FROM TH2F
constant
33.21647898428384+-0.48195753938613023
chi2/ndof = 24.616022965477587
plane
73.2092835280992+-2.1762261457200798
invpt slope = -2.0010712849164674+-0.21505849906322347
theta slope = -27.184601988425754+-1.8149911741693672
chi2/ndof = 22.12668707867633
from tgraph2D
constant
56.90645219214203+-2.4118901423210137
chi2/ndof = 878.3993241674507
plane
71.63304960742953+-11.797118627163467
invpt slope = -2.93340849179579+-1.071112399885865
theta slope = -4.754047953175869+-10.66047567889227
chi2/ndof = 839.9505167398484