Constraining the observer angle of the kilonova AT2017gfo associated with GW170817: Implications for the Hubble constant

S. Dhawan, M. Bulla, A. Goobar +2

There is a strong degeneracy between the luminosity distance ($D_L$) and the observer viewing angle (${\theta }_{\mathrm{obs}}$; hereafter viewing angle) of the gravitational wave (GW) source w…