GWDAW-8 Abstract: Coincidence and Coherent Analysis for Burst search in an ITF network

Cavalier Fabien · LAL-Orsay · Virgo

As coherent algorithms use a more complete information than coincidence methods, they are expected to provide better detection performances, but at a higher computational cost. An efficient filter must yield a good compromise between a low false alarm rate (hence triggering on data at a manageable rate) and a high detection efficiency. Therefore, the comparison of the two approaches is achieved using so-called Receiving Operating Characteristics (ROC), giving the relationship between the false alarm rate and the detection efficiency for a given method. This presentation investigates this question via Monte-Carlo simulations. Its main conclusions are twofold. First, a three-interferometer network like Virgo-LIGO is too small to reach good detection efficiencies at low false alarm rates: larger configurations are suitable. Second, coincidence strategies are clearly less efficient than coherent analyses which appear feasible for burst searches. Therefore, developing such methods should be