Mackowski, J. M.; Majorana, E.; Man, C. N.; Marion, F.; Martelli, Filippo; Masserot, A.; Massonnet, L.; Mazzoni, M.; Milano, L.; Moreau, J.; Moreau, F.; Morgado, N.; Mornet, F.; Mours, B.; Pacheco, J.; Pai, A.; Palomba, C.; Paoletti, F.; Passaquieti, R.; Passuello, D.; Perniola, Bruna; Pinard, L.; Poggiani, R.; Punturo, M.; Puppo, P.; Qipiani, K.; Ramonet, J.; Rapagnani, P.; Reita, V.; Remillieux, A.; Ricci, F.; Ricciardi, I.; Russo, G.; Solimeno, S.; Stanga, R.; Toncelli, A.; Tonelli, M.; Tournefier, E.; Travasso, F.; Trinquet, H.; Varvella, M.; Verkindt, D.; Vetrano, Flavio; Veziant, O.; Vicere', Andrea; Vinet, J. Y.; Vocca, H.; Yvert, M.

doi:10.1088/0264-9381/21/5/048

We report preliminary results of a search for inspiralling binary events, performed on data produced by the Virgo Central Interferometer during the Engineering 4 run. Given the limited sensitivity to gravitational waves, the goal was to test some of the analysis chain elements and their integration. The search method was the matched filtering, supplemented by a χ2 based method for the rejection of non-Gaussian events. The range of masses explored was [2–5] M⊙, while the frequency range considered was [24–1000] Hz. The algorithm was preliminarily tested on simulated data. On real E4 data, candidates were selected by the matched filter when the return SNR value was greater than 7; none of them survived the χ2 test. Further, it was possible to put in correspondence the candidates with precise external disturbances in the apparatus.