Determining the final spin of a binary black hole system including in-plane spins: Method and checks of accuracy

Nathan K. Johnson-McDaniel,1 Anuradha Gupta,2 P. Ajith,1 David Keitel,3 Ofek Birnholtz,4 Frank Ohme,5 and Sascha Husa3 International Centre for Theoretical Sciences, Tata Institute of Fundamental Research, Bengaluru 560089, India Inter-University Centre for Astronomy and Astrophysics, Pune 411007, India Universitat de les Illes Balears and Institut d’Estudis Espacials de Catalunya, 07122 Palma, Spain Albert-Einstein-Institut, Max-Planck-Institut für Gravitationsphysik, 30167 Hannover, Germany Cardiff University, Cardiff CF24 3AA, United Kingdom (Dated: August 6, 2016)