An advanced LIGO and Virgo's third observing run brought another binary neutron star merger (BNS) and the first neutron-star black hole mergers. While no confirmed kilonovae were identified in conjunction with any of these events, continued improvements of analyses surrounding GW170817 allow us to project constraints on the Hubble Constant (H0), the Galactic enrichment from r-process nucleosynthesis, and ultra-dense matter possible from forthcoming events. Here, we describe the expected constraints based on the latest expected event rates from the international gravitational-wave network (IGWN) and analyses of GW170817. We show the expected detection rate of gravitational waves and their counterparts, as well as how sensitive potential constraints are to the observed numbers of counterparts. We intend this analysis as support for the community when creating scientifically driven electromagnetic follow-up proposals. During the next observing run O4, we predict an annual detection rate of electromagnetic counterparts from BNS of 0.43−0.26+0.58 (1.97−1.2+2.68) for the Zwicky Transient Facility (Rubin Observatory).
@article{arxiv.2306.09234,
title = {Updated observing scenarios and multi-messenger implications for the International Gravitational-wave Network's O4 and O5},
author = {R. Weizmann Kiendrebeogo and Amanda M. Farah and Emily M. Foley and Abigail Gray and Nina Kunert and Anna Puecher and Andrew Toivonen and R. Oliver VandenBerg and Shreya Anand and Tomás Ahumada and Viraj Karambelkar and Michael W. Coughlin and Tim Dietrich and S. Zacharie Kam and Peter T. H. Pang and Leo P. Singer and Niharika Sravan},
journal= {arXiv preprint arXiv:2306.09234},
year = {2023}
}