### GWDAW-8 Abstract: Gravitational Wave Astronomy Using Deci hertz Laser Interferometer

#### takashi nakamura · Kyoto Univ · DECIGO

It may be possible to construct a deci hertz laser interferometer gravitational wave antenna in space with $h_{rms}\sim 10^{-23}$ at $f\sim 0.1{\rm Hz}$ in $\sim 2020$. Using such an antenna we show that the analysis of 1-10 years observational data of the coalescing binary neutron stars or black holes at the distance of $\sim$ 300Mpc will give us the spatial position within $\sim$ an arc minute and the time of the coalescence within $\sim 0.1$ sec $\sim$ week before the event. With the knowledge of the accurate position and the time of final merging event, the follow up simultaneous observation using high frequency ($f\sim 100{\rm Hz}$) gravitational wave antennae as well as electro-magnetic wave antennae from the radio frequency to the ultra high energy gamma ray will reveal the physics in the enigmatic event of the coalescence and the formation of the black hole. If the central engine of short duration GRBs is the coalescing binary neutron star, the de