A supernova caused by gravitational

A supernova caused by gravitational collapse of a heavy-star core is expected to emit gravitational waves in a large amplitude since it accelerates an enormous amount of mass dramatically in a short term. Although prediction of the exact waveforms from supernovae is challenging, recent progress in the field of numerical relativity provides estimates of the magnitude of the emitted gravitational waves [6]. A rough estimate of the gravitational wave amplitude from a supernova occurring in a nearby galaxy is of the order of 10 −21 -10 −22 in spacetime strain. The explosion models suggest that the frequency of the emitted gravitational waves are spread widely around 1 kHz. Therefore a supernova in a nearby galaxy can be a reasonable target for terrestrial interferometric gravitational wave detectors, whose target frequency is 10-10 4 Hz.