Decay orbital period of the binary system on gravitational waves’ detection

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Gravitational Waves had been fifth detected which is on PSR 1913+16 at 1974 until 1981 by Arecibo Telescope, on GW150914, GW151226, and GW170104 by LIGO and the last is on GW170814 by LIGO and VIRGO. The research made a binary system dynamic modeling by using linearization theorem and post-Newtonian formalism. This modeling is a binary system with two mass identically orbiting each other on the center of circular orbit. By this modelling will get decay orbital period of system for the fifth data of gravitational waves’ detection is -1,073 x 10-12 for PSR 1913+16, -81,956 x 10-12 for GW150914, -2,56 x 10-12 for GW151226, -73,73 x 10-12 for GW170104, and -44,94 x 10-12 for GW170814. The result can inform us about time which using system to combine be a more massive system (a black hole or a pulsar).