Linear:  T0=2456139.073600±0.000024 d,  P=1.338231231±0.000000024 d,  chi2=463.27, BIC=471.82
Quadratic: T0=2456139.073863±0.000028 d,  P=1.338231386±0.000000026 d,  Q=-5.794e-10±3.282e-11 d/E^2,  Pdot=-13.66±0.77 ms/yr,  chi2=151.51, BIC=164.34
ΔBIC (quad - lin) = -307.48
