FROM TH2F
constant
0.007366993958826048+-0.01040856120647978
chi2/ndof = 0.017318929678110922
plane
0.05573014016865754+-0.08780876687409692
invpt slope = -0.006719778723645457+-0.010020665594380024
theta slope = -0.027421545563602674+-0.06997433752982052
chi2/ndof = 0.010060337142262718
from tgraph2D
constant
0.02442759917972464+-0.0013817920686707936
chi2/ndof = 0.00014511054839800225
plane
0.07235704196327843+-0.004768381821923348
invpt slope = -0.00034764790956426123+-0.0006686380191105438
theta slope = -0.04554740523517794+-0.004484222899021503
chi2/ndof = 6.097715928863446e-05