Orateurs
Description
Third generation (3G) gravitational wave (GW) interferometers such as the Einstein Telescope (ET) and Cosmic Explorer (CE) will explore a larger volume of the Universe with respect to now, detecting up to 10$^{5}$ binary neutron star system mergers (BNS) per year and revolutionizing GW multi-messenger (MM) astrophysics. The error volume on the sky position of such BNS will be large and finding the faint optical-NIR electromagnetic (EM) counterparts among a huge number of contaminants will be challenging. Spectroscopy will likely become the bottleneck of GW MM science, being the only secure tool to identify and characterise EM counterparts. New observational strategies will be necessary and they have to be prepared well in advance of ET operations.
I will present the results of the simulations I carried out within the Wide-Field Spectroscopic Telescope science team and the MM Division of the ET Observational Science Board to assess the impact of next generation Integral Field and Multi-Object Spectroscopy (IFS and MOS) on the detection, identification and characterisation of EM counterparts of ET BNS.
I will consider different observational strategies and show the key role of WST-like instruments in answering the observational challenges of MM observations of next-generation GW interferometers.