We present results of more than three decades of timing measurements of the first known binary pulsar, PSR B1913+16. Like most other pulsars, its rotational behavior over such long timescales is significantly affected by small-scale irregularities not explicitly accounted for in a deterministic model. Nevertheless, the physically important astrometric, spin, and orbital parameters are well determined and well decoupled from the timing noise. We have determined a significant result for proper motion, mu(alpha) = -1.43 +/- 0.13, mu(delta) = -0.70 +/- 0.13 mas yr(-1). The pulsar exhibited a small timing glitch in 2003 May, with Delta f / f = 3.7 x 10(-11), and a smaller timing peculiarity in mid-1992. A relativistic solution for orbital parameters yields improved mass estimates for the pulsar and its companion, m(1) = 1.4398 +/- 0.0002 M-circle dot and m(2) = 1.3886 +/- 0.0002 M-circle dot. The system's orbital period has been decreasing at a rate 0.997 +/- 0.002 times that predicted as a result of gravitational radiation damping in general relativity. As we have shown before, this result provides conclusive evidence for the existence of gravitational radiation as predicted by Einstein's theory.
Title
Timing measurements of the relatavistic binary pulsar PSR B1913+16
Weisberg, J. M., D. J. Nice, and J. H. Taylor. (20 Oct. 2010) "Timing measurements of the relatavistic binary pulsar PSR B1913+16." The Astrophysical Journal 722 (2): 1030-1034.