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Authors: Kazuhiro Hayama, Shantanu Desai, Kei Kotake, Soumya D. Mohanty, Malik Rakhmanov, Tiffany Summerscales, Sanichiro Yoshida

Date: 28 Jul 2008

Abstract: Core-collapse supernovae are promising sources of gravitational waves. The supernova rate in our galaxy is sufficient that a supernova might occur soon and the most probable location is near the Galactic center. The current interferometric gravitational wave detectors such as LIGO and VIRGO can detect these signals from supernovae in our galaxy. Recent simulations of supernova core collapse performed by various groups show that generic features of the waveforms are determined by the rotational nature of the core. Specifically, they predict a negative sign for the second peak in the gravitational wave strain signal if the rotation law of the core dynamics is cylindrical and the differential rotation is strong. The sign of the second peak could be detected by the ground-based gravitational wave detectors. We present a data analysis procedure aiming at the detection of the second peaks using a coherent network analysis and estimated the detection efficiency when a supernova was at the sky location of the Galactic center. The simulations we performed using an idealized network of gravitational waves detectors give encouraging results.

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