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S18B0008abst

S18B0008

We propose ToO observations of gravitational wave (GW) sources detected with LIGO and Virgo. The state-of-the-art GW detectors, LIGO and Virgo have detected the GW signal from a neutron star (NS) merger GW170817 on August 17 2018. The intense electromagnetic (EM) emission was associated with this event and our observation team J-GEM (Japanese collaboration for Gravitational-wave Electro-Magnetic follow-up) successfully detected and follow-upped this EM counterpart using Subaru HSC and MOIRCS, and found evidence of r-process nucleosynthesis in the ejecta of the merger. The third long-term operation (∼9 months; O3) of LIGO and Virgo is planned in the late this year. GWs from an order of 10 NS–NS mergers are expected to be detected in O3. We plan to make EM follow-up observations with HSC, FOCAS, MOIRCS, IRCS, or HDS of Subaru Telescope in the framework of J-GEM to reveal the nature of NS merger. In particular, wide field and deep imaging capability of HSC will play a very unique role in searching for EM emission from GW sources in the world.

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