The search for periodic sources of gravitational waves is a heavy task from the computational point of view, and optimal methods cannot be applied for wide-area searches. Non-optimal, hierarchical methods have been developed and are based on alternating coherent and incoherent steps. In this paper we discuss the spread of the spectral signal power due to the Earth's rotation. It affects the signal-to-noise ratio in the second, coherent, step of the analysis and a way to take this into account is outlined. Moreover, a new method for the hierarchical data analysis procedure is described.
Spectral filtering for hierarchical search of periodic sources / Frasca, Sergio; C., Palomba. - In: CLASSICAL AND QUANTUM GRAVITY. - ISSN 0264-9381. - 21:20 SPEC. ISS.(2004), pp. S1645-S1654. (Intervento presentato al convegno 8th Gravitational Wave Data Analysis Workshop tenutosi a Milwaukee, WI nel DEC 17-20, 2003) [10.1088/0264-9381/21/20/007].
Spectral filtering for hierarchical search of periodic sources
FRASCA, Sergio;
2004
Abstract
The search for periodic sources of gravitational waves is a heavy task from the computational point of view, and optimal methods cannot be applied for wide-area searches. Non-optimal, hierarchical methods have been developed and are based on alternating coherent and incoherent steps. In this paper we discuss the spread of the spectral signal power due to the Earth's rotation. It affects the signal-to-noise ratio in the second, coherent, step of the analysis and a way to take this into account is outlined. Moreover, a new method for the hierarchical data analysis procedure is described.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
