Speaker
Description
An aim of J-GEM (Japanese collaboration for Gravitational-wave Electro-Magnetic follow-up) is to identify and follow-up a gravitational-wave (GW) electromagnetic (EM ) counterpart in optical and near-infrared wavelengths. J-GEM is constructed by 12 Japanese optical and/or near-infrared telescopes located on different longitudes. The EM counterpart of GW170817 which is a neutron star-neutron star merger has been observed in optical and near-infrared bands by these telescopes of J-GEM. We can observe an EM counterpart whenever the GW alert happens, because of different longitudes of the telescopes. We will perform survey observations of candidate galaxies located on a probable region of a GW arrival direction to identify the EM counterpart of the GW source. To make the survey effectively, we arrange web systems to share real-time information of candidate galaxies for O3 run. Furthermore, our telescopes having large field of views including Subaru/Hyper Suprime-Cam will also perform a survey of the probable region. I will talk about a strategy for the identification and observation of the EM counterpart of the GW source using our optical and/or near-infrared telescopes.
