Table 2: Parameters of fits to O-C times.
  $\kappa_0$ $\kappa_1$ $\kappa_2$ $\kappa_3$ $\kappa_{\rm d}$ $\kappa _{\phi }$ $\phi_0$ $\chi ^2$ AIC$_{\rm c}$ wi
  s 10-3s 10-7s 10-10s s 10-3rad rad - - -
Linear $3.6\pm 1.0$ $7.3\pm0.4$ - - - - - 37.94 49.4 0.002
${\rm O{-}C}=\kappa_0+E\kappa_1$        
Parabola $-1.5\pm 1.5$ $8.7 \pm 0.5$ $7.0 \pm 1.3$ - - - - 11.57 37.4 0.649
${\rm O{-}C}=\kappa_0+E\kappa_1+E^{2}\kappa_2$        
Third Order Polynomial $-1.1\pm 1.7$ $8.0 \pm 2.0$ $7.8 \pm 2.6$ $0.4\pm 1.1$ - - - 11.45 41.6 0.079
${\rm O{-}C}=\kappa_0+E\kappa_1+E^{2}\kappa_2+E^3\kappa_2 $        
Linear + Sine 7.3-4.2+2.1 5.3-0.9+2.1 - - 8.7-3.0+2.2 1.18-0.24+0.36 4.1-0.7+0.4 6.18 39.1 0.270
${\rm O{-}C}=\kappa_0+E\kappa_1+\kappa_{\rm d} \sin(E \kappa_\phi+\phi_0)$                    


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